ORCID Profile
0000-0003-3157-7796
Current Organisations
Macquarie University
,
Macquarie University Faculty of Science
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Numerical Analysis | Other Physical Sciences | Manufacturing Engineering | Quantum Physics | Biomedical Instrumentation | Optical Properties of Materials | Sensory Systems | Microtechnology | Synchrotrons; Accelerators; Instruments and Techniques | Quantum Information, Computation and Communication
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Technology | Expanding Knowledge in the Physical Sciences | Medical Instruments | Expanding Knowledge in Engineering | Expanding Knowledge in the Biological Sciences |
Related Links
Publications
Recent Advances in Sensing and Assessment of Corrosion in Sewage Pipelines
Publisher: Elsevier BV
Date: 03-2021
Surface modification of polypropylene membrane for the removal of iodine using polydopamine chemistry
Publisher: Elsevier BV
Date: 06-2020
Metal-organic frameworks (MOF) based heat transfer: A comprehensive review
Publisher: Elsevier BV
Date: 12-2022
Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia
Publisher: Elsevier BV
Date: 04-2021
Touch at a distance sensing: lateral-line inspired MEMS flow sensors
Publisher: IOP Publishing
Date: 07-11-2014
DOI: 10.1088/1748-3182/9/4/046011
Abstract: Evolution bestowed the blind cavefish with a resourcefully designed lateral-line of sensors that play an essential role in many important tasks including object detection and avoidance, energy-efficient maneuvering, rheotaxis etc. Biologists identified the two types of vital sensors on the fish bodies called the superficial neuromasts and the canal neuromasts that are responsible for flow sensing and pressure-gradient sensing, respectively. In this work, we present the design, fabrication and experimental characterization of biomimetic polymer artificial superficial neuromast micro-sensor arrays. These biomimetic micro-sensors demonstrated a high sensitivity of 0.9 mV/(m s(-1)) and 0.022 V/(m s(-1)) and threshold velocity detection limits of 0.1 m s(-1) and 0.015 m s(-1) in determining air and water flows respectively. Experimental results demonstrate that the biological canal inspired polymer encapsulation on the array of artificial superficial neuromast sensors is capable of filtering steady-state flows that could otherwise significantly mask the relevant oscillatory flow signals of high importance.
Engineering miniaturized hair cell sensors for auditory system
Publisher: IEEE
Date: 2017
Engineering biomimetic hair bundle sensors for underwater sensing applications
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5038533
From Biological Cilia to Artificial Flow Sensors: Biomimetic Soft Polymer Nanosensors with High Sensing Performance
Publisher: Springer Science and Business Media LLC
Date: 13-09-2016
DOI: 10.1038/SREP32955
Abstract: We report the development of a new class of miniature all-polymer flow sensors that closely mimic the intricate morphology of the mechanosensory ciliary bundles in biological hair cells. An artificial ciliary bundle is achieved by fabricating bundled polydimethylsiloxane (PDMS) micro-pillars with graded heights and electrospinning polyvinylidenefluoride (PVDF) piezoelectric nanofiber tip links. The piezoelectric nature of a single nanofiber tip link is confirmed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Rheology and nanoindentation experiments are used to ensure that the viscous properties of the hyaluronic acid (HA)-based hydrogel are close to the biological cupula. A dome-shaped HA hydrogel cupula that encapsulates the artificial hair cell bundle is formed through precision drop-casting and swelling processes. Fluid drag force actuates the hydrogel cupula and deflects the micro-pillar bundle, stretching the nanofibers and generating electric charges. Functioning with principles analogous to the hair bundles, the sensors achieve a sensitivity and threshold detection limit of 300 mV/(m/s) and 8 μm/s, respectively. These self-powered, sensitive, flexible, biocompatibale and miniaturized sensors can find extensive applications in navigation and maneuvering of underwater robots, artificial hearing systems, biomedical and microfluidic devices.
Flexible, zero powered, piezoelectric MEMS pressure sensor arrays for fish-like passive underwater sensing in marine vehicles
Publisher: IEEE
Date: 2013
Artificial Intelligence‐Based Material Discovery for Clean Energy Future
Publisher: Wiley
Date: 04-08-2022
Abstract: Artificial intelligence (AI)‐assisted materials design and discovery methods can come to the aid of global concerns for introducing new efficient materials in different applications. Also, a sustainable clean future requires a transition to a low‐carbon economy that is material‐intensive. AI‐assisted methods advent as inexpensive and accelerated methods in the design of new materials for clean energies. Herein, the emerging research area of AI‐assisted material discovery with a focus on developing clean energies is discussed. The applications, advantages, and challenges of using AI in material discovery are discussed and the future perspective of using AI in clean energy is studied. This perspective paves the way for a better understanding of the future of AI applications in clean energies.
Design of a terahertz source using a nano-slot of GaAs
Publisher: Springer Science and Business Media LLC
Date: 29-06-2014
Advances in MEMS and Microfluidics‐Based Energy Harvesting Technologies
Publisher: Wiley
Date: 09-02-2022
Abstract: Energy harvesting from mechanical vibrations, thermal gradients, electromagnetic radiations, and solar radiations has experienced rapid progress in recent times not only to develop an alternative power source that can replace conventional batteries to energize portable and personal electronics smartly but also to achieve sustainable self‐sufficient micro/nanosystems. Utilizing micro‐electromechanical system (MEMS) and microfluidics technologies through selective designs and fabrications effectively, those energy harvesters can be considerably downsized while ensuring a stable, portable, and consistent power supply. Although ambient energy sources such as solar radiation are harvested for decades, recent developments have enabled ambient vibrations, electromagnetic radiation, and heat to be harvested wirelessly, independently, and sustainably. Developments in the field of microfluidics have also led to the design and fabrication of novel energy harvesting devices. This paper reviews the recent advancements in energy harvesting technologies such as piezoelectric, electromagnetic, electrostatic, thermoelectric, radio frequency, and solar to drive self‐powered portable electronics. Moreover, the potential application of MEMS and microfluidics as well as MEMS‐based structures and fabrication techniques for energy harvesting are summarized and presented. Finally, a few crucial challenges affecting the performance of energy harvesters are addressed.
Superlattice Barrier HgCdTe nBn Infrared Photodetectors
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2016
Scalable fabrication of tunable titanium nanotubes via sonoelectrochemical process for biomedical applications
Publisher: Elsevier BV
Date: 06-2020
DOI: 10.1016/J.ULTSONCH.2019.104783
Abstract: Titanium does not react well with the human tissues and due to its bio-inert nature the surface modification has yet to be well-studied. In this study, the sonoelectrochemical process has been carried out to generate TiO
Paper-based membraneless hydrogen peroxide fuel cell prepared by micro-fabrication
Publisher: Elsevier BV
Date: 2016
Three Dimensional Printable Prototype to Realize Uniformity in Aperture Phase Distribution
Publisher: IEEE
Date: 23-07-2023
Development of a fiber-based membraneless hydrogen peroxide fuel cell
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA08333E
Abstract: Polyvinylidene fluoride (PVDF) electrospun nano-fiber is suggested as the substrate material for developing biocompatible membraneless hydrogen peroxide fuel cells.
Designing Angstrom‐Scale Asymmetric MOF‐on‐MOF Cavities for High Monovalent Ion Selectivity
Publisher: Wiley
Date: 20-01-2022
Abstract: Biological ion channels feature angstrom‐scale asymmetrical cavity structures, which are the key to achieving highly efficient separation and sensing of alkali metal ions from aqueous resources. The clean energy future and lithium‐based energy storage systems heavily rely on highly efficient ionic separations. However, artificial recreation of such a sophisticated biostructure has been technically challenging. Here, a highly tunable design concept is introduced to fabricate monovalent ion‐selective membranes with asymmetric sub‐nanometer pores in which energy barriers are implanted. The energy barriers act against ionic movements, which hold the target ion while facilitating the transport of competing ions. The membrane consists of bilayer metal‐organic frameworks (MOF‐on‐MOF), possessing a 6 to 3.4‐angstrom passable cavity structure. The ionic current measurements exhibit an unprecedented ionic current rectification ratio of above 100 with exceptionally high selectivity ratios of 84 and 80 for K + /Li + and Na + / Li + , respectively (1.14 Li + mol m −2 h −1 ). Furthermore, using quantum mechanics/molecular mechanics, it is shown that the combined effect of spatial hindrance and nucleophilic entrapment to induce energy surge baffles is responsible for the membrane's ultrahigh selectivity and ion rectification. This work demonstrates a striking advance in developing monovalent ion‐selective channels and has implications in sensing, energy storage, and separation technologies.
A bio-inspired vestibular system using MEMS sensors and 3D printing technology
Publisher: IEEE
Date: 12-2019
Harbor seal whisker inspired flow sensors to reduce vortex-induced vibrations
Publisher: IEEE
Date: 2015
Ion Selective Nanochannels: From Critical Principles to Sensing and Biosensing Applications
Publisher: Wiley
Date: 13-05-2021
Abstract: Nanochannels offer significant practical advantages in many fields due to their interesting characteristics, such as flexibility in shape and size, robustness, low‐cost and their ability to be modified based on the required applications. The effectiveness of ion separation in nanochannels can be assessed based on the selective transport of the desired ions and the rate of the transportation process. This paper aims to provide an extensive review of ion‐based nanochannels, including their working principles and ion‐selective behaviors. Nanochannel fabrication strategies and their applications are discussed. Key nanochannel design factors and their roles in governing ion‐selective transport are also reviewed. The contribution of size, charge, wettability, and recognition ability of the nanochannels on the selectivity mechanisms are discussed. Specific consideration is made to nanochannel applications in sensing and biosensing assays. Finally, an attempt is made to address the commercial implementation and future outlook of the nanochannels to guide researchers in emerging avenues of research.
Static droplet array for culturing single live adherent cells in an isolated chemical microenvironment
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8LC00403J
Abstract: Rapid and reliable capture and analysis of single cells in a chemically isolated static droplet array for fast-tracking single cell discoveries.
Piezoelectric sensor array for passive fish-like underwater sensing
Publisher: IEEE
Date: 10-2012
Conventional and advanced techniques of wastewater monitoring and treatment
Publisher: Elsevier
Date: 2021
Conical rotation of beam using three dimensional printable prototype
Publisher: IEEE
Date: 16-05-2022
Hyaluronidase enzyme conjugated polyamidoamine dendrimer: An efficient and stable nanobiocatalyst for enzymatic degradation of hyaluronic acid
Publisher: Elsevier BV
Date: 03-2022
Crocodile-inspired dome-shaped pressure receptors for passive hydrodynamic sensing
Publisher: IOP Publishing
Date: 22-08-2016
DOI: 10.1088/1748-3190/11/5/056007
Abstract: Passive mechanosensing is an energy-efficient and effective recourse for autonomous underwater vehicles (AUVs) for perceiving their surroundings. The passive sensory organs of aquatic animals have provided inspiration to biomimetic researchers for developing underwater passive sensing systems for AUVs. This work is inspired by the 'integumentary sensory organs' (ISOs) which are dispersed on the skin of crocodiles and are equipped with slowly adapting (SA) and rapidly adapting (RA) receptors. ISOs assist crocodiles in locating the origin of a disturbance, both on the water surface and under water, thereby enabling them to hunt prey even in a dark environment and turbid waters. In this study, we construct SA dome receptors embedded with microelectromechanical systems (MEMS) piezoresistive sensors to measure the steady-state pressures imparted by flows and RA dome receptors embedded with MEMS piezoelectric sensors to detect oscillatory pressures in water. Experimental results manifest the ability of SA and RA dome receptors to sense the direction of steady-state flows and oscillatory disturbances, respectively. As a proof of concept, the SA domes are tested on the hull of a kayak under various pressure variations owing to different types of movements of the hull. Our results indicate that the dome receptors are capable of discerning the angle of attack and speed of the flow.
Development of a Biomimetic semicircular canal with MEMS sensors to restore balance
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
FEA analysis on the optimum placement of sensor for early detection of damage in concrete pavements
Publisher: Springer International Publishing
Date: 2022
Low humid transport of anions in layered double hydroxides membranes using polydopamine coating
Publisher: Elsevier BV
Date: 04-2021
Nanofibril scaffold assisted MEMS artificial hydrogel neuromasts for enhanced sensitivity flow sensing
Publisher: Springer Science and Business Media LLC
Date: 14-01-2016
DOI: 10.1038/SREP19336
Abstract: We present the development and testing of superficial neuromast-inspired flow sensors that also attain high sensitivity and resolution through a biomimetic hyaulronic acid-based hydrogel cupula dressing. The inspiration comes from the spatially distributed neuromasts of the blind cavefish that live in completely dark undersea caves the sensors enable the fish to form three-dimensional flow and object maps, enabling them to maneuver efficiently in cluttered environments. A canopy shaped electrospun nanofibril scaffold, inspired by the cupular fibrils, assists the drop-casting process allowing the formation of a prolate spheroid-shaped artificial cupula. Rheological and nanoindentation characterizations showed that the Young’s modulus of the artificial cupula closely matches the biological cupula (10–100 Pa). A comparative experimental study conducted to evaluate the sensitivities of the naked hair cell sensor and the cupula-dressed sensor in sensing steady-state flows demonstrated a sensitivity enhancement by 3.5–5 times due to the presence of hydrogel cupula. The novel strategies of sensor development presented in this report are applicable to the design and fabrication of other biomimetic sensors as well. The developed sensors can be used in the navigation and maneuvering of underwater robots, but can also find applications in biomedical and microfluidic devices.
Mussel inspired bacterial denitrification of water using fractal patterns of polydopamine
Publisher: Elsevier BV
Date: 02-2020
Sensing advancement towards safety assessment of hydrogen fuel cell vehicles
Publisher: Elsevier BV
Date: 03-2021
Development and testing of bio-inspired microelectromechanical pressure sensor arrays for increased situational awareness for marine vehicles
Publisher: IOP Publishing
Date: 06-12-2012
Towards a Low-Power, Minimally-Invasive Nerve Regeneration
Publisher: IEEE
Date: 11-2019
Highly stretchable strain sensors based on AgNWs/PV a nanocomposite hydrogels
Publisher: IEEE
Date: 12-2019
A flexible liquid crystal polymer MEMS pressure sensor array for fish-like underwater sensing
Publisher: IOP Publishing
Date: 26-10-2012
Mass transfer and flow in additive manufacturing of a spherical component
Publisher: Springer Science and Business Media LLC
Date: 12-03-2018
MEMS sensors for assessing flow-related control of an underwater biomimetic robotic stingray
Publisher: IOP Publishing
Date: 18-05-2015
DOI: 10.1088/1748-3190/10/3/036008
Abstract: A major difference between manmade underwater robotic vehicles (URVs) and undersea animals is the dense arrays of sensors on the body of the latter which enable them to execute extreme control of their limbs and demonstrate super-maneuverability. There is a high demand for miniaturized, low-powered, lightweight and robust sensors that can perform sensing on URVs to improve their control and maneuverability. In this paper, we present the design, fabrication and experimental testing of two types of microelectromechanical systems (MEMS) sensors that benefit the situational awareness and control of a robotic stingray. The first one is a piezoresistive liquid crystal polymer haircell flow sensor which is employed to determine the velocity of propagation of the stingray. The second one is Pb(Zr(0.52)Ti(0.48))O3 piezoelectric micro-diaphragm pressure sensor which measures various flapping parameters of the stingray's fins that are key parameters to control the robot locomotion. The polymer flow sensors determine that by increasing the flapping frequency of the fins from 0.5 to 3 Hz the average velocity of the stingray increases from 0.05 to 0.4 BL s(-1), respectively. The role of these sensors in detecting errors in control and functioning of the actuators in performing tasks like flapping at a desired litude and frequency, swimming at a desired velocity and direction are quantified. The proposed sensors are also used to provide inputs for a model predictive control which allows the robot to track a desired trajectory. Although a robotic stingray is used as a platform to emphasize the role of the MEMS sensors, the applications can be extended to most URVs.
Effects of sample rheology on the equilibrium position of particles and cells within a spiral microfluidic channel
Publisher: Springer Science and Business Media LLC
Date: 10-08-2021
A Stripline-Based Planar Wideband Feed for High-Gain Antennas with Partially Reflecting Superstructure
Publisher: MDPI AG
Date: 07-05-2019
DOI: 10.3390/MI10050308
Abstract: This paper presents a new planar feeding structure for wideband resonant-cavity antennas (RCAs). The feeding structure consists of two stacked dielectric slabs with an air-gap in between. A U-shaped slot, etched in the top metal-cladding over the upper dielectric slab, is fed by a planar stripline printed on the back side of the dielectric slab. The lower dielectric slab backed by a ground plane, is used to reduce back radiation. To validate the wideband performance of the new structure, in an RCA configuration, it was integrated with a wideband all-dielectric single-layer partially reflecting superstructure (PRS) with a transverse permittivity gradient (TPG). The single-layer RCA fed by the U-slot feeding structure demonstrated a peak directivity of 18.5 dBi with a 3 dB directivity bandwidth of 32%. An RCA prototype was fabricated and experimental results are presented.
MEMS artificial neuromast arrays for hydrodynamic control of soft-robots
Publisher: IEEE
Date: 04-2016
Using explainable deep learning in da Vinci Xi robot for tumor detection
Publisher: Walter de Gruyter GmbH
Date: 2021
Abstract: Deep learning has proved successful in computer-aided detection in interpreting ultrasound images, COVID infections, identifying tumors from computed tomography (CT) scans for humans and animals. This paper proposes applications of deep learning in detecting cancerous cells inside patients via laparoscopic camera on da Vinci Xi surgical robots. The paper presents method for detecting tumor via object detection and classification/localizing using GRAD-CAM. Localization means heat map is drawn on the image highlighting the classified class. Analyzing images collected from publicly available partial robotic nephrectomy videos, for object detection, the final mAP was 0.974 and for classification the accuracy was 0.84.
Customizing nano-chitosan for sustainable drug delivery
Publisher: Elsevier BV
Date: 10-2022
DOI: 10.1016/J.JCONREL.2022.07.038
Abstract: Chitosan is a natural polymer with acceptable biocompatibility, biodegradability, and mechanical stability hence, it has been widely appraised for drug and gene delivery applications. However, there has been no comprehensive assessment to tailor-make chitosan cross-linkers of various types and functionalities as well as complex chitosan-based semi- and full-interpenetrating networks for drug delivery systems (DDSs). Herein, various fabrication methods developed for chitosan hydrogels are deliberated, including chitosan crosslinking with and without erse cross-linkers. Tripolyphosphate, genipin and multi-functional aldehydes, carboxylic acids, and epoxides are common cross-linkers used in developing biomedical chitosan for DDSs. Methods deployed for modifying the properties and performance of chitosan hydrogels, via their composite production (semi- and full-interpenetrating networks), are also cogitated here. In addition, recent advances in the fabrication of advanced chitosan hydrogels for drug delivery applications such as oral drug delivery, transdermal drug delivery, and cancer therapy are discussed. Lastly, thoughts on what is needed for the chitosan field to continue to grow is also debated in this comprehensive review article.
Recent advancements in bioelectronic devices to interface with the peripheral vestibular system
Publisher: Elsevier BV
Date: 10-2022
DOI: 10.1016/J.BIOS.2022.114521
Abstract: Balance disorders affect approximately 30% of the population throughout their lives and result in debilitating symptoms, such as spontaneous vertigo, nystagmus, and oscillopsia. The main cause of balance disorders is peripheral vestibular dysfunction, which may occur as a result of hair cell loss, neural dysfunction, or mechanical (and morphological) abnormality. The most common cause of vestibular dysfunction is arguably vestibular hair cell damage, which can result from an array of factors, such as ototoxicity, trauma, genetics, and ageing. One promising therapy is the vestibular prosthesis, which leverages the success of the cochlear implant, and endeavours to electrically integrate the primary vestibular afferents with the vestibular scene. Other translational approaches of interest include stem cell regeneration and gene therapies, which aim to restore or modify inner ear receptor function. However, both of these techniques are in their infancy and are currently undergoing further characterization and development in the laboratory, using animal models. Another promising translational avenue to treating vestibular hair cell dysfunction is the potential development of artificial biocompatible hair cell sensors, aiming to replicate functional hair cells and generate synthetic 'receptor potentials' for sensory coding of vestibular stimuli to the brain. Recently, artificial hair cell sensors have demonstrated significant promise, with improvements in their output, such as sensitivity and frequency selectivity. This article reviews the history and current state of bioelectronic devices to interface with the labyrinth, spanning the vestibular implant and artificial hair cell sensors.
Soft polymer membrane micro-sensor arrays inspired by the mechanosensory lateral line on the blind cavefish
Publisher: SAGE Publications
Date: 17-02-2014
Abstract: This article reports the development of flexible arrays of soft membrane microelectromechanical system pressure sensors that are inspired by the functional implications of the lateral line organ present in the blind cavefish. Being blind, this fish relies on the lateral line of pressure gradient sensors present on its body to sense the surrounding obstacles. A flexible, low-powered, lightweight, sensitive yet robust microelectromechanical system sensor array is fabricated using liquid crystal polymer material. Such arrays can guide an autonomous underwater vehicle to navigate in unsteady and dirty-water environments. The object detection abilities of the blind cave characin fish are investigated through proof-of-concept experiments conducted on the live fish. Similarly, the abilities of the microelectromechanical system array in determining the velocity and distance of an underwater object are investigated by testing them in water tunnel. Experimental results demonstrate the array’s ability to detect the velocity of moving underwater objects with a high accuracy and an average error of only 2.5%.
Improved particle swarm optimization-based artificial neural network for rainfall-runoff modeling
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2014
A miniaturized piezoresistive flow sensor for real‐time monitoring of intravenous infusion
Publisher: Wiley
Date: 20-05-2019
DOI: 10.1002/JBM.B.34412
Abstract: Drug overdose (DO) is considered one of the current issues of intravenous (IV) infusion particularly resulting in serious injuries and deaths. Malfunction of infusion pumps is reported as the main cause of the drug overdose. Live monitoring and flow rate calculation by health professionals have been practicing to avoid DO. However, human errors and miscalculations are inevitable. A secondary measurement tool is required to avoid the risk of OD when infusion pump malfunctions cannot be detected immediately. Here, inspired by nature, we developed a real-time monitoring device through which an administrator can review, evaluate, and modify the IV infusion process. Our flow sensor possesses an erected polymer hair cell on a multi-layered silicon base forming from a patterned gold strained gauge layer on a piezoresistive liquid crystal polymer (LCP) membrane. Gold strain gauges on an LCP membrane have been used instead of a piezoresistive silicon membrane as the sensing element. The combination of gold strain gauges and LCP membrane provides better sensitivity than a piezoresistive silicon membrane of the same dimensions and thickness. We also miniaturized our biocompatible sensor such that it can be possible to install it inside the IV tube in contact with the liquid providing an in-suite online flow monitoring. The proposed LCP membrane sensor is compared with two commercially available IV sensors to validate its flow sensing ability. The experimental results demonstrate that the proposed sensor provides a low threshold detection limit of 5 mL/hr, which betters the performance of other commercial sensors at low flow rates.
3D Printing of Inertial Microfluidic Devices.
Publisher: Springer Science and Business Media LLC
Date: 03-04-2020
DOI: 10.1038/S41598-020-62569-9
Abstract: Inertial microfluidics has been broadly investigated, resulting in the development of various applications, mainly for particle or cell separation. Lateral migrations of these particles within a microchannel strictly depend on the channel design and its cross-section. Nonetheless, the fabrication of these microchannels is a continuous challenging issue for the microfluidic community, where the most studied channel cross-sections are limited to only rectangular and more recently trapezoidal microchannels. As a result, a huge amount of potential remains intact for other geometries with cross-sections difficult to fabricate with standard microfabrication techniques. In this study, by leveraging on benefits of additive manufacturing, we have proposed a new method for the fabrication of inertial microfluidic devices. In our proposed workflow, parts are first printed via a high-resolution DLP/SLA 3D printer and then bonded to a transparent PMMA sheet using a double-coated pressure-sensitive adhesive tape. Using this method, we have fabricated and tested a plethora of existing inertial microfluidic devices, whether in a single or multiplexed manner, such as straight, spiral, serpentine, curvilinear, and contraction-expansion arrays. Our characterizations using both particles and cells revealed that the produced chips could withstand a pressure up to 150 psi with minimum interference of the tape to the total functionality of the device and viability of cells. As a showcase of the versatility of our method, we have proposed a new spiral microchannel with right-angled triangular cross-section which is technically impossible to fabricate using the standard lithography. We are of the opinion that the method proposed in this study will open the door for more complex geometries with the bespoke passive internal flow. Furthermore, the proposed fabrication workflow can be adopted at the production level, enabling large-scale manufacturing of inertial microfluidic devices.
Highly stable Li+ selective electrode with metal-organic framework as ion-to-electron transducer
Publisher: Elsevier BV
Date: 2022
Meniere's disease: Pathogenesis, treatments, and emerging approaches for an idiopathic bioenvironmental disorder
Publisher: Elsevier BV
Date: 08-2023
Design of Metasurface for performance improvement of feed source
Publisher: IEEE
Date: 04-12-2021
N-doped carbon nanospheres as selective fluorescent probes for mercury detection in contaminated aqueous media: chemistry, fluorescence probing, cell line patterning, and liver tissue interaction
Publisher: Springer Science and Business Media LLC
Date: 07-01-2023
Selective separation of microalgae cells using inertial microfluidics
Publisher: Elsevier BV
Date: 03-2018
DOI: 10.1016/J.BIORTECH.2017.12.065
Abstract: Microalgae represent the most promising new source of biomass for the world's growing demands. However, the biomass productivity and quality is significantly decreased by the presence of bacteria or other invading microalgae species in the cultures. We therefore report a low-cost spiral-microchannel that can effectively separate and purify Tetraselmis suecica (lipid-rich microalgae) cultures from Phaeodactylum tricornutum (invasive diatom). Fluorescent polystyrene-microbeads of 6 μm and 10 μm diameters were first used as surrogate particles to optimize the microchannel design by mimicking the microalgae cell behaviour. Using the optimum flowrate, up to 95% of the P. tricornutum cells were separated from the culture without affecting the cell viability. This study shows, for the first time, the potential of inertial microfluidics to sort microalgae species with minimal size difference. Additionally, this approach can also be applied as a pre-sorting technique for water quality analysis.
Lateral-Line Inspired MEMS Neuromast Sensors
Publisher: Springer International Publishing
Date: 23-11-2016
Wide dual-band circularly polarized diecletric resonator
Publisher: MDPI AG
Date: 16-07-2023
DOI: 10.3390/MI14071432
Abstract: This article presents an application of a grounded substrate-based metasurface for hosting dielectric resonators (DRs), enabling a wide dual-band circularly polarized (CP) operation. The antenna structure comprises centrally positioned rectangular DRs, one above the other, along with a 7 × 7 square-slotted metasurface. The metasurface and DRs are hosted above a grounded substrate, which is fed through a single coaxial feed placed at a specific angle, employing a modified upper probe of the coaxial feed. The proposed hybrid technique utilizes the combined benefits of the feed angle and a well-matched metasurface, resulting in performance improvement. Notably, a measured impedance bandwidth of 88.1% for |S11| is achieved within the frequency range of 4.0 GHz to 10.3 GHz. Furthermore, the antenna design exhibits two overlapping measured 3-dB axial ratio (AR) bandwidths: 23.62% from 4.25 GHz to 5.4 GHz and 5.12% from 7.6 GHz to 8 GHz. The peak gain of the antenna is measured at 8.4 dBic. Consequently, this innovative single-feed antenna design, characterized by its compact profile, holds significant potential for realizing multi-band operations. Furthermore, the developed antenna is well-suited for deployment in indoor radio links and INSAT applications.
Recent Advances in Nanogenerator-Driven Self-Powered Implantable Biomedical Devices
Publisher: Wiley
Date: 18-09-2018
Closure to Improved particle swarm optimization-based artificial neural network for rainfall-runoffmodeling by Mohsen Asadnia, Lloyd H. C. Chua, X. S. Qin, and Amin Talei
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2015
Polymer MEMS sensor for flow monitoring in biomedical device applications
Publisher: IEEE
Date: 2017
Influence of applied potential on treatment performance and clogging behaviour of hybrid constructed wetland-microbial electrochemical technologies
Publisher: Elsevier BV
Date: 12-2021
Meta-Analysis of Genome-Wide Association Studies for Abdominal Aortic Aneurysm Identifies Four New Disease-Specific Risk Loci
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 20-01-2017
DOI: 10.1161/CIRCRESAHA.116.308765
Abstract: Abdominal aortic aneurysm (AAA) is a complex disease with both genetic and environmental risk factors. Together, 6 previously identified risk loci only explain a small proportion of the heritability of AAA. To identify additional AAA risk loci using data from all available genome-wide association studies. Through a meta-analysis of 6 genome-wide association study data sets and a validation study totaling 10 204 cases and 107 766 controls, we identified 4 new AAA risk loci: 1q32.3 ( SMYD2 ), 13q12.11 ( LINC00540 ), 20q13.12 (near PCIF1 / MMP9 / ZNF335 ), and 21q22.2 ( ERG ). In various database searches, we observed no new associations between the lead AAA single nucleotide polymorphisms and coronary artery disease, blood pressure, lipids, or diabetes mellitus. Network analyses identified ERG , IL6R , and LDLR as modifiers of MMP9 , with a direct interaction between ERG and MMP9 . The 4 new risk loci for AAA seem to be specific for AAA compared with other cardiovascular diseases and related traits suggesting that traditional cardiovascular risk factor management may only have limited value in preventing the progression of aneurysmal disease.
Natural clay membranes
Publisher: Elsevier BV
Date: 08-2023
Materials discovery of ion-selective membranes using artificial intelligence
Publisher: Springer Science and Business Media LLC
Date: 20-10-2022
DOI: 10.1038/S42004-022-00744-X
Abstract: Significant attempts have been made to improve the production of ion-selective membranes (ISMs) with higher efficiency and lower prices, while the traditional methods have drawbacks of limitations, high cost of experiments, and time-consuming computations. One of the best approaches to remove the experimental limitations is artificial intelligence (AI). This review discusses the role of AI in materials discovery and ISMs engineering. The AI can minimize the need for experimental tests by data analysis to accelerate computational methods based on models using the results of ISMs simulations. The coupling with computational chemistry makes it possible for the AI to consider atomic features in the output models since AI acts as a bridge between the experimental data and computational chemistry to develop models that can use experimental data and atomic properties. This hybrid method can be used in materials discovery of the membranes for ion extraction to investigate capabilities, challenges, and future perspectives of the AI-based materials discovery, which can pave the path for ISMs engineering.
Modeling of TiC-N Thin Film Coating Process on Drills Using Particle Swarm Optimization Algorithm
Publisher: Springer Science and Business Media LLC
Date: 20-03-2013
Performance Enhancement of Small Aperture Horn Antenna by Three Dimensional Printable Prototype
Publisher: IEEE
Date: 10-07-2022
Cupula-Inspired Hyaluronic Acid-Based Hydrogel Encapsulation to Form Biomimetic MEMS Flow Sensors
Publisher: MDPI AG
Date: 28-07-2017
DOI: 10.3390/S17081728
Artificial fish skin of self-powered micro-electromechanical systems hair cells for sensing hydrodynamic flow phenomena
Publisher: The Royal Society
Date: 10-2015
Abstract: Using biological sensors, aquatic animals like fishes are capable of performing impressive behaviours such as super-manoeuvrability, hydrodynamic flow ‘vision’ and object localization with a success unmatched by human-engineered technologies. Inspired by the multiple functionalities of the ubiquitous lateral-line sensors of fishes, we developed flexible and surface-mountable arrays of micro-electromechanical systems (MEMS) artificial hair cell flow sensors. This paper reports the development of the MEMS artificial versions of superficial and canal neuromasts and experimental characterization of their unique flow-sensing roles. Our MEMS flow sensors feature a stereolithographically fabricated polymer hair cell mounted on Pb(Zr 0.52 Ti 0.48 )O 3 micro-diaphragm with floating bottom electrode. Canal-inspired versions are developed by mounting a polymer canal with pores that guide external flows to the hair cells embedded in the canal. Experimental results conducted employing our MEMS artificial superficial neuromasts (SNs) demonstrated a high sensitivity and very low threshold detection limit of 22 mV/(mm s −1 ) and 8.2 µm s −1 , respectively, for an oscillating dipole stimulus vibrating at 35 Hz. Flexible arrays of such superficial sensors were demonstrated to localize an underwater dipole stimulus. Comparative experimental studies revealed a high-pass filtering nature of the canal encapsulated sensors with a cut-off frequency of 10 Hz and a flat frequency response of artificial SNs. Flexible arrays of self-powered, miniaturized, light-weight, low-cost and robust artificial lateral-line systems could enhance the capabilities of underwater vehicles.
Bienzymatic modification of polymeric membranes to mitigate biofouling
Publisher: Elsevier BV
Date: 04-2020
Ultra-sensitive and stretchable strain sensor based on piezoelectric polymeric nanofibers
Publisher: IEEE
Date: 2015
Potent aptamer-based nanosensors for early detection of lung cancer
Publisher: Elsevier
Date: 2021
Test Anxiety and Physiological Arousal: A Systematic Review and Meta-Analysis
Publisher: Springer Science and Business Media LLC
Date: 16-08-2020
A smart multi-sensor device to detect distress in swimmers
Publisher: MDPI AG
Date: 29-01-2022
DOI: 10.3390/S22031059
Abstract: Drowning is considered amongst the top 10 causes of unintentional death, according to the World Health Organization (WHO). Therefore, anti-drowning systems that can save lives by preventing and detecting drowning are much needed. This paper proposes a robust and waterproof sensor-based device to detect distress in swimmers at varying depths and different types of water environments. The proposed device comprises four main components, including heart rate, blood oxygen level, movement, and depth sensors. Although these sensors were designed to work together to boost the system’s capability as an anti-drowning device, each could operate independently. The sensors were able to determine the heart rate to an accuracy of 1 beat per minute (BPM), 1% SpO2, the acceleration with adjustable sensitivities of ±2 g, ±4 g, ±8 g, and ±16 g, and the depth up to 12.8 m. The data obtained from the sensors were sent to a microcontroller that compared the input data to adjustable threshold values to detect dangerous situations. Being in hazardous situations for more than a specific time activated the alarming system. Based on the comparison made in the program and measuring the time of submersion, a message indicating drowning or safe was sent to a lifeguard to continuously monitor the swimmer’ condition via Wi-Fi to an IP address reachable by a mobile phone or laptop. It is also possible to continuously monitor the sensor outputs on the device’s display or the connected mobile phone or laptop. The threshold values could be adjusted based on biometric parameters such as swimming conditions (swimming pool, beach, depth, etc.) and swimmers health and conditions. The functionality of the proposed device was thoroughly tested over a wide range of parameters and under different conditions, both in air and underwater. It was demonstrated that the device could detect a range of potentially hazardous aquatic situations. This work will pave the way for developing an effective drowning sensing system that could save tens of thousands of lives across the globe every year.
Electrospun nanofibrils encapsulated in hydrogel cupula for biomimetic MEMS flow sensor development
Publisher: IEEE
Date: 2013
Carbon nanofiber-reinforced Pt thin film-based airflow sensor for respiratory monitoring
Publisher: Elsevier BV
Date: 11-2022
ZIF-8 Modified Polypropylene Membrane: A Biomimetic Cell Culture Platform with a View to the Improvement of Guided Bone Regeneration.
Publisher: Informa UK Limited
Date: 12-2020
DOI: 10.2147/IJN.S269169
Enhancement of feed source through three dimensional printing
Publisher: MDPI AG
Date: 13-06-2023
DOI: 10.3390/MI14061244
Abstract: The three-dimensional printed wideband prototype (WBP) was proposed, which is able to enhance the horn feed source by generating a more uniform phase distribution that is obtained after correcting aperture phase values. The noted phase variation obtained without the WBP was 163.65∘ for the horn source only, which was decreased to 19.68∘, obtained after the placement of the WBP at a λ/2 distance above the feed horn aperture. The corrected phase value was observed at 6.25 mm (0.25λ) above the top face of the WBP. The use of a five-layer cubic structure is able to generate the proposed WBP with dimensions of 105 mm × 105 mm × 37.5 mm (4.2λ× 4.2λ× 1.5λ), which can improve directivity and gain by 2.5 dB throughout the operating frequency range with a lower side lobe level. The overall dimension of the 3D printed horn was 98.5 mm × 75.6 mm × 192.6 mm (3.94λ× 3.02λ× 7.71λ), where the 100 % infill value was maintained. The horn was painted with a double layer of copper throughout its surface. In a design frequency of 12 GHz, the computed directivity, gain, side lobe level in H- and E- planes were 20.5 dB, 20.5 dB, −26.5 dB, and −12.4 dB with only a 3D printed horn case and, with the proposed prototype placed above this feed source, these values improved to 22.1 dB, 21.9 dB, −15.5 dB, and −17.5 dB, respectively. The realized WBP was 294 g and the overall system was 448 g in weight, which signifies a light weight condition. The measured return loss values were less than 2, which supports that the WBP has matching behavior over the operating frequency range.
Modelling of the thrust force of the drilling operation on PA6-nanoclay nanocomposites using particle swarm optimization
Publisher: SAGE Publications
Date: 08-08-2011
Abstract: This paper presents a new approach for modelling the thrust force in the drilling of PA6–nanoclay (NC) nanocomposite materials, by using a particle-swarm-optimization-based neural network (PSONN). In this regard, the advantages of the statistical experimental algorithm technique, experimental measurements, particle swarm optimization, and artificial neural network were exploited in an integrated manner. For this purpose, numerous experiments for PA6 and PA6–NC nanocomposites were conducted to obtain the thrust force values using a high-speed steel drill 2 mm in diameter with a 118° point angle. Then, a predictive model for the thrust force was created using the PSONN algorithm. The training capacity of the PSONN was compared with that of the conventional neural network. The results indicate that, when the NC content in PA6 is increased, the thrust force of the drilling operation on this material is decreased significantly. Also, the results obtained about the modelling of the thrust force showed the good training capacity of the proposed PSONN algorithm, compared with that of a conventional neural network.
Overview of safety practices in sustainable hydrogen economy – An Australian perspective
Publisher: Elsevier BV
Date: 09-2022
High temperature characterization of PZT(0.52/0.48) thin-film pressure sensors
Publisher: IOP Publishing
Date: 12-12-2013
A review on the contribution of electron flow in electroactive wetlands: Electricity generation and enhanced wastewater treatment
Publisher: Elsevier BV
Date: 09-2020
Biomimetic ultraflexible piezoresistive flow sensor based on graphene nanosheets and PVA hydrogel
Publisher: Wiley
Date: 14-09-2022
Abstract: Flow sensors play a critical role in monitoring flow parameters, including rate, velocity, direction, and rotation frequency. In this paper, inspired by biological hair cells in the human vestibular system, an innovative flow sensor is developed based on polyvinyl alcohol (PVA) hydrogel nanocomposites with a maze‐like network of vertically grown graphene nanosheets (VGNs). The VGNs/PVA hydrogel absorbs a copious amount of water when immersed in water, making the sensor highly sensitive to tiny stimuli underwater. The sensor demonstrates a high sensitivity (5.755 mV (mm s −1 ) −1 ) and extremely low velocity detection (0.022 mm s −1 ). It also reveals outstanding performance in detecting low‐frequency oscillatory flows down to 0.1 Hz, which make it suitable for many biomedical applications. As one of the potential applications of the sensor, it exhibits excellent performance in mimicking various physiological conditions of vestibular hair cells. To explain the experimental results, a complete finite element simulation is developed to model the piezoresistive effect of VGNs/PVA thin film structure. This is the first attempt to develop hydrogel–graphene nanosheet‐based flow sensors, which creates the closest artificial sensor to vestibular hair cells. This miniaturized hair cell sensor paves the way for utilizing hydrogels to develop next‐generation of ultrasensitive flow sensors for biomedical applications.
Green Chromatography Techniques
Publisher: Springer International Publishing
Date: 2022
Applications of Nanomaterials for Greener Food Analysis
Publisher: Springer International Publishing
Date: 2022
Crocodile inspired Dome Pressure sensor for hydrodynamic sensing
Publisher: IEEE
Date: 06-2015
Polymer MEMS pressure sensor arrays for fish-like underwater sensing applications
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2012
Bagley Polygon Power Divider using Simplified Composite Right/Left Handed Transmission Line
Publisher: IEEE
Date: 10-07-2022
Enhanced Piezoelectricity of PVDF-TrFE Nanofibers by Intercalating with Electrosprayed BaTiO3
Publisher: American Chemical Society (ACS)
Date: 23-08-2023
Increasing the Directivity of Resonant Cavity Antennas with Nearfield Transformation Meta-Structure Realized with Stereolithograpy
Publisher: MDPI AG
Date: 02-2021
DOI: 10.3390/ELECTRONICS10030333
Abstract: A simple, nearfield transformation meta-structure is proposed to increase the directivity of resonant cavity antennas (RCA). The meta-structure is comprised of 14 × 14 meta-atoms or so called “unit-cells”, adding localized phase delays in the aperture of the RCA and thus increasing its broadside directivity. A prototype of the meta-structure is additively manufactured using the stereolithograpy process and has a profile of 0.56λ. With the meta-structure integrated with the RCA, it demonstrates a measured broadside directivity of 20.15 dBi without affecting its half-power directivity bandwidth. Benefiting from additive manufacturing, the proposed approach is a simple, light-weight, low-cost, and planar approach that can be tailored to achieve medium-to-high gains with RCAs.
Using miniaturised strain sensors to provide a sense of touch in a humanoid robotic arm
Publisher: Frontiers Media SA
Date: 19-10-2020
Application of nanomaterials for greener sample extraction
Publisher: Springer International Publishing
Date: 2022
Biomimetic Microsensors Inspired by Marine Life
Publisher: Springer International Publishing
Date: 2017
Realization of three dimensional printed multi layer wide band prototype
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Development of an ultra-sensitive and flexible piezoresistive flow sensor using vertical graphene nanosheets
Publisher: Springer Science and Business Media LLC
Date: 11-05-2020
DOI: 10.1007/S40820-020-00446-W
Abstract: This paper suggests development of a flexible, lightweight, and ultra-sensitive piezoresistive flow sensor based on vertical graphene nanosheets (VGNs) with a mazelike structure. The sensor was thoroughly characterized for steady-state and oscillatory water flow monitoring applications. The results demonstrated a high sensitivity (103.91 mV (mm/s) −1 ) and a very low-velocity detection threshold (1.127 mm s −1 ) in steady-state flow monitoring. As one of many potential applications, we demonstrated that the proposed VGNs/PDMS flow sensor can closely mimic the vestibular hair cell sensors housed inside the semicircular canals (SCCs). As a proof of concept, magnetic resonance imaging of the human inner ear was conducted to measure the dimensions of the SCCs and to develop a 3D printed lateral semicircular canal (LSCC). The sensor was embedded into the artificial LSCC and tested for various physiological movements. The obtained results indicate that the flow sensor is able to distinguish minute changes in the rotational axis physical geometry, frequency, and litude. The success of this study paves the way for extending this technology not only to vestibular organ prosthesis but also to other applications such as blood/urine flow monitoring, intravenous therapy (IV), water leakage monitoring, and unmanned underwater robots through incorporation of the appropriate packaging of devices.
Development of ultrasensitive biomimetic auditory hair cells based on piezoresistive hydrogel nanocomposites
Publisher: American Chemical Society (ACS)
Date: 13-09-2021
Abstract: With an ageing population, hearing disorders are predicted to rise considerably in the following decades. Thus, developing a new class of artificial auditory system has been highlighted as one of the most exciting research topics for biomedical applications. Herein, a design of a biocompatible piezoresistive-based artificial hair cell sensor is presented consisting of a highly flexible and conductive polyvinyl alcohol (PVA) nanocomposite with vertical graphene nanosheets (VGNs). The bilayer hydrogel sensor demonstrates excellent performance to mimic biological hair cells, responding to acoustic stimuli in the audible range between 60 Hz to 20 kHz. The sensor output demonstrates stable mid-frequency regions (∼4-9 kHz), with the greatest sensitivity as high frequencies (∼13-20 kHz). This is somewhat akin to the mammalian auditory system, which has remarkable sensitivity and sharp tuning at high frequencies due to the "active process". This work validates the PVA/VGN sensor as a potential candidate to play a similar functional role to that of the cochlear hair cells, which also operate over a wide frequency domain in a viscous environment. Further characterizations of the sensor show that increasing the sound litude results in higher responses from the sensor while taking it to the depth drops the sensor outputs due to attenuation of sound in water. Meanwhile, the acoustic pressure distribution of sound waves is predicted through finite element analysis, whereby the numerical results are in perfect agreement with experimental data. This proof-of-concept work creates a platform for the future design of susceptible, flexible biomimetic sensors to closely mimic the biological cochlea.
Design and applications of MEMS flow sensors: A review
Publisher: Elsevier BV
Date: 08-2019
High-Sensitivity 3D ZIF-8/PDA Photonic Crystal-Based Biosensor for Blood Component Recognition.
Publisher: American Chemical Society (ACS)
Date: 20-01-2021
Abstract: Optical biosensors are sensitive devices used in bioanalytics detection. Analysis of blood constituents is very important for the detection of major diseases and also performs a significant role in the diagnosis of diabetes, various cancers, and cardiovascular disorders. In this work, a three-dimensional photonic crystal-based biosensor composed of zeolitic imidazolate framework-8 (ZIF-8) nanoarrays are placed on polydopamine (PDA) coated on a silicon substrate. This sensor is designed, simulated, and evaluated for various blood components in the wavelength range of 1.1 to 1.5 μm by the finite-difference time-domain (FDTD) method. The proposed biosensor was used for 10 types of blood components such as biotin-streptavidin, bovine serum albumin (BSA), cytop, glucose (40 mg/100 mL), hemoglobin, blood plasma, Sylgard184, white blood compounds, urethane dimethacrylate, and polyacrylamide. The FDTD technique was used for the performance analysis of the biosensor. The design parameters of the radius, the lattice constant, the thickness of the ZIF-8 arrays, and the PDA layer thickness are chosen to optimize the photonic crystal structure. This study indicates that the thickness of the PDA is the most important parameter for peak wavelength value in comparison to the other physical parameters. The factors for optimizing the photonic crystal-based biosensors such as the peak wavelength value (PWV), sensitivity, full width at half-maximum (FWHM), and figure of merit (FOM) are significant in comparison with pertinent works in this field, which evaluated 171 nm/RIU, 7.62 nm, and 22.5 RIU
A 3D-printed mini-hydrocyclone for high throughput particle separation: Application to primary harvesting of microalgae
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7LC00294G
Abstract: 3D-printed hydrocyclones are low-cost microdevices which be part of a library of standardized active and passive microfluidic components, suitable for particle–liquid separation.
Recent advances in polymeric nanostructured ion selective membranes for biomedical applications.
Publisher: Elsevier BV
Date: 12-2021
Bioinspired forward osmosis hydroponic system with an efficient hollow fiber assisted nutrient delivery system
Publisher: Elsevier BV
Date: 11-2018
Biomimetic flow sensors for biomedical flow sensing in intravenous tubes
Publisher: IEEE
Date: 10-2016
Design principles of ion selective nanostructured membranes for the extraction of lithium ions
Publisher: Springer Science and Business Media LLC
Date: 19-12-2019
DOI: 10.1038/S41467-019-13648-7
Abstract: It is predicted that the continuously increasing demand for the energy-critical element of lithium will soon exceed its availability, rendering it a geopolitically significant resource. The present work critically reviews recent reports on Li + selective membranes. Particular emphasis has been placed on the basic principles of the materials’ design for the development of membranes with nanochannels and nanopores with Li + selectivity. Fundamental and practical challenges, as well as prospects for the targeted design of Li + ion-selective membranes are also presented, with the goal of inspiring future critical research efforts in this scientifically and strategically important field.
Evidence that ultrafast non-quantal transmission underlies synchronized vestibular action potential generation
Publisher: Society for Neuroscience
Date: 29-09-2023
Domino P‐µMB: A New Approach for the Sequential Immobilization of Enzymes Using Polydopamine/Polyethyleneimine Chemistry and Microfabrication
Publisher: Wiley
Date: 27-04-2020
Multiplexing slanted spiral microchannels for ultra-fast blood plasma separation
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6LC00713A
Abstract: Blood and blood products are critical components of health care.
Application of Machine Learning Algorithms to Estimate Enzyme Loading, Immobilization Yield, Activity Retention, and Reusability of Enzyme–Metal–Organic Framework Biocatalysts
Publisher: American Chemical Society (ACS)
Date: 11-2021
Upregulation of PD-L1 expression in breast cancer cells through the formation of 3D multicellular cancer aggregates under different chemical and mechanical conditions.
Publisher: Elsevier BV
Date: 12-2019
DOI: 10.1016/J.BBAMCR.2019.118526
Abstract: Expression of programmed death-ligand 1 (PD-L1) in cancer cells plays an important role in cancer-immune cell interaction. The emerging evidence suggests regulation of PD-L1 expression by several tumor microenvironmental cues. However, the association of PD-L1 expression with chemical and mechanical features of the tumor microenvironment, specifically epidermal growth factor receptor (EGFR) signaling and matrix stiffness, remains elusive. Herein, we determine whether EGFR targeting and substrate stiffness affect the regulation of PD-L1 expression. Breast carcinoma cell lines, MCF7 and MDA-MB-231, were cultured under different conditions targeting EGFR and exposing cells to distinct substrate stiffness to evaluate PD-L1 expression. Furthermore, the ability to form aggregates in short-term culture of breast carcinoma cells and its effect on expression level of PD-L1 was probed. Our results indicated that PD-L1 expression was altered in response to both EGFR inhibition and substrate stiffness. Additionally, a positive association between the formation of multicellular aggregates and PD-L1 expression was observed. MDA-MB-231 cells expressed the highest PD-L1 level on a stiff substrate, while inhibition of EGFR reduced expression of PD-L1. The results suggested that both physical and chemical features of tumor microenvironment regulate PD-L1 expression through alteration of tumor aggregate formation potential. In line with these results, the in-silico study highlighted a positive correlation between PD-L1 expression, EGFR signaling, epithelial to mesenchymal transition related transcription factors (EMT-TFs) and stemness markers in metastatic breast cancer. These findings improve our understanding of regulation of PD-L1 expression by tumor microenvironment leading to evasion of tumor cells from the immune system.
Sensitive and Flexible Polymeric Strain Sensor for Accurate Human Motion Monitoring.
Publisher: MDPI AG
Date: 02-2018
DOI: 10.3390/S18020418
Mechanobiology of Dental Pulp Stem Cells at the Interface of Aqueous-Based Fabricated ZIF8 Thin Film.
Publisher: American Chemical Society (ACS)
Date: 06-2021
Abstract: The limited knowledge on how biological systems sense and respond to the mechanical properties of metal-organic framework (MOF) thin films is a critical restriction factor for their extensive usage. To bridge this gap, we performed an
A Review on Wearable Electrospun Polymeric Piezoelectric Sensors and Energy Harvesters
Publisher: Wiley
Date: 25-10-2023
Abstract: In recent years, wearable sensors and energy harvesters have shown great potential for a wide range of applications in personalized healthcare, robotics, and human–machine interfaces. Among different types of materials used in wearable electronics, piezoelectric materials have gained enormous attention due to their exclusive ability to harvest energy from ambient sources. Piezoelectric materials can be utilized as sensing elements in wearable sensors while harvesting biomechanical energy. Electrospun piezoelectric polymer nanofibers are extensively investigated due to their high flexibility, ease of processing, biocompatibility, and higher piezoelectric property (in contrast to their corresponding cast films). However, as compared to piezoceramic materials, they mostly exhibit relatively lower piezoelectric coefficients. Therefore, considerable efforts have been devoted to improving the piezoelectricity of electrospun polymer nanofibers recently, resulting in significant advances. This review presents a broad overview of these advances including new material, structure designs as well as new strategies to enhance piezoelectricity of electrospun polymer nanofibers. The challenges in achieving high mechanical performance as well as high piezoelectricity are particularly discussed. The main motivation of this review is to examine these challenges and highlight effective approaches to achieving high‐performance piezoelectric sensors and energy harvesters for wearable technologies.
Flexible and Surface-Mountable Piezoelectric Sensor Arrays for Underwater Sensing in Marine Vehicles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2013
Resolving Learners Misunderstandings Using an Adaptive Divide and Correct Technique
Publisher: Springer Nature Switzerland
Date: 2022
Self-powered micro-sensors to improve control and maneuvering of a robotic stingray
Publisher: IEEE
Date: 11-2014
Description of ionophore-doped membranes with a blocked interface
Publisher: Elsevier BV
Date: 10-2017
Strategically Designing a Pumpless Microfluidic Device on an inert Polypropylene Substrate with Potential Application in Biosensing and Diagnostics
Publisher: American Chemical Society (ACS)
Date: 22-05-2017
DOI: 10.1021/ACS.LANGMUIR.7B00537
Abstract: This study is an attempt to make a step forward to implement the very immature concept of pumpless transportation of liquid into a real miniaturized device or lab-on-chip (LOC) on a plastic substrate. "Inert" plastic materials such as polypropylene (PP) are used in a variety of biomedical applications but their surface engineering is very challenging. Here, it was demonstrated that with a facile innovative wettability patterning route using fluorosilanized UV-independent TiO
A rapid co-culture stamping device for studying intercellular communication
Publisher: Springer Science and Business Media LLC
Date: 18-10-2016
DOI: 10.1038/SREP35618
Abstract: Regulation of tissue development and repair depends on communication between neighbouring cells. Recent advances in cell micro-contact printing and microfluidics have facilitated the in-vitro study of homotypic and heterotypic cell-cell interaction. Nonetheless, these techniques are still complicated to perform and as a result, are seldom used by biologists. We report here development of a temporarily sealed microfluidic st ing device which utilizes a novel valve design for patterning two adherent cell lines with well-defined interlacing configurations to study cell-cell interactions. We demonstrate post-st ing cell viability of %, the st ing of multiple adherent cell types, and the ability to control the seeded cell density. We also show viability, proliferation and migration of cultured cells, enabling analysis of co-culture boundary conditions on cell fate. We also developed an in-vitro model of endothelial and cardiac stem cell interactions, which are thought to regulate coronary repair after myocardial injury. The st is fabricated using microfabrication techniques, is operated with a lab pipettor and uses very low reagent volumes of 20 μl with cell injection efficiency of %. This easy-to-use device provides a general strategy for micro-patterning of multiple cell types and will be important for studying cell-cell interactions in a multitude of applications.
MEMS piezoresistive flow sensors for sleep apnea therapy
Publisher: Elsevier BV
Date: 08-2018
The selection of milling parameters by the PSO-based neural network modeling method
Publisher: Springer Science and Business Media LLC
Date: 06-04-2011
MEMS artificial canal neuromast sensor arrays for underwater sensing
Publisher: IEEE
Date: 11-2014
Smart skin of self-powered hair cell flow sensors for sensing hydrodynamic flow phenomena
Publisher: IEEE
Date: 06-2015
Sensory literacies: the full sensorium in literacy learning
Publisher: Elsevier
Date: 2023
Experimental and numerical study of elasto-inertial focusing in straight channels.
Publisher: AIP Publishing
Date: 05-2019
DOI: 10.1063/1.5093345
Abstract: Elasto-inertial microfluidics has drawn significant attention in recent years due to its enhanced capabilities compared to pure inertial systems in control of small microparticles. Previous investigations have focused mainly on the applications of elasto-inertial sorting, rather than studying its fundamentals. This is because of the complexity of simulation and analysis, due to the presence of viscoelastic force. There have been some investigative efforts on the mechanisms of elasto-inertial focusing in straight channels however, these studies were limited to simple rectangular channels and neglected the effects of geometry and flow rates on focusing positions. Herein, for the first time, we experimentally and numerically explore the effects of elasticity accompanying channel cross-sectional geometry and s le flow rates on the focusing phenomenon in elasto-inertial systems. The results reveal that increasing the aspect ratio weakens the elastic force more than inertial force, causing a transition from one focusing position to two. In addition, they show that increasing the angle of a channel corner causes the elastic force to push the particles more efficiently toward the center over a larger area of the channel cross section. Following on from this, we proposed a new complex straight channel which demonstrates a tighter focusing band compared to other channel geometries. Finally, we focused Saccharomyces cerevisiae cells (3–5 μm) in the complex channel to showcase its capability in focusing small-size particles. We believe that this research work improves the understanding of focusing mechanisms in viscoelastic solutions and provides useful insights into the design of elasto-inertial microfluidic devices.
An Intelligence Cattle Re-Identification System over Transport by Siamese Neural Networks and YOLO
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Synthesis of green benzamide-decorated UiO-66-NH2 for biomedical applications
Publisher: Elsevier BV
Date: 07-2022
DOI: 10.1016/J.CHEMOSPHERE.2022.134359
Abstract: Metal-organic frameworks (MOFs) biocompatible systems can host enzymes/bacteria/viruses. Herein we synthesized a series of fatty acid amide hydrolase (FAAH)-decorated UiO-66-NH
Harbor seal inspired MEMS artificial micro-whisker sensor
Publisher: IEEE
Date: 2014
Optimum surface roughness prediction in face milling X20Cr13 using particle swarm optimization algorithm
Publisher: SAGE Publications
Date: 19-05-2010
Abstract: This paper presents an approach to the determination of the optimal cutting parameters to create minimum surface roughness levels in the face milling of X20Cr13 stainless steel. The proposed approach is to use a particle swarm optimization (PSO)-based neural network to create a predictive model for the surface roughness level that is based on experimental data collected on X20Cr13. The optimization problem is then solved using a PSO-based neural network for optimization system (PSONNOS). A good agreement is observed between the predicted surface roughness values and those obtained in experimental measurements performed using the predicted optimal machine settings. The PSONNOS is compared to the genetic algorithm optimized neural network system (GONNS).
Steering of beam using cylindrical arrangements in a metallic parallel plates structure operating over Ku-band
Publisher: MDPI AG
Date: 15-06-2022
DOI: 10.3390/APP12126074
Abstract: A novel flat beam steering prototype based on the specific arrangement of a cylindrical unit cell is designed, manufactured and tested. The wideband and broad scanning capability is demonstrated at the Ku-band. We have considered two configurations, first with circular rings (CR) of the defined permittivity values for respective radial distance from the center of the aperture, second with cylindrical rods that shall be placed on a respective CR, which mimics the defined permittivity. The structure is generated from Vero CMYK full color wax, which utilizes the Multijet 3D printing method. The proposed prototype is designed in the operating frequency of 12 GHz (λ = 25 mm) and separation distance between the two parallel plates are maintained at 12.5 mm (0.5λ) for the TE10 mode of operation. The diameter of the two parallel plates and the proposed structure is of 100 mm (4λ) where the radius of cylinders varies from 0.5 to 3.5 mm and corresponding relative permittivity varies from 0.6687 to 2.4395. The overall height of the structure is 12.5 mm and is placed between two parallel plates. The minimum separation distance is maintained between the proposed structure and the feed WR-75 waveguide. Irises effect is performed to obtain impedance matching in the operating frequency bands. Beam steering of the radiated waves is observed for relative rotation angles of 0∘, 30∘, 45∘, 75∘ and 90∘ of the WR-75 waveguide along the edge of parallel plates. The overall proposed system weighs 179 g, which signifies the light weight characteristics. Moreover, the proposed structure shows low return loss over 10 GHz to 15 GHz operating frequency band.
Runoff and leaching of dissolved phosphorus in streams from a rainfed mixed cropping and grazing catchment under a Mediterranean climate in Australia
Publisher: Elsevier BV
Date: 06-2021
Using particle swarm optimization based neural network for modeling of thrust force drilling of PA-6/ Nanoclay Nanocomposites
Publisher: Trans Tech Publications, Ltd.
Date: 10-2010
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.34-35.722
Abstract: This paper presents a newly approach for modeling thrust force in drilling of PA-6/ Nanoclay Nanocomposites materials, by using Particle Swarm Optimization based Neural Network (PSONN). In this regard, advantages of statistical experimental algorithm technique, experimental measurements, particle swarm optimization and artificial neural network are exploited in an integrated manner. For this purpose, numerous experiments for PA-6 and PA-6/ Nanoclay Nanocomposites are conducted to obtain thrust force values by using drill of high speed steel with point angles and 2mm in diameter. Then, a predictive model for thrust force is created by using PSONN algorithm. Also, the training capacity of PSONN is compared to that of the conventional neural network. The results indicate that nanoclay content on PA-6 polyamide significantly decrease the thrust force. Also, the obtained results for modeling of thrust force have shown very good training capacity of the proposed PSONN algorithm with compared to that of a conventional neural network (BPNN).
Test boredom: Exploring a neglected emotion.
Publisher: American Psychological Association (APA)
Date: 10-2023
DOI: 10.1037/EDU0000807
Rare Earth Elements Recovery Using Selective Membranes via Extraction and Rejection
Publisher: MDPI AG
Date: 11-01-2022
DOI: 10.3390/MEMBRANES12010080
Abstract: Recently, demands for raw materials like rare earth elements (REEs) have increased considerably due to their high potential applications in modern industry. Additionally, REEs’ similar chemical and physical properties caused their separation to be difficult. Numerous strategies for REEs separation such as precipitation, adsorption and solvent extraction have been applied. However, these strategies have various disadvantages such as low selectivity and purity of desired elements, high cost, vast consumption of chemicals and creation of many pollutions due to remaining large amounts of acidic and alkaline wastes. Membrane separation technology (MST), as an environmentally friendly approach, has recently attracted much attention for the extraction of REEs. The separation of REEs by membranes usually occurs through three mechanisms: (1) complexation of REE ions with extractant that is embedded in the membrane matrix, (2) adsorption of REE ions on the surface created-active sites on the membrane and (3) the rejection of REE ions or REEs complex with organic materials from the membrane. In this review, we investigated the effect of these mechanisms on the selectivity and efficiency of the membrane separation process. Finally, potential directions for future studies were recommended at the end of the review.
Preparation of Iridescent 2D Photonic Crystals by Using a Mussel-Inspired Spatial Patterning of ZIF-8 with Potential Applications in Optical Switch and Chemical Sensor
Publisher: American Chemical Society (ACS)
Date: 19-10-2017
Abstract: In this work, spatial patterning of a thin, dense, zeolitic imidazolate framework (ZIF-8) pattern was generated using photolithography and nanoscale (60 nm) dopamine coating. A bioinspired, unique, reversible, two-color iridescent pattern can be easily obtained for potential applications in sensing and photonics.
Heterogeneous asymmetric passable cavities within graphene oxide nanochannels for highly efficient lithium sieving
Publisher: Elsevier BV
Date: 09-2022
Characterization of single polyvinylidene fluoride (PVDF) nanofiber for flow sensing applications
Publisher: AIP Publishing
Date: 10-2017
DOI: 10.1063/1.4994968
Abstract: The use of Polyvinylidene Fluoride (PVDF) based piezoelectric nanofibers for sensing and actuation has been reported widely in the past. However, in most cases, PVDF piezoelectric nanofiber mats have been used for sensing applications. This work fundamentally characterizes a single electrospun PVDF nanofiber and demonstrates its application as a sensing element for nanoelectromechanical sensors (NEMS). PVDF nanofiber mats were spun by far field electrospinning (FFES) process and complete material characterization was conducted by means of scanning electron microscope (SEM) imaging, Raman Spectroscopy and FTIR spectroscopy. An optimized recipe was developed for spinning a single suspended nanofiber on a specially designed MEMS substrate which allows the nano-mechanical and electrical characterization of a single PVDF nanofiber. Electrical characterization is conducted using a single suspended nanofiber to determine the piezoelectric coefficient (d33) of the nanofiber to be -58.77 pm/V. Also the mechanical characterization conducted using a nanoindenter revealed a Young’s Modulus and hardness of 2.2 GPa and 0.1 GPa respectively. Finally, an application that utilizes the single PVDF nanofiber as a sensing element to form a NEMS flow sensor is demonstrated. The single nanofiber flow sensor is tested in presence of various oscillatory flow conditions.
Recent Advances in Nanomaterials Development for Nanomedicine and Cancer.
Publisher: American Chemical Society (ACS)
Date: 19-07-2021
Abstract: Cancer is considered one of the leading causes of death, with a growing number of cases worldwide. However, the early diagnosis and efficient therapy of cancer have remained a critical challenge. The emergence of nanomedicine has opened up a promising window to address the drawbacks of cancer detection and treatment. A wide range of engineered nanomaterials and nanoplatforms with different shapes, sizes, and composition has been developed for various biomedical applications. Nanomaterials have been increasingly used in various applications in bioimaging, diagnosis, and therapy of cancers. Recently, numerous multifunctional and smart nanoparticles with the ability of simultaneous diagnosis and targeted cancer therapy have been reported. The multidisciplinary attempts led to the development of several exciting clinically approved nanotherapeutics. The nanobased materials and devices have also been used extensively to develop point-of-care and highly sensitive methods of cancer detection. In this review article, the most significant achievements and latest advances in the nanomaterials development for cancer nanomedicine are critically discussed. In addition, the future perspectives of this field are evaluated.
Metal-Organic-Framework-Based Enzymatic Microfluidic Biosensor via Surface Patterning and Biomineralization
Publisher: American Chemical Society (ACS)
Date: 07-12-2019
Abstract: Recently, the biomineralization of enzyme in metal-organic-framework (enzyme-MOF) composite have shown a great potential to increase enzymes stability without compromising their activity hence, it is desirable for its applications in biosensing devices. Nonetheless, most of the enzyme-MOF research has been focusing on enzyme encapsulation in particle form, which limits its synthesis flexibility for practical applications because of its requirement for postsynthesis immobilization onto solid support. Therefore, to develop a diagnostic device out of the biomineralized enzyme, surface patterning and integration of microfluidic system offers many advantages. In this work, mussel-inspired polydopamine olyethyleneimine (PDA/PEI) coating is employed to pattern enzyme-MOF in microfluidic channels and exploit the wettability gradient for "pumpless transportation" effect. As a proof of concept, we combine a cascade reaction of glucose oxidase (GOx) and horseradish peroxidase (HRP) enzymes to detect glucose into a patterned zeolitic imidazole framework-8 (ZIF-8) thin film on a flexible polymeric substrate. The results show that the ZIF-8/GOx&HRP in situ composites on PDA/PEI patterns have good acid and thermal stability compared with s les without ZIF-8. ZIF-8/GOx&HRP in situ shows high selectivity toward glucose, linear sensitivity of 0.00303 Abs/μM, and the limit of detection of 8 μM glucose concentration. An unexpected benefit of this approach is the ability of the ZIF-8 thin-film structure to provide a diffusion limiting effect for substrate influx, thus, producing high range of linear response range (8 μM to 5 mM of glucose). This work provides insights into the spatial location of the enzymes in MOF thin films and the potential of such patterning techniques for MOF-based biosensors using other types of biological elements such as antibodies and aptamers.
Using advanced 2D materials to closely mimic vestibular hair cell sensors
Publisher: IEEE
Date: 20-06-2021
Biosensors for wastewater monitoring: A review
Publisher: Elsevier BV
Date: 10-2018
DOI: 10.1016/J.BIOS.2018.07.019
Abstract: Water pollution and habitat degradation are the cause of increasing water scarcity and decline in aquatic bio ersity. While the freshwater availability has been declining through past decades, water demand has continued to increase particularly in areas with arid and semi-arid climate. Monitoring of pollutants in wastewater effluents are critical to identifying water pollution area for treatment. Conventional detection methods are not effective in tracing multiple harmful components in wastewater due to their variability along different times and sources. Currently, the development of biosensing instruments attracted significant attention because of their high sensitivity, selectivity, reliability, simplicity, low-cost and real-time response. This paper provides a general overview on reported biosensors, which have been applied for the recognition of important organic chemicals, heavy metals, and microorganisms in dark waters. The significance and successes of nanotechnology in the field of biomolecular detection are also reviewed. The commercially available biosensors and their main challenges in wastewater monitoring are finally discussed.
Polymeric piezoresistive airflow sensor to monitor respiratory patterns
Publisher: The Royal Society
Date: 12-2021
Abstract: Monitoring human respiratory patterns is of great importance as it gives essential information for various medical conditions, e.g. sleep apnoea syndrome and chronic obstructive pulmonary disease and asthma, etc. Herein, we have developed a polymeric airflow sensor based on nanocomposites of vertically grown graphene nanosheets (VGNs) with polydimethylsiloxane (PDMS) and explored their applications in monitoring human respiration. The sensing performance of the VGNs/PDMS nanocomposite was characterized by exposing to a range of airflow rates (20–130 l min −1 ), and a linear performance with high sensitivity and low response time (mostly below 1 s) was observed. To evaluate the experimental results, finite-element simulation models were developed in the COMSOL Multiphysics package. The piezoresistive properties of VGNs/PDMS thin film and fluid–solid interaction were thoroughly studied. Laser Doppler vibrometry measures of sensor tip displacement closely approximated simulated deflection results and validated the dynamic response of the sensor. By comparing the proposed sensor and some other airflow sensors in the literature, it is concluded that the VGNs/PDMS airflow sensor has excellent features in terms of sensor height, detection range and sensitivity. The potential application of the VGNs/PDMS airflow sensor in detecting the respiration pattern of human exercises like walking, jogging and running has been demonstrated.
Potential nanotechnology-based diagnostic and therapeutic approaches for Meniere's disease
Publisher: Elsevier BV
Date: 11-2022
DOI: 10.1016/J.NANO.2022.102599
Abstract: Meniere's disease (MD) is a progressive inner ear disorder involving recurrent and prolonged episodes or attacks of vertigo with associated symptoms, resulting in a significantly reduced quality of life for sufferers. In most cases, MD starts in one ear however, in one-third of patients, the disorder progresses to the other ear. Unfortunately, the etiology of the disease is unknown, making the development of effective treatments difficult. Nanomaterials, including nanoparticles (NPs) and nanocarriers, offer an array of novel diagnostic and therapeutic applications related to MD. NPs have specific features such as biocompatibility, biochemical stability, targetability, and enhanced visualization using imaging tools. This paper provides a comprehensive and critical review of recent advancements in nanotechnology-based diagnostic and therapeutic approaches for MD. Furthermore, the crucial challenges adversely affecting the use of nanoparticles to treat middle ear disorders are investigated. Finally, this paper provides recommendations and future directions for improving the performances of nanomaterials on theragnostic applications of MD.
A Horn Antenna Covered with a 3D-Printed Metasurface for Gain Enhancement
Publisher: MDPI AG
Date: 08-01-2021
DOI: 10.3390/ELECTRONICS10020119
Abstract: A simple metasurface integrated with horn antenna exhibiting wide bandwidth, covering full Ku-band using 3D printing is presented. It consists of a 3D-printed horn and a 3D-printed phase transformation surface placed at the horn aperture. Considering the non-uniform wavefront of 3D printed horn, the proposed 3D-printed phase transformation surface is configured by unit cells, consisting of a cube in the centre which is supported by perpendicular cylindrical rods from its sides. Placement of proposed surface helps to improve the field over the horn aperture, resulting in lower phase variations. Both simulated and measured results show good radiation characteristics with lower side lobe levels in both E- and H-planes. Additionally, there is an overall increment in directivity with peak measured directivity up to 24.8 dBi and improvement in aperture efficiency of about 35% to 72% in the frequency range from 10–18 GHz. The total weight of the proposed antenna is about 345.37 g, which is significantly light weight. Moreover, it is a low cost and raid manufacturing solution using 3D printing technology.
Porous metal–organic framework-based filters: Synthesis methods and applications for environmental remediation
Publisher: Elsevier BV
Date: 02-2022
Biomechanical canal sensors inspired by canal neuromasts for ultrasensitive flow sensing
Publisher: IEEE
Date: 2015
Performance analysisis of PZT (0.52/0.48) for high temperature and pressure sensing applications
Publisher: IEEE
Date: 06-2013
Lithium ion-selective membrane with 2D subnanometer channels
Publisher: Elsevier BV
Date: 08-2019
DOI: 10.1016/J.WATRES.2019.05.018
Abstract: In the last two years, the rapidly rising demand for lithium has exceeded supply, resulting in a sharp increase in the price of the metal. Conventional electric driven membrane processes can separate Li
Generation of Beam Tilt through Three-Dimensional Printed Surface
Publisher: MDPI AG
Date: 20-12-2021
DOI: 10.3390/ELECTRONICS10243174
Abstract: In this paper, 3D printed surfaces are presented to study this technology’s application in generating beam tilt for the electromagnetic waves in the Ku-band. Additionally, the input source is maintained by a feed horn that is additively manufactured and is coated with copper spray paint to add conductivity, which is fed by a WR-75 waveguide. The proposed beam tilt generating surface is also referred to as a Beam Deviating Surface (BDS). There is no relative gap between the BDS and the aperture of the horn, which eventually decreased the overall antenna height. The BDS layer is able to deviate the beam for a fixed elevation angle of 22.5∘ and could be consequently rotated along with the rotation of the BDS prototype. The voltage standing wave ratio value is less than two over the operating frequency range, which depicts the wideband behavior. The measured and simulated radiation patterns show that we can tilt the electromagnetic waves in ranges of up to +/−22.5∘ with a minimum side lobe level of −5 dB at frequencies from 10 to 15 GHz. This signifies the wideband characteristic of the proposed prototype, which is achieved by Vero material from Multijet Printing that is a low-cost and rapid manufacturing 3D printing technology.
Bioinspired Angstrom-Scale Heterogeneous MOF-on-MOF Membrane for Osmotic Energy Harvesting
Publisher: American Chemical Society (ACS)
Date: 22-06-2023
Rod-like mesoporous silica nanoparticles with rough surfaces for enhanced cellular delivery
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TB21431A
Polydopamine surface modification with UV-shielding effect using KMnO4 as an efficient oxidizing agent
Publisher: Elsevier BV
Date: 12-2018
Fabrication of unconventional inertial microfluidic channels using wax 3D printing.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9SM02067E
Abstract: A novel workflow for the fabrication of inertial microfluidic devices based on the wax 3D printing method.
The effect of D-spacing on the ion selectivity performance of MXene membrane
Publisher: Elsevier BV
Date: 12-2021
An easily fabricated three-dimensional threaded lemniscate-shaped micromixer for a wide range of flow rates
Publisher: AIP Publishing
Date: 2017
DOI: 10.1063/1.4974904
Abstract: Mixing fluid s les or reactants is a paramount function in the fields of micro total analysis system (μTAS) and microchemical processing. However, rapid and efficient fluid mixing is difficult to achieve inside microchannels because of the difficulty of diffusive mass transfer in the laminar regime of the typical microfluidic flows. It has been well recorded that the mixing efficiency can be boosted by migrating from two-dimensional (2D) to three-dimensional (3D) geometries. Although several 3D chaotic mixers have been designed, most of them offer a high mixing efficiency only in a very limited range of Reynolds numbers (Re). In this work, we developed a 3D fine-threaded lemniscate-shaped micromixer whose maximum numerical and empirical efficiency is around 97% and 93%, respectively, and maintains its high performance (i.e., & %) over a wide range of 1 & Re & 1000 which meets the requirements of both the μTAS and microchemical process applications. The 3D micromixer was designed based on two distinct mixing strategies, namely, the inducing of chaotic advection by the presence of Dean flow and diffusive mixing through thread-like grooves around the curved body of the mixers. First, a set of numerical simulations was performed to study the physics of the flow and to determine the essential geometrical parameters of the mixers. Second, a simple and cost-effective method was exploited to fabricate the convoluted structure of the micromixers through the removal of a 3D-printed wax structure from a block of cured polydimethylsiloxane. Finally, the fabricated mixers with different threads were tested using a fluorescent microscope demonstrating a good agreement with the results of the numerical simulation. We envisage that the strategy used in this work would expand the scope of the micromixer technology by broadening the range of efficient working flow rate and providing an easy way to the fabrication of 3D convoluted microstructures.
Miniaturized Wideband Antenna Prototype Operating over the Ku-Band
Publisher: MDPI AG
Date: 19-03-2022
DOI: 10.3390/MI13030471
Abstract: A wideband antenna is proposed based on three-dimensional printing technology. The antenna was designed using the PREPERM 10 material, with permittivity ϵr = 10, where the overall height of the proposed prototype was maintained as 12.83 mm (0.51λ), having a lateral dimension of 60 mm × 60 mm, at an operating frequency of 12 GHz (λ = 25 mm). The proposed antenna achieved a wide frequency bandwidth with a voltage standing-wave ratio (VSWR) of less than two, from 10 GHz to 15 GHz in the Ku-band, where the maximum directivity was 20 dBi over a reflection coefficient bandwidth of 50%. It showed a miniaturized non-uniform metasurface of 2.4λ × 2.4λ × 0.51λ that was placed at 16.5 mm (0.66λ) above the ground plane, which was 2.4λ × 2.4λ × 0.04λ in dimension. Thus, the overall height of the proposed antenna system from the feed source was 29.33 mm (1.17λ). The total weight of the system including the designed structures made of PREPERM 10 and ABS with copper-painted prototypes was 96 g and 79 g, respectively. The measured results were consistent with the simulated results, demonstrating the feasibility and effectiveness of the proposed method.
Palladium nanoparticles decorated Chitosan-Pectin modified Kaolin
Publisher: Elsevier BV
Date: 07-2022
UiO-66-(COONa)2 membrane with programmable ionic channels for lithium ion-selective transport
Publisher: Elsevier BV
Date: 03-2023
Radiation Characteristics of Three Dimensional Printed Meta-surface in Broadside Condition
Publisher: IEEE
Date: 31-10-2022
Green porous benzamide-like nanomembranes for hazardous cations detection, separation, and concentration adjustment
Publisher: Elsevier BV
Date: 02-2022
DOI: 10.1016/J.JHAZMAT.2021.127130
Abstract: Green biomaterials play a crucial role in the diagnosis and treatment of diseases as well as health-related problem-solving. Typically, biocompatibility, biodegradability, and mechanical strength are requirements centered on biomaterial engineering. However, in-hospital therapeutics require an elaborated synthesis of hybrid and complex nanomaterials capable of mimicking cellular behavior. Accumulation of hazardous cations like K
A Hybrid Design Technique for Realizing Metasurface based Wideband and Wide Dual-Band Circularly Polarized Dielectric Resonator Antennas
Publisher: IEEE
Date: 29-05-2022
A multi-layer Partially Reflecting Surface Antenna for cost-effective 3D printing manufacturing
Publisher: IEEE
Date: 05-07-2020
Engineered Biomimetic Membranes for Organ-on-a-Chip.
Publisher: American Chemical Society (ACS)
Date: 08-11-2022
DOI: 10.1021/ACSBIOMATERIALS.2C00531
Abstract: Organ-on-a-chip (OOC) systems are engineered nanobiosystems to mimic the physiochemical environment of a specific organ in the body. Among various components of OOC systems, biomimetic membranes have been regarded as one of the most important key components to develop controllable biomimetic bioanalysis systems. Here, we review the preparation and characterization of biomimetic membranes in comparison with the features of the extracellular matrix. After that, we review and discuss the latest applications of engineered biomimetic membranes to fabricate various organs on a chip, such as liver, kidney, intestine, lung, skin, heart, vasculature and blood vessels, brain, and multiorgans with perspectives for further biomedical applications.
Mist harvesting using bioinspired polydopamine coating and microfabrication technology
Publisher: Elsevier BV
Date: 03-2018
Biomimetic locomotion for a robotic stingray using MEMS sensors
Publisher: IEEE
Date: 06-2015
Luminescent film: Biofouling investigation of tetraphenylethylene blended polyethersulfone ultrafiltration membrane
Publisher: Elsevier BV
Date: 03-2021
Incorporation of Natural Lithium‐Ion Trappers into Graphene Oxide Nanosheets
Publisher: Wiley
Date: 05-10-2020
Abstract: Lithium consumption is estimated to face a considerable rise in the next decade thus, finding new reproducible lithium resources such as brine deposits and seawater has become a fast‐growing research topic. However, Li + extraction from these resources is challenging due to its low concentration and presence of other monovalent cations exhibiting identical chemical properties. Here, it is discovered that tannic acid (TA) inside graphene oxide (GO) nanochannel acts as natural ion trapper, which possesses lithiophilic elements. The lithium‐rich feed is achieved by using the potential‐driven TA‐GO membrane by excluding lithium ions from other monovalent cations. The results showed that the ion trapping capability of inexpensive TA‐GO membrane is Li + Na + K + with Li trapping energy of − 593 KJ mol −1 , respectively, where its trapping efficiency goes into a top rank among their expensive synthetic counterparts. Evaluating the combined effect of three key parameters, including barrier energy, hydration energy, and binding energy illustrates that required energy to transport Li‐ion through the membrane is higher than that for other monovalent. This proof‐of‐concept work opens up an avenue of research for designing a new class of ion‐selective membranes, based on the incorporation of naturally low cost available lithiophilic guest molecules into 2D membranes.
A lithium ion selective membrane synthesized from a double layered Zr-based metal-organic framework (MOF-on-MOF) thin film
Publisher: Elsevier BV
Date: 06-2022
Green and Sustainable Membranes: A review
Publisher: Elsevier BV
Date: 08-2023
Biomimetic polymer MEMS haircells with high-aspect ratio for high accuracy flow sensing
Publisher: IEEE
Date: 06-2013
Evidence that ultrafast non-quantal transmission underlies short-latency vestibular evoked potentials
Publisher: Cold Spring Harbor Laboratory
Date: 17-05-2023
DOI: 10.1101/2023.05.15.540767
Abstract: Amniotes evolved a unique calyceal postsynaptic terminal in the vestibular organs of the inner ear that underpins quantal and non-quantal transmission at the synapse of sensory hair cells and vestibular afferent neurons. The non-quantal component is of particular interest as it includes an ultrafast synaptic current thought to underlie the exquisite synchronization of action potentials in vestibular afferent fibres to dynamic stimuli such as sound and vibration. Here we demonstrate evidence that non-quantal transmission is responsible for short latency vestibular evoked potentials (vCAPs) in the guinea pig utricle. We first show that, unlike auditory nerve responses which are completely abolished, vCAPs are insensitive to local administration of the AMPA receptor agonist CNQX. Moreover, latency comparisons between presynaptic hair cell and postsynaptic neural responses reveal that the vCAP occurs without measurable synaptic delay. Finally, using a paired-pulse stimulus designed to deplete the readily releasable pool of synaptic vesicles in hair cells, we reveal that forward masking is lacking in vestibular responses, compared to the equivalent cochlear responses. Our data support the hypothesis that the fast component of non-quantal transmission at calyceal synapses is indefatigable and responsible for ultrafast responses of vestibular organs evoked by transient stimulation. The mammalian vestibular system drives some of the fastest reflex pathways in the nervous system, ensuring stable gaze and postural control for locomotion on land. To achieve this, terrestrial amniotes evolved a large, unique calyx afferent terminal which completely envelopes one or more pre-synaptic vestibular hair cells, which transmits mechanosensory signals mediated by quantal and nonquantal (NQ) synaptic transmission. We present several lines of data in the guinea pig that reveal the pre-synaptic transmission of the most sensitive vestibular afferents are faster than their auditory nerve counterparts. Here, we present neurophysiological and pharmacological evidence that this vestibular speed advantage arises from ultrafast NQ electrical synaptic transmission from Type I hair cells to their calyx partners.
Biocompatible and highly stretchable PVA/AgNWs hydrogel strain sensors for human motion detection
Publisher: Wiley
Date: 06-09-2020
Effect of chemistry and geometry of GO nanochannels on the Li ion selectivity and recovery
Publisher: Elsevier BV
Date: 12-2020
Biomimetic hydrogel cupula for canal neuromasts inspired sensors
Publisher: IEEE
Date: 10-2016
Dryland communities find little refuge from grazing due to long-term changes in water availability
Publisher: Elsevier BV
Date: 05-2020
Rapid Softlithography Using 3D-Printed Molds
Publisher: Wiley
Date: 12-08-2019
Myoelectric control of a biomimetic robotic hand using deep learning artificial neural network for gesture classification
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2022
A hybrid micromixer with planar mixing units
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8RA05763J
Abstract: Taguchi-optimized “hybrid micromixer” has been proposed which can be utilized in a wide range of chemical and biological applications.
Multilayered electrospun/electrosprayed polyvinylidene fluoride+zinc oxide nanofiber mats with enhanced piezoelectricity
Publisher: Wiley
Date: 15-02-2023
Abstract: Electrospun polyvinylidene fluoride (PVDF) nanofibers have been widely used in the fabrication of flexible piezoelectric sensors and nanogenerators, due to their excellent mechanical properties. However, their relatively low piezoelectricity is still a critical issue. Herein, a new and effective route to enhance the piezoelectricity of PVDF nanofiber mats by electrospraying zinc oxide (ZnO) nanoparticles between layers of PVDF nanofibers is demonstrated. As compared to the conventional way of dispersing ZnO nanoparticles into PVDF solution for electrospinning nanofiber mats, this approach results in multilayered PVDF+ZnO nanofiber mats with significantly increased piezoelectricity. For ex le, 6.2 times higher output is achieved when 100% of ZnO (relative to PVDF quantity) is electrosprayed between PVDF nanofibers. Moreover, this new method enables higher loading of ZnO without having processing challenges and the maximum peak voltage of ≈3 V is achieved, when ZnO content increases up to 150%. Additionally, it is shown that the s les with equal amount of material but consisting of different number of layers have no significant difference. This work demonstrates that the proposed multilayer design provides an alternative strategy to enhance the piezoelectricity of PVDF nanofibers, which can be readily scaled up for mass production.
Advances in printable devices for biomedical applications
Publisher: IOP Publishing
Date: 12-2021
Ca2+ detection utilising AlGaN/GaN transistors with ion-selective polymer membranes
Publisher: Elsevier BV
Date: 09-2017
DOI: 10.1016/J.ACA.2017.07.066
Abstract: We demonstrate highly selective and sensitive potentiometric ion sensors for calcium ion detection, operated without the use of a reference electrode. The sensors consist of AlGaN/GaN heterostructure-based transistor devices with chemical functionalisation of the gate area using poly (vinylchloride)-based (PVC) membranes having high selectivity towards calcium ions, Ca
An Accurate PSO-GA Based Neural Network to Model Growth of Carbon Nanotubes
Publisher: Hindawi Limited
Date: 2017
DOI: 10.1155/2017/9702384
Abstract: By combining particle swarm optimization (PSO) and genetic algorithms (GA) this paper offers an innovative algorithm to train artificial neural networks (ANNs) for the purpose of calculating the experimental growth parameters of CNTs. The paper explores experimentally obtaining data to train ANNs, as a method to reduce simulation time while ensuring the precision of formal physics models. The results are compared with conventional particle swarm optimization based neural network (CPSONN) and Levenberg–Marquardt (LM) techniques. The results show that PSOGANN can be successfully utilized for modeling the experimental parameters that are critical for the growth of CNTs.
Low-power energy harvester from constructed wetland-microbial fuel cells for initiating a self-sustainable treatment process
Publisher: Elsevier BV
Date: 08-2021
Printed Planar Antenna for 28GHz 5G Millimeter Wave Applications
Publisher: IEEE
Date: 10-07-2022
Fabrication of tubular ceramic membranes as low-cost adsorbent using natural clay for heavy metals removal
Publisher: Elsevier BV
Date: 10-2022
Human reliability assessment for complex physical operations in harsh operating conditions
Publisher: Elsevier BV
Date: 08-2020
Recent Advances In the development of enzymatic paper-based microfluidic biosensors
Publisher: Elsevier BV
Date: 04-2023
Recent progress in sensing nitrate, nitrite, phosphate, and ammonium in aquatic environment
Publisher: Elsevier BV
Date: 11-2020
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View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE190100130
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