ORCID Profile
0000-0002-4961-6055
Current Organisation
RMIT University
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Publisher: Elsevier BV
Date: 12-2018
Publisher: American Chemical Society (ACS)
Date: 08-12-2022
DOI: 10.1021/ACSSENSORS.1C01633
Abstract: Nicotine, an addictive substance in tobacco products and electronic cigarettes (e-cigs), is recognized for increasing the risk of cardiovascular and respiratory disorders. Careful real-time monitoring of nicotine exposure is critical in alleviating the potential health impacts of not just smokers but also those exposed to second-hand and third-hand smoke. Monitoring of nicotine requires suitable sensing material to detect nicotine selectively and testing under free-living conditions in the standard environment. Here, we experimentally demonstrate a vanadium dioxide (VO
Publisher: Wiley
Date: 04-12-2023
Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) biosensors have captured more attention than the conventional methodologies for SARS‐CoV‐2 detection due to having cost‐effective platforms and fast detection. However, these reported SARS‐CoV‐2 biosensors suffer from drawbacks including issues in detection sensitivity, degradation of biomaterials on the sensor's surface, and incapability to reuse the biosensors. To overcome these shortcomings, molecularly imprinted polymer nanoparticles (nanoMIPs) incorporated conductometric biosensor for highly accurate, rapid, and selective detection of two model SARS‐CoV‐2 proteins: (i) receptor binding domain (RBD) of the spike ( S ) glycoprotein and (ii) full length trimeric spike protein are introduced. In addition, these biosensors successfully responded to several other SARS‐CoV‐2 RBD spike protein variants including Alpha, Beta, Gamma, and Delta. Our conductometric biosensor selectively detects the two model proteins and SARS‐CoV‐2 RBD spike protein variant s les in real‐time with sensitivity to a detection limit of 7 pg mL –1 within 10 min of s le incubation. A battery‐free, wireless near‐field communication (NFC) interface is incorporated with the biosensor for fast and contactless detection of SARS‐CoV‐2 variants. The smartphone enabled real‐time detection and on‐screen rapid result for SARS‐CoV‐2 variants can curve the outbreak due to its ability to alert the user to infection in real time.
Publisher: Wiley
Date: 17-07-2019
Publisher: IOP Publishing
Date: 11-07-2013
Publisher: Springer Science and Business Media LLC
Date: 10-07-2020
DOI: 10.1038/S41467-020-17296-0
Abstract: The predicted strong piezoelectricity for monolayers of group IV monochalcogenides, together with their inherent flexibility, makes them likely candidates for developing flexible nanogenerators. Within this group, SnS is a potential choice for such nanogenerators due to its favourable semiconducting properties. To date, access to large-area and highly crystalline monolayer SnS has been challenging due to the presence of strong inter-layer interactions by the lone-pair electrons of S. Here we report single crystal across-the-plane and large-area monolayer SnS synthesis using a liquid metal-based technique. The characterisations confirm the formation of atomically thin SnS with a remarkable carrier mobility of ~35 cm 2 V −1 s −1 and piezoelectric coefficient of ~26 pm V −1 . Piezoelectric nanogenerators fabricated using the SnS monolayers demonstrate a peak output voltage of ~150 mV at 0.7% strain. The stable and flexible monolayer SnS can be implemented into a variety of systems for efficient energy harvesting.
Publisher: Wiley
Date: 18-03-2021
Abstract: Resistance switching devices are potential candidates for future memory applications. However, sneak‐path current issues in crossbar array cause energy and heat dissipation, and it requires additional circuitry for mitigation. To address this, we introduce a hybrid device with functional oxide as bilayer of amorphous strontium titanium oxide ( a ‐STO) and vanadium oxide ( a ‐VO x ). High‐performance resistive switching material a ‐STO is coupled with a ‐VO x having fast apolar threshold switching. The hybrid device gives performance equivalent to conventional one resistance switch and one selector architecture with stability of 6000 endurance cycles. Non‐linearity factor of the hybrid device is 4.8, which is slightly higher than only a ‐STO device of 4.7. Using I – V measurements, readout margin is calculated, which suggests integration into 10 4 × 10 4 array when 10% readout margin is considered at switching ratio of 8. Further, the selector effect using non‐zero‐crossing property of memristors, which reveals six times reduction in OFF current in the hybrid device, is quantified. Compositional analysis along the device cross‐section to understand elemental distribution and interface effects of two unique, multifaceted oxides is presented. As such, in the hybrid structure non‐linearity factor remains nearly constant, while the absolute value of non‐zero‐crossing current is reduced six times, which can reduce the overall sneak current in crossbars.
Publisher: Wiley
Date: 14-07-2022
Abstract: Wide bandgap semiconducting oxides are emerging as potential 2D materials for transparent electronics and optoelectronics. This fuels the quest for discovering new 2D metal oxides with ultrahigh transparency and high mobility. While the former can be achieved by reducing the thickness of oxide films to only a few nanometers, the latter is more commonly realized by intentional doping. This article reports a one‐step synthesis of few‐unit‐cell‐thick and laterally large antimony‐doped indium oxide (IAO). The doping process occurs spontaneously when the oxide is grown on the surface of a molten Sb–In alloy and 2D IAO nanosheets can be easily printed onto desired substrates. With thicknesses at the atomic scale, these materials exhibit excellent transparency exceeding 98% across the visible and near‐infrared range. Field‐effect transistors based on low‐doped IAO nanosheets reveal a high electron mobility of ≈40 cm 2 V −1 s −1 . Additionally, a notable photoresponse is observed in 2D IAO‐based photodetectors under ultraviolet (UV) radiation. Photoresponsivities of low‐doped and highly doped IAO at a wavelength of 285 nm are found to be 1.2 × 10 3 and 0.7 × 10 3 A W −1 , respectively, identifying these materials as promising candidates for the fabrication of high‐performance optoelectronics in the UV region.
Publisher: Springer Science and Business Media LLC
Date: 24-01-2020
Publisher: American Chemical Society (ACS)
Date: 24-01-2020
Abstract: Multifunctional electronic memories capable of demonstrating both analog and digital switching on-demand are extremely attractive for miniaturization of electronics without significant drain on energy consumption. Simultaneously translating functionality onto mechanically conformable platforms will further enhance their suitability. Here, we demonstrate the ability to engineer multifunctionality in strontium titanate (STO)-based resistive random-access memories (ReRAM) on a flexible polyimide platform. By utilizing different bottom electrodes of various work functions while the top electrode is fixed, differential work functions are induced in STO, to induce bipolar or complementary switching behaviors whenever required. This work-function difference-induced bifunctional switching on the flexible platform reveals a streamlined route for achieving flexible artificial neural networks, high density integration, and logic operation using a single ReRAM.
Publisher: Elsevier BV
Date: 12-2013
Publisher: Wiley
Date: 07-09-2023
Publisher: IEEE
Date: 02-2017
Publisher: IOP Publishing
Date: 26-11-2012
Publisher: American Chemical Society (ACS)
Date: 26-01-0001
Publisher: IEEE
Date: 12-2016
Publisher: Springer International Publishing
Date: 12-2018
Publisher: American Chemical Society (ACS)
Date: 27-11-2018
Publisher: Wiley
Date: 09-2020
Publisher: Elsevier BV
Date: 08-2019
Publisher: Wiley
Date: 26-08-2019
Publisher: Wiley
Date: 14-06-2023
Abstract: Miniaturization and energy consumption by computational systems remain major challenges to address. Optoelectronics based synaptic and light sensing provide an exciting platform for neuromorphic processing and vision applications offering several advantages. It is highly desirable to achieve single‐element image sensors that allow reception of information and execution of in‐memory computing processes while maintaining memory for much longer durations without the need for frequent electrical or optical rehearsals. In this work, ultra‐thin ( nm) doped indium oxide (In 2 O 3 ) layers are engineered to demonstrate a monolithic two‐terminal ultraviolet (UV) sensing and processing system with long optical state retention operating at 50 mV. This endows features of several conductance states within the persistent photocurrent window that are harnessed to show learning capabilities and significantly reduce the number of rehearsals. The atomically thin sheets are implemented as a focal plane array (FPA) for UV spectrum based proof‐of‐concept vision system capable of pattern recognition and memorization required for imaging and detection applications. This integrated light sensing and memory system is deployed to illustrate capabilities for real‐time, in‐sensor memorization, and recognition tasks. This study provides an important template to engineer miniaturized and low operating voltage neuromorphic platforms across the light spectrum based on application demand.
Publisher: American Chemical Society (ACS)
Date: 08-10-2019
Abstract: Metal oxide-based gas sensor technology is promising due to their practical applications in toxic and hazardous gas detection. Orthorhombic α-MoO
No related grants have been discovered for Md. Ataur Rahman.