ORCID Profile
0000-0002-0053-5641
Current Organisation
University of Melbourne
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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)
Chemical Characterisation of Materials | Functional Materials | Materials Engineering | Macromolecular and Materials Chemistry | Nanomaterials | Nanochemistry and Supramolecular Chemistry | Nanotechnology | Physical Chemistry (Incl. Structural) | Structural Chemistry and Spectroscopy | Environmental Nanotechnology | Electronic and magnetic properties of condensed matter; superconductivity | Mineralogy and Crystallography | Materials engineering | Condensed Matter Physics | Colloid And Surface Chemistry | Polymerisation Mechanisms | Organic Chemical Synthesis | Powder and Particle Technology | Analytical Spectrometry | Evolutionary Biology | Pharmaceutical Sciences | Archaeological Science | Materials Engineering not elsewhere classified | Functional materials | Condensed matter characterisation technique development | Gene Expression (incl. Microarray and other genome-wide approaches) | Comparative Physiology | Physical Chemistry not elsewhere classified | Mineral Processing/Beneficiation | Polymers and Plastics | Environmental Monitoring | Composite and Hybrid Materials | Analytical Chemistry | Characterisation of Biological Macromolecules | Medicinal and Biomolecular Chemistry | Separation Science | Ecological Applications | Colloid and Surface Chemistry | Sensor (Chemical And Bio-) Technology | Nanophotonics | Nanoscale Characterisation | Forensic Biology | Nanomanufacturing | Evolutionary Impacts of Climate Change | Ecological Impacts of Climate Change | Macromolecular and Materials Chemistry not elsewhere classified | Surfaces and Structural Properties of Condensed Matter | Condensed Matter Modelling and Density Functional Theory | Cell Development, Proliferation and Death | Biological Adaptation | Nanofabrication, Growth and Self Assembly
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Expanding Knowledge in the Biological Sciences | Expanding Knowledge in the Medical and Health Sciences | Expanding Knowledge in Engineering | Ecosystem Adaptation to Climate Change | Expanding Knowledge in Technology | Expanding Knowledge in the Earth Sciences | Coastal and Estuarine Flora, Fauna and Biodiversity | Criminal Justice | National Security | Chemical sciences | Concentrating processes of other base metal ores | Land and water management | Physical and Chemical Conditions of Water in Coastal and Estuarine Environments | Manufactured products not elsewhere classified | Treatments (e.g. chemicals, antibiotics) | Climate Variability (excl. Social Impacts) | Understanding Australia's Past | Cardiovascular system and diseases | Land and water management | Expanding Knowledge in the Environmental Sciences |
Related Links
Publications
Water-soluble Carbon Nanotube Chain-transfer Agents (CNT-CTAs)
Publisher: The Chemical Society of Japan
Date: 05-09-2007
DOI: 10.1246/CL.2007.1172
Electrochemistry of polystyrene intercalated vertically aligned single- and double-walled carbon nanotubes on gold electrodes
Publisher: Elsevier BV
Date: 11-2011
Habitat and fishing control grazing potential on coral reefs
Publisher: Wiley
Date: 06-10-2019
Simple surface modification of poly(dimethylsiloxane) for DNA hybridization
Publisher: AIP Publishing
Date: 12-2010
DOI: 10.1063/1.3523055
Abstract: Here, we present a simple chemical modification of poly(dimethylsiloxane) (PDMS) by curing a mixture of 2 wt% undecylenic acid (UDA) in PDMS prepolymer on a gold-coated glass slide. This gold slide had been previously pretreated with a self-assembled hydrophilic monolayer of 3-mercaptopropionic acid (MPA). During curing of the UDA/PDMS prepolymer, the hydrophilic UDA carboxyl moieties diffuses toward the hydrophilic MPA carboxyl moieties on the gold surface. This diffusion of the UDA within the PDMS prepolymer to the surface is a direct result of surface energy minimization. Once completely cured, the PDMS is peeled off the gold substrate, thereby exposing the interfacial carboxyl groups. These groups are then available for subsequent attachment of 5′-amino terminated DNA oligonucleotides via amide linkages. Our results show that the covalently tethered oligonucleotides can successfully capture fluorescein-labeled complementary oligonucleotides via hybridization, which are visualized using fluorescence microscopy.
Comparison of double-walled with single-walled carbon nanotube electrodes by electrochemistry
Publisher: Elsevier BV
Date: 07-2011
CO2 reduction on the Li–Ga liquid metal surface
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA00408B
Abstract: Gallium as a solvent liquid metal catalyst is used in an energy efficient, high yield and controlled reaction between lithium and CO 2 . A liquid metal electrode and the naturally formed surface products are used as a supercapacitor.
Self-assembled subnanolayers as interfacial adhesion enhancers and diffusion barriers for integrated circuits
Publisher: AIP Publishing
Date: 08-07-2003
DOI: 10.1063/1.1591232
Abstract: Preserving the structural and functional integrity of interfaces and inhibiting deleterious chemical interactions are critical for realizing devices with sub-50 nm thin films and nanoscale units. Here, we demonstrate that ∼0.7-nm-thick self-assembled monolayers (SAMs) comprising mercapto-propyl-tri-methoxy-silane (MPTMS) molecules enhance adhesion and inhibit Cu diffusion at Cu/SiO2 structures used in device metallization. Cu/SAM/SiO2/Si(001) structures show three times higher interface debond energy compared to Cu/SiO2 interfaces due to a strong chemical interaction between Cu and S termini of the MPTMS SAMs. This interaction immobilizes Cu at the Cu/SAM interface and results in a factor-of-4 increase in Cu-diffusion-induced failure times compared with that for structures without SAMs.
Carbon Exchange in Hot Alkaline Degradation of Glucose
Publisher: American Chemical Society (ACS)
Date: 11-2002
DOI: 10.1021/JO025912T
Abstract: The decomposition of 1-13C-D-glucose, 6-13C-D-glucose, and 1-13C-sodium lactate has been studied in hot (145 +/- 3 degrees C) alkaline (3.5 M) sodium hydroxide solution in order to understand the mechanisms of carbon exchange in the alkaline degradation of glucose. The results show that in the formation of lactate from glucose the carboxylate (COO-) carbon is formed preferentially from C1 carbons but methyl (CH3) carbon is formed preferentially from C6 carbons. However, on further decomposition of lactate to ethanol and carbonate, 13C-labeled carboxylate (COO-) is scrambled equally among carbonate and both carbons in product ethanol molecules. In the production of glycolate, the labeled C1 carbon mainly ends up as carboxylate (COO-) carbon, while for C6-labeled glucose the labeled carbon mainly ends up as alcoholic (CH2OH) carbon. In the production of acetate and formate there is also discrimination between C1 and C6 label.
Evaluation of transparent exopolymer particles and microbial communities found post-UV light, multimedia and cartridge filtration pre-treatment in a SWRO plant
Publisher: Informa UK Limited
Date: 26-08-2015
Solution processed graphene-silicon Schottky junction solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA03965G
Abstract: Surfactant-assisted exfoliated graphene (SAEG) has been implemented in transparent conducting graphene films which, for the first time, were used to make SAEG–silicon Schottky junctions for photovoltaics.
MACROMOLECULES IN THE BAYER PROCESS
Publisher: Walter de Gruyter GmbH
Date: 2003
Printed recyclable and self-poled polymer piezoelectric generators through single-walled carbon nanotube templating
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EE03059J
Abstract: High-performance, unpoled and recyclable piezoelectric generators are produced by combining dipole templating via single-walled carbon nanotubes with shear-induced polarisation via 3D printing of fluoropolymers.
Enhancement of DNAzymatic activity using iterative in silico maturation
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TB01638A
Abstract: Enhancement of DNZymatic activity using a combined iterative in silico and in vitro method as a cheaper and more stable alternative to antibodies or enzymes.
Formation of an α-cyclodextrin/16-mercaptohexadecanoic acid complex and its deposition on gold surfaces
Publisher: Springer Science and Business Media LLC
Date: 11-11-2008
DNA capture-probe based separation of double-stranded polymerase chain reaction amplification products in poly(dimethylsiloxane) microfluidic channels
Publisher: AIP Publishing
Date: 06-2012
DOI: 10.1063/1.4729131
Abstract: Herein, we describe the development of a novel primer system that allows for the capture of double-stranded polymerase chain reaction (PCR) lification products onto a microfluidic channel without any preliminary purification stages. We show that specially designed PCR primers consisting of the main primer sequence and an additional “tag sequence” linked through a poly(ethylene glycol) molecule can be used to generate ds-PCR lification products tailed with ss-oligonucleotides of two forensically relevant genes (amelogenin and human c-fms (macrophage colony-stimulating factor) proto-oncogene for the CSF-1 receptor (CSF1PO). Furthermore, with a view to enriching and eluting the ds-PCR products of lification on a capillary electrophoretic-based microfluidic device we describe the capture of the target ds-PCR products onto poly(dimethylsiloxane) microchannels modified with ss-oligonucleotide capture probes.
Cell Configurations and Electrode Materials for Nonaqueous Sodium‐Ion Capacitors: The Current State of the Field
Publisher: Wiley
Date: 07-05-2018
Microfluidic devices using thiol-ene polymers
Publisher: SPIE
Date: 07-12-2013
DOI: 10.1117/12.2032608
Copper removal using bio-inspired polydopamine coated natural zeolites
Publisher: Elsevier BV
Date: 05-2014
DOI: 10.1016/J.JHAZMAT.2014.03.048
Abstract: Herein, for the first time, natural clinoptilolite-rich zeolite powders modified with a bio-inspired adhesive, polydopamine (PDA), have been systematically studied as an adsorbent for copper cations (Cu(II)) from aqueous solution. Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) revealed successful grafting of PDA onto the zeolite surface. The effects of pH (2-5.5), PDA treatment time (3-24h), contact time (0 to 24h) and initial Cu(II) ion concentrations (1 to 500mgdm(-3)) on the adsorption of Cu(II) ions were studied using atomic absorption spectroscopy (AAS) and neutron activation analysis (NAA). The adsorption behavior was fitted to a Langmuir isotherm and shown to follow a pseudo-second-order reaction model. The maximum adsorption capacities of Cu(II) were shown to be 14.93mgg(-1) for pristine natural zeolite and 28.58mgg(-1) for PDA treated zeolite powders. This impressive 91.4% increase in Cu(II) ion adsorption capacity is attributed to the chelating ability of the PDA on the zeolite surface. Furthermore studies of recyclability using NAA showed that over 50% of the adsorbed copper could be removed in mild concentrations (0.01M or 0.1M) of either acid or base.
Analysis of raw and pre-treated seawater for potential biofouling precursors
Publisher: Elsevier BV
Date: 10-2015
Protected DNA strand displacement for enhanced single nucleotide discrimination in double-stranded DNA
Publisher: Springer Science and Business Media LLC
Date: 04-03-2015
DOI: 10.1038/SREP08721
Structural and Spectral Features of Selenium Nanospheres Produced by Se-Respiring Bacteria
Publisher: American Society for Microbiology
Date: 2004
DOI: 10.1128/AEM.70.1.52-60.2004
Abstract: Certain anaerobic bacteria respire toxic selenium oxyanions and in doing so produce extracellular accumulations of elemental selenium [Se(0)]. We examined three physiologically and phylogenetically erse species of selenate- and selenite-respiring bacteria, Sulfurospirillum barnesii , Bacillus selenitireducens , and Selenihalanaerobacter shriftii , for the occurrence of this phenomenon. When grown with selenium oxyanions as the electron acceptor, all of these organisms formed extracellular granules consisting of stable, uniform nanospheres (diameter, ∼300 nm) of Se(0) having monoclinic crystalline structures. Intracellular packets of Se(0) were also noted. The number of intracellular Se(0) packets could be reduced by first growing cells with nitrate as the electron acceptor and then adding selenite ions to washed suspensions of the nitrate-grown cells. This resulted in the formation of primarily extracellular Se nanospheres. After harvesting and cleansing of cellular debris, we observed large differences in the optical properties (UV-visible absorption and Raman spectra) of purified extracellular nanospheres produced in this manner by the three different bacterial species. The spectral properties in turn differed substantially from those of amorphous Se(0) formed by chemical oxidation of H 2 Se and of black, vitreous Se(0) formed chemically by reduction of selenite with ascorbate. The microbial synthesis of Se(0) nanospheres results in unique, complex, compacted nanostructural arrangements of Se atoms. These arrangements probably reflect a ersity of enzymes involved in the dissimilatory reduction that are subtly different in different microbes. Remarkably, these conditions cannot be achieved by current methods of chemical synthesis.
Biofunctionality with a twist: the importance of molecular organisation, handedness and configuration in synthetic biomaterial design
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CS00896J
Abstract: This review highlights the importance of incorporating molecular organisation, spatial configuration and handedness in biomaterial design to arrive at improved native biomolecule interactions.
Highly conductive interwoven carbon nanotube and silver nanowire transparent electrodes
Publisher: Informa UK Limited
Date: 03-2013
Morphological Flexibility of Cocconeis Placentula (Bacillariophyceae) Nanostructure to changing salinity levels
Publisher: Wiley
Date: 11-06-2010
Carbon nanotubes initiate the explosion of porous silicon
Publisher: Elsevier BV
Date: 11-2010
Variation in performance of surfactant loading and resulting nitrate removal among four selected natural zeolites
Publisher: Elsevier BV
Date: 11-2010
DOI: 10.1016/J.JHAZMAT.2010.07.069
Abstract: Surfactant modified zeolites (SMZs) have the capacity to target various types of water contaminants at relatively low cost and thus are being increasingly considered for use in improving water quality. It is important to know the surfactant loading performance of a zeolite before it is put into application. In this work we compare the loading capacity of a surfactant, hexadecyltrimethylammonium bromide (HDTMA-Br), onto four natural zeolites obtained from specific locations in the USA, Croatia, China, and Australia. The surfactant loading is examined using thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, and Raman spectroscopy. We then compare the resulting SMZs performance in removing nitrate from water. Results show that TGA is useful to determine the HDTMA loading capacity on natural zeolites. It is also useful to distinguish between a HDTMA bi-layer and a HDTMA mono-layer on the SMZ surface, which has not been previously reported in the literature. TGA results infer that HDTMA (bi-layer) loading decreases in the order of US zeolite>Croatian zeolite>Chinese zeolite>Australian zeolite. This order of loading explains variation in performance of nitrate removal between the four SMZs. The SMZs remove 8-18 times more nitrate than the raw zeolites. SMZs prepared from the selected US and Croatian zeolites were more efficient in nitrate removal than the two zeolites commercially obtained from Australia and China.
Personalized, Mechanically Strong, and Biodegradable Coronary Artery Stents via Melt Electrowriting
Publisher: American Chemical Society (ACS)
Date: 16-11-2020
Toehold-Mediated Nonenzymatic DNA Strand Displacement As a Platform for DNA Genotyping
Publisher: American Chemical Society (ACS)
Date: 03-04-2013
DOI: 10.1021/JA310991R
Abstract: Toehold-mediated DNA strand displacement provides unique advantages in the construction and manipulation of multidimensional DNA nanostructures as well as nucleic acid sequence analysis. We demonstrate a step change in the use of toehold-mediated DNA strand displacement reactions, where a double-stranded DNA duplex, containing a single-stranded toehold domain, enzymatically generated and then treated as a molecular target for analysis. The approach was successfully implemented for human DNA genotyping, such as gender identification where the amelogenin gene was used as a model target system, and detecting single nucleotide polymorphisms of human mitochondrial DNA. Kinetics of the strand displacement was monitored by the quenched Förster resonance energy transfer effect.
Benzene carboxylic acid derivatized graphene oxide nanosheets on natural zeolites as effective adsorbents for cationic dye removal
Publisher: Elsevier BV
Date: 09-2013
DOI: 10.1016/J.JHAZMAT.2013.05.041
Abstract: Graphene oxide (GO) nanosheets were grafted to acid-treated natural clinoptilolite-rich zeolite powders followed by a coupling reaction with a diazonium salt (4-carboxybenzenediazoniumtetrafluoroborate) to the GO surface. Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) revealed successful grafting of GO nanosheets onto the zeolite surface. The application of the adsorbents for the adsorption of rhodamine B from aqueous solutions was then demonstrated. After reaching adsorption equilibrium the maximum adsorption capacities were shown to be 50.25, 55.56 and 67.56 mg g(-1) for pristine natural zeolite, GO grafted zeolite (GO-zeolite) and benzene carboxylic acid derivatized GO-zeolite powders, respectively. The adsorption behavior was fitted to a Langmuir isotherm and shown to follow a pseudo-second-order reaction model. Further, a relationship between surface functional groups, pH and adsorption efficiency was established. Results indicate that benzene carboxylic acid derivatized GO-zeolite powders are environmentally favorable adsorbents for the removal of cationic dyes from aqueous solutions.
A bright future for engineering piezoelectric 2D crystals
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CS00844G
Abstract: We explore piezoelectricity in 2D crystals, envisioning assessment, prediction, and engineering 2D piezoelectricity via chemical, computational, and physical approaches.
Second-order overtone and combination modes in the LOLA region of acid treated double-walled carbon nanotubes
Publisher: AIP Publishing
Date: 28-09-2006
DOI: 10.1063/1.2354081
Abstract: Moderate acid treatment of double-walled carbon nanotubes (DWCNTs) has given rise to two new experimentally observed second-order double resonant Raman scattering frequencies centered at 1901cm−1 and 1942cm−1, in the highly dispersive LOLA region. These LOLA overtones and combination modes have been predicted by double resonance theory for two phonons associated with the K- and Γ-points, respectively.
Chemically Grafted Carbon Nanotube Surface Coverage Gradients
Publisher: American Chemical Society (ACS)
Date: 26-10-2010
DOI: 10.1021/LA103497F
Abstract: Two approaches to producing gradients of vertically aligned single-walled carbon nanotubes (SWCNTs) on silicon surfaces by chemical grafting are presented here. The first approach involves the use of a porous silicon (pSi) substrate featuring a pore size gradient, which is functionalized with 3-aminopropyltriethoxysilane (APTES). Carboxylated SWCNTs are then immobilized on the topography gradient via carbodiimide coupling. Our results show that as the pSi pore size and porosity increase across the substrate the SWCNT coverage decreases concurrently. In contrast, the second gradient is an amine-functionality gradient produced by means of vapor-phase diffusion of APTES from a reservoir onto a silicon wafer where APTES attachment changes as a function of distance from the APTES reservoir. Carboxylated SWCNTs are then immobilized via carbodiimide coupling to the amine-terminated silicon gradient. Our observations confirm that with decreasing APTES density on the surface the coverage of the attached SWCNTs also decreases. These gradient platforms pave the way for the time-efficient optimization of SWCNT coverage for applications ranging from field emission to water filtration to drug delivery.
Morphological changes of sintered polydopamine coatings
Publisher: IOP Publishing
Date: 25-02-2019
Enhanced adsorption of mercury ions on thiol derivatized single wall carbon nanotubes
Publisher: Elsevier BV
Date: 10-2013
DOI: 10.1016/J.JHAZMAT.2013.07.076
Abstract: Thiol-derivatized single walled carbon nanotube (SWCNT-SH) powders were synthesized by reacting acid-cut SWCNTs with cysteamine hydrochloride using carbodiimide coupling. Infrared (IR) spectroscopy, Raman spectroscopy and thermogravimetric analysis confirmed the successful functionalization of the SWCNTs. SWCNT-SH powders exhibited a threefold higher adsorption capacity for Hg(II) ions compared to pristine SWCNTs, and a fourfold higher adsorption capacity compared to activated carbon. The influence of adsorption time, pH, initial metal concentration and adsorbent dose on Hg(II) ion removal was investigated. The maximum adsorption capacity of the SWCNT-SH powders was estimated by using equilibrium isotherms, such as Freundlich and Langmuir, and the maximum adsorption capacity of the SWCNT-SH powder was found to be 131 mg/g. A first-order rate model was employed to describe the kinetic adsorption process of Hg(II) ions onto the SWCNT-SH powders. Desorption studies revealed that Hg(II) ions could be easily removed from the SWCNT-SH powders by altering the pH. Further, the adsorption efficiency of recovered SWCNT-SH powders was retained up to 91%, even after 5 adsorption/desorption cycles.
A Predictive Model for Monolayer-Selective Metal-Mediated MoS2 Exfoliation Incorporating Electrostatics
Publisher: Wiley
Date: 30-10-2023
Engineering Polymer Interfaces: A Review toward Controlling Triboelectric Surface Charge
Publisher: Wiley
Date: 23-07-2023
Abstract: Contact electrification and triboelectric charging are areas of intense research. Despite their low ability to accept or donate electrons, polymer insulator based triboelectric nanogenerators have emerged as highly efficient mechanical‐to‐electrical conversion devices. Here, it is reviewed the structure–property–performance of polymer insulators in triboelectric nanogenerators and focus on tools that can be used to directly enhance charge generation, via altering a polymer's mechanical, thermal, chemical, and topographical properties. In addition to the discussion of these fundamental properties, the use of additives to locally manipulate the polymer surface structure is discussed. The link between each property and the underlying charging mechanism is discussed, in the context of both increasing surface charge and predicting the polarity of surface charge, and pathways to engineer triboelectric charging are highlighted. Key questions facing the field surrounding data reporting, the role of water, and synergy between mass, electron, and ion transfer mechanisms are highlighted with aspirational goals of a holistic model for triboelectric charging proposed.
Surface modification of poly(dimethylsiloxane) (PDMS) microchannels with DNA capture-probes for potential use in microfluidic DNA analysis systems
Publisher: SPIE
Date: 21-12-2011
DOI: 10.1117/12.903208
Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material
Publisher: Elsevier BV
Date: 05-2013
DOI: 10.1016/J.JCIS.2013.01.051
Abstract: Here we report on the adsorption performance of calcium alginate (Ca-Alg2) and Ca-Alg2 with encapsulated graphene oxide (Ca-Alg2/GO) gel bead adsorbents for the successful removal of Cu(2+) ions from aqueous solution. Different adsorbent doses, Cu(2+) concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg2 and Ca-Alg2/GO gel beads were found to be 42.7 mg g(-1) and 60.2 mg g(-1), respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg2 gel beads had a higher kinetic adsorption rate at 0.0425 g mg(-1)min(-1) compared to Ca-Alg2/GO at 0.0179 g mg(-1)min(-1).
Red and green loops help uncover missing feedbacks in a coral reef social–ecological system
Publisher: Wiley
Date: 19-05-2020
DOI: 10.1002/PAN3.10092
Abstract: Social–ecological systems (SES) exhibit complex cause‐and‐effect relationships. Capturing, interpreting, and responding to signals that indicate changes in ecosystems is key for sustainable management in SES. Breaks in this signal–response chain, when feedbacks are missing, will allow change to continue until a point when abrupt ecological surprises may occur. In these situations, societies and local ecosystems can often become uncoupled. In this paper, we demonstrate how the red loop–green loop (RL–GL) concept can be used to uncover missing feedbacks and to better understand past social–ecological dynamics. Reinstating these feedbacks in order to recouple the SES may ultimately create more sustainable systems on local scales. The RL–GL concept can uncover missing feedbacks through the characterization of SES dynamics along a spectrum of human resource dependence. Drawing on erse qualitative and quantitative data sources, we classify SES dynamics throughout the history of Jamaican coral reefs along the RL–GL spectrum. We uncover missing feedbacks in red‐loop and red‐trap scenarios from around the year 600 until now. The Jamaican coral reef SES dynamics have moved between all four dynamic states described in the RL–GL concept: green loop, green trap, red loop and red trap. We then propose mechanisms to guide the current unsustainable red traps back to more sustainable green loops, involving mechanisms of seafood trade and ecological monitoring. By gradually moving away from seafood exports, Jamaica may be able to return to green‐loop dynamics between the local society and their locally sourced seafood. We discuss the potential benefits and drawbacks of this proposed intervention and give indications of why an export ban may insure against future missing feedbacks and could prolong the sustainability of the Jamaican coral reef ecosystem. Our approach demonstrates how the RL–GL approach can uncover missing feedbacks in a coral reef SES, a way the concept has not been used before. We advocate for how the RL–GL concept in a feedback setting can be used to synthesize various types of data and to gain an understanding of past, present and future sustainability that can be applied in erse social–ecological settings. A free Plain Language Summary can be found within the Supporting Information of this article.
Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate-free silver nanowire/single walled carbon nanotube transparent electrodes using graphene oxide
Publisher: Elsevier BV
Date: 10-2016
Aptamer sensor for cocaine using minor groove binder based energy transfer
Publisher: Elsevier BV
Date: 03-2012
DOI: 10.1016/J.ACA.2012.01.011
Abstract: We report on an optical aptamer sensor for cocaine detection. The cocaine sensitive fluorescein isothiocyanate (FITC)-labeled aptamer underwent a conformational change from a partial single-stranded DNA with a short hairpin to a double-stranded T-junction in the presence of the target. The DNA minor groove binder Hoechst 33342 selectively bound to the double-stranded T-junction, bringing the dye within the Förster radius of FITC, and therefore initiating minor groove binder based energy transfer (MBET), and reporting on the presence of cocaine. The sensor showed a detection limit of 0.2 μM. The sensor was also implemented on a carboxy-functionalized polydimethylsiloxane (PDMS) surface by covalently immobilizing DNA aptamers. The ability of surface-bound cocaine detection is crucial for the development of microfluidic sensors.
Sequence selective capture, release and analysis of DNA using a magnetic microbead-assisted toehold-mediated DNA strand displacement reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4AN00694A
Abstract: Oligonucleotide modified magnetic beads for the selective capture and release of forensically relevant genes for human identification.
Probing Contact Electrification: A Cohesively Sticky Problem
Publisher: American Chemical Society (ACS)
Date: 09-09-2021
Preparation and characterization of multiwalled carbon nanotube (MWCNT)/polymer nanostructured materials
Publisher: SPIE
Date: 26-12-2008
DOI: 10.1117/12.810958
Optimisation of DNA hybridisation and toehold strand displacement from magnetic bead surfaces
Publisher: Inderscience Publishers
Date: 2017
Polysulfides made from re-purposed waste are sustainable materials for removing iron from water
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7RA11999B
Abstract: A polymer prepared by co-polymerisation of sulfur and canola oil removed Fe 3+ from water. Microwave irradiation was convenient in promoting the polymerisation.
Investigating sea urchin densities critical to macroalgal control on degraded coral reefs
Publisher: Cambridge University Press (CUP)
Date: 13-01-2021
DOI: 10.1017/S037689292000051X
Abstract: There is an assumption that tropical sea urchins are macroalgal grazers with the ability to control macroalgal expansion on degraded coral reefs. We surveyed abundances of Echinothrix calamaris , an urchin species common in the western Indian Ocean on 21 reefs of the inner Seychelles and predicted their density using habitat predictors in a modelling approach. Urchin densities were greatest on patch reef habitat types and declined with increasing macroalgal cover. Next, we experimentally investigated the macroalgae-urchin relationship by penning two sea urchin densities on macroalgal fields. Over six weeks, the highest density treatment (4.44 urchins m −2 ) cleared 13% of macroalgal cover. This moderate impact leads us to conclude that controlling macroalgal expansion is not likely to be one of the main functions of E. calamaris in the inner Seychelles given the current densities we found in our surveys (mean: 0.02 urchins m −2 , maximum: 0.16 urchins m −2 ).
Beta-cyclodextrin decorated nanostructured SERS substrates facilitate selective detection of endocrine disruptorchemicals
Publisher: Elsevier BV
Date: 04-2013
DOI: 10.1016/J.BIOS.2012.10.075
Abstract: We demonstrate the selective detection of endocrine disruptor chemicals (EDCs) from river water using surface enhanced Raman scattering (SERS). By means of nanosphere lithography, the SERS substrate was prepared via the initial deposition of a monolayer of silica nanospheres (with diameter of ∼330 nm) on a silicon substrate as the template. Subsequently, a 180 nm thick layer of silver followed by a 20 nm layer of gold was deposited. This surface was modified with mono-6-deoxy-6-((2-mercaptoethyl)amino)-beta-cyclodextrin (β-CD) in order to produce a selective capture surface suitable for EDC capture and their detection by means of SERS. We show that EDC model compounds, including 3-amino-2-naphthoic acid (NAPH), potassium hydrogen phthalate (PHTH) and the EDC β-estradiol (ESTR), were captured by the β-CD decorated surface. This surface facilitated SERS detection with limits of detection of 3.0 μM (NAPH), 10 μM (PHTH) and 300 nM (ESTR), all 10-100 times lower than that without the surface modification with β-CD. In idual and simultaneous detection of NAPH and PHTH from their mixture was achieved as evidenced using the bianalyte Raman technique.
High purity synthesis of a polyhedral oligomeric silsesquioxane modified with an antibacterial
Publisher: Elsevier BV
Date: 10-2015
Phase Transitions in Octanethiol-Capped Ag, Au and CdS Nanocluster Assemblies
Publisher: Springer Science and Business Media LLC
Date: 2002
Abstract: We describe phase transitions in assemblies of octanethiol (OT)-capped nanoclusters of Ag and Au and CdS of sizes ranging from 2 to 5 nm, created by a new variant of the Brust synthesis method, without the use of phase transfer agents. We probed the stability of these assemblies by a combination of UV-Visible spectrometry, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and in situ polarized microscopy (PLM). Our results show that Ag nanoclusters form a crystalline assembly at ambient temperatures. Upon heating, these assemblies undergo two reversible phase transitions corresponding to melting of (i) a phase comprised of excess thiols that are not linked to the nanoclusters, and (ii) the nanocluster assembly, at ∼60 and 124 °C, respectively. In contrast, Au nanocluster assemblies are softer, waxy solids, and show sub-zero melting transitions. Both these assemblies show no observable mass loss up to ∼180 °C. Cds nanocluster assemblies are also waxy solids, but show a nonreversible melting transition at 137 °C, with simultaneous mass loss due to OT desorption. From our results the thermal stability of the nanoclusters was OT-Ag OT-Au OT-CdS.
Annual phytoplankton dynamics in the Gulf Saint Vincent, South Australia in 2011
Publisher: Elsevier BV
Date: 2014
DOI: 10.5697/OC.56-4.757
Oxacillin Coupled G-Quadruplexes as a Novel Biofilm-Specific Antibiotic for Staphylococcus aureus Biofilms
Publisher: American Chemical Society (ACS)
Date: 14-06-2019
Abstract: One of the most important traits of pathogenic microbial biofilms is their high tolerance to conventional antimicrobial agents, which is partially due to the presence of metabolically inactive and transiently resistant persister cells. Here, we use guanine-rich DNA structures known as G-quadruplexes (G4s) coupled with the β-lactam antibiotic, oxacillin (OX), and loaded with an iron-containing protoporphyrin IX (hemin), as OXG4/hemin complex biofilm-specific antibiotic agents. By coupling the OX to the G4, to form an OXG4/hemin complex, the diffusion of the OX was facilitated into the biofilm. Further, by utilizing the known oxidizing behavior (peroxidase-mimicking) of the G4/hemin complex, the entire system was found to be highly effectively against
Hi-fidelity discrimination of isomiRs using G-quadruplex gatekeepers
Publisher: Public Library of Science (PLoS)
Date: 16-11-2017
UV Light Stability of α-Cyclodextrin/Resveratrol Host - Guest Complexes and Isomer Stability at Varying pH
Publisher: CSIRO Publishing
Date: 2009
DOI: 10.1071/CH08506
Abstract: trans-Resveratrol is an antioxidant that readily isomerizes to the cis isomer under UV irradiation. Here we report on the UV-Visible analysis of the stability of both trans- and cis-resveratrol isomers in the presence of UV light over a pH range of 2.0–9.0 in a phosphate-borate buffer that contains sodium dodecyl sulphate and acetonitrile. The molar absorptivity of the trans-resveratrol solution absorbing at 320 nm (3.88 eV) and 305 nm (4.07 eV) was 33000 and 34000 M–1 cm–1, respectively. Results indicate that trans-resveratrol has a slower isomerization within a pH range of 5.0–8.0. A pH 8.0 results in almost immediate isomerization of the s le, whereas at pH 2.0 a photo-degradation product appears at 260 nm (4.77 eV). This was not apparent at pH 8.0. By including trans-resveratrol into a trans-resveratrol/α-cyclodextrin host–guest inclusion complex in pH 8.0 buffer isomerization was greatly reduced, with enhanced trans-resveratrol photostability.
Structure of Molecular Weight Fractions of Bayer Humic Substances. 1. Low-Temperature Products
Publisher: American Chemical Society (ACS)
Date: 04-11-1999
DOI: 10.1021/IE9903590
Surface modification for PDMS‐based microfluidic devices
Publisher: Wiley
Date: 30-11-2011
Abstract: This review focuses on advances reported from April 2009 to May 2011 in PDMS surface modifications for the application in microfluidic devices. PDMS surface modification techniques presented here include improved plasma and graft polymer coating, dynamic surfactant treatment, hydrosilylation-based surface modification and surface modification with nanomaterials such as carbon nanotubes and metal nanoparticles. Recent efforts to generate topographical and chemical patterns on PDMS are also discussed. The described surface modifications not only increase PDMS wettability, inhibit or reduce non-specific adsorption of hydrophobic species onto the surfaces in the act, but also result in the display of desired functional groups useful for molecular separations, biomolecular detection via immunoassays, cell culture and emulsion formation.
A versatile approach to grafting biofouling resistant coatings from polymeric membrane surfaces using an adhesive macroinitiator
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA09370H
Abstract: The use of a polydopamine-based macroinitiator provides a flexible attachment method that is virtually independent of membrane substrate. The subsequent ARGET-ATRP controllably grafts the stable biofouling resistant polyzwitterion coating.
Magnetic properties of multiwalled carbon nanotubes as a function of acid treatment
Publisher: Elsevier BV
Date: 07-2006
Uncovering drivers of juvenile coral density following mass bleaching
Publisher: Springer Science and Business Media LLC
Date: 06-03-2019
Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils
Publisher: Wiley
Date: 30-08-2017
Multi-Feature Face Recognition Based on 2D-PCA and SVM
Publisher: Springer New York
Date: 03-08-2012
Electrochemically prepared nanoporous gold as a SERS substrate with high enhancement
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA01909A
Abstract: Gold films were electrochemically etched into nanoporous substrates with tuneable pore sizes down to approximately 2 nm. The SERS enhancement as a result of changes in valley and ligament widths of the nanoporous gold was investigated. Compared to the conventional de-alloyed nano-gold, the etched gold showed a lower limit of detection (2 × 10 −9 M vs. 1 × 10 −7 M Rhodamine 6G).
Electrocatalytic characterization and dye degradation of Nano-TiO2 electrode films fabricated by CVD
Publisher: Elsevier BV
Date: 11-2009
DOI: 10.1016/J.SCITOTENV.2009.07.041
Abstract: A 20-40 nm anatase-titania film on a titanium electrode was fabricated using chemical vapor deposition (CVD). The film was characterized using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and atomic force microscopy (AFM). The CVD deposition time and number of deposition coatings were evaluated to establish the appropriate film fabrication parameters. Results indicate that two coatings at a deposition time of 6h each produced the best nano-TiO(2) electrode films (NTEFs) with an even distribution of ca. 20 nm diameter nanoparticles in the anatase lattice. The NTEF was tested as an electrocatalytic anode to investigate the degradation efficiency in treating methyl orange dye wastewater. A high removal efficiency of methyl orange dye and total organic carbon (TOC) of 97 and 56%, respectively was achieved using a current density of 20 mA cm(-2) for 160 min. Cyclic voltammetry showed that the electrochemical degradation reaction rate at the NTEF surface was predominately driven by molecular diffusion. The electrocatalytic decomposition rate of organic pollutants at the NTEF is controlled by mass transport, which was associated with the nanostructure of the electrocatalytic electrode.
Rapid separation of synthetic oligonucleotides on polymer modified capillary surfaces using short-end injection capillary electrophoresis in free solution
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3AN01422C
Abstract: Here we use short-end electrokinetic injection capillary electrophoresis (CE) to investigate the free solution mobility of short strands of double-stranded oligonucleotides (dsODNs) on polymer modified capillaries. Single base pair (bp) resolution (Rs) of dsODNs ranging from 16-20 bp was achieved in free solution on an 8 cm capillary dynamically coated with poly(ethylpyrrolidine methacrylate-co-methyl methacrylate) (PEPyM-co-PMMA) random copolymer. Interestingly, separation of a dsODN mixture containing two 16 bp strands of different sequences resulted in partial resolution (0.52) implying that the free solution mobility of dsODNs was sequence dependent. The single bp resolution achieved for the complementary sequence strands (the sequence of all strands in the mixtures contained the same 16 bp sequence) was improved by up to 37% for separation of dsODNs containing non-complementary sequences. The 16 bp peak was not additive within each mixture, indicating the presence of ODN-ODN interactions. Investigation of these interactions (and ODN-buffer interactions) showed that they can be influenced by the ionic strength and conductivity of the background electrolyte (BGE). Increasing the ionic strength reduced the ODN-ODN interactions and improved the resolution, whereas, increasing the conductivity reduced ODN-buffer interactions, increasing the mobility, at the consequence of promoting ODN-ODN interactions, and hence decreasing the resolution.
The electrochemical phenomena and kinetics of EDTA–copper wastewater reclamation by electrodeposition and ultrasound
Publisher: Elsevier BV
Date: 08-2009
Fabrication of self-supporting porous silicon membranes and tuning transport properties by surface functionalization
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0NR00284D
Abstract: This study presents a simple approach to perform selective mass transport through freestanding porous silicon (pSi) membranes. pSi membranes were fabricated by the electrochemical etching of silicon to produce membranes with controlled structure and pore sizes close to molecular dimensions (approximately 12 nm in diameter). While these membranes are capable of size-exclusion based separations, chemically specific filtration remains a great challenge especially in the biomedical field. Herein, we investigate the transport properties of chemically functionalized pSi membranes. The membranes were functionalized using silanes (heptadecafluoro-1,1,2,2-tetrahydrodecyl)dimethylchlorosilane (PFDS) and N-(triethoxysilylpropyl)-o-polyethylene oxide urethane (PEGS) to give membranes hydrophobic (PFDS) and hydrophilic (PEGS) properties. The transport of probe dyes tris(2,2'-bipyridyl)dichlororuthenium(ii) hexahydrate (Rubpy) and Rose Bengal (RB) through these functionalized membranes was examined to determine the effect surface functionalization has on the selectivity and separation ability of pSi membranes. This study provides the basis for further investigation into more sophisticated surface functionalization and coupled with the biocompatibility of pSi will lead to new advances in membrane based bio-separations.
HF/Microwave Impedance of Carbon Nanotube Films
Publisher: IEEE
Date: 10-2006
Graphene masks as passivation layers in the electrochemical etching of silicon
Publisher: Springer Science and Business Media LLC
Date: 02-08-2014
Synthesis of a deoxyguanosine monophosphate rich propyl methacrylate oligomer
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NJ00989A
Abstract: Propyl methacrylate oligomers with pendant guanosine monophosphate nucleotides can self-assemble in the presence of monovalent cations.
Electrochemical fabrication of nanoporous gold
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM14889G
Exploring Artificial Nucleic Acid Mimicking Peptide Nanofibers
Publisher: American Chemical Society (ACS)
Date: 17-05-2023
Surface initiated polydopamine grafted poly([2-(methacryoyloxy)ethyl]trimethylammonium chloride) coatings to produce reverse osmosis desalination membranes with anti-biofouling properties
Publisher: Elsevier BV
Date: 10-2014
Electrochemically prepared porous silver and its application in surface-enhanced Raman scattering
Publisher: Elsevier BV
Date: 08-2011
Optimization and Doping of Reduced Graphene Oxide-Silicon Solar Cells
Publisher: American Chemical Society (ACS)
Date: 15-12-2016
High‐performance capillary electrophoretic separation of double‐stranded oligonucleotides using a poly‐ (ethylpyrrolidine methacrylate‐co‐methyl methacrylate)‐coated capillary
Publisher: Wiley
Date: 04-2012
Abstract: Here we describe a capillary electrophoretic method for the separation of double-stranded oligonucleotides (ds-ODNs) ranging from 16-20 bp with 2 bp resolution using a low concentration of poly(ethylpyrrolidine methacrylate-co-methyl methacrylate) (PEPyM-co-PMMA) copolymer physically adsorbed to a capillary surface. Contrary to traditional DNA separations, we show that the ds-ODN with the highest molecular size eluted first and propose that this phenomena is due to a screening effect by the PEPyM-co-PMMA coating on the smaller ds-ODNs negative charge during elution. Key to the performance of this separation was a s le preparation time of less than 1 h and analysis time of 40 min. Repeatability of intraday migration time for the mixtures was typically < 1% relative standard deviation (n = 3). In addition, we demonstrate that the coating has an acceptable capillary lifetime of over 70 injections.
Biocompatible anti-microbial coatings for urinary catheters
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA07678E
Abstract: Using a simple dip-coating mechanism, urinary catheters have been coated with poly(2-methacryloyloxyethyl)trimethylammonium chloride (pMTAC) using activator regenerated by electron transfer (ARGET)–atom transfer radical polymerization (ATRP).
Electrospinning Triboelectric Laminates: A Pathway for Scaling Energy Harvesters
Publisher: Wiley
Date: 03-01-2023
Abstract: Herein, a new paradigm of triboelectric polymers—the triboelectric laminate—a volumetric material with electromechanical response comparable to the benchmark soft piezoelectric material polyvinylidene difluoride is reported. The electromechanical response in the triboelectric laminate arises from aligned dipoles, generated from the orientation of contact electrification in the laminates bulk volume. The dipoles form between sequential bilayers consisting of two different electrospun polymer fibers of different diameter. The loose interface between the fiber bilayers ensures friction and triboelectric charging between two polymers. The electric output from the electrospun triboelectric laminate increases with increasing density of the bilayers. This system design has clear benefits over other flexible devices for mechanical energy harvesting as it does not require any poling procedures, and the electromechanical response is stable over 24 h of continuous operation. Moreover, the electromechanically responsive electrospun laminate can be made from all types of polymers, thus providing le room for further improvements or functionalities such as stretchability, biodegradability, or biocompatibility. The concept of a triboelectric laminate can be introduced into existing triboelectric nanogenerator form factors, to dramatically increase charge harvesting of a variety of devices.
Approaches for the detection of harmful algal blooms using oligonucleotide interactions
Publisher: Springer Science and Business Media LLC
Date: 09-11-2015
DOI: 10.1007/S00216-014-8193-X
Abstract: Blooms of microscopic algae in our waterways are becoming an increasingly important environmental concern. Many are sources of harmful biotoxins that can lead to death in humans, marine life and birds. Additionally, their biomass can cause damage to ecosystems such as oxygen depletion, displacement of species and habitat alteration. Globally, the number and frequency of harmful algal blooms has increased over the last few decades, and monitoring and detection strategies have become essential for managing these events. This review discusses developments in the use of oligonucleotide-based 'molecular probes' for the selective monitoring of algal cell numbers. Specifically, hybridisation techniques will be a focus.
Phase transitions in octanethiol-capped Ag nanocluster microfilm assemblies
Publisher: Elsevier BV
Date: 02-2005
Surface treatment of Basalt fiber for use in automotive composites
Publisher: Elsevier BV
Date: 09-2020
Hydrophobic Anchoring of Monolayer-Protected Gold Nanoclusters to Carbon Nanotubes
Publisher: American Chemical Society (ACS)
Date: 05-02-2003
DOI: 10.1021/NL025824O
Spatially isolated redox processes enabled by ambipolar charge transport in multi-walled carbon nanotube mats
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0MH01967D
Abstract: Ambipolar MWCNTs are shown to transport charge from a spontaneous reaction to drive a spatially isolated redox reaction, maintaining charge neutrality without a salt bridge. This mechanism enables the study of spatially isolated redox couples.
Highly porous regenerated cellulose hydrogel and aerogel prepared from hydrothermal synthesized cellulose carbamate
Publisher: Public Library of Science (PLoS)
Date: 15-03-2017
Dynamic electrical properties of polymer-carbon nanotube composites: Enhancement through covalent bonding
Publisher: Springer Science and Business Media LLC
Date: 04-2006
Abstract: Composite formation between carbon nanotubes and polymers can dramatically enhance the electrical and thermal properties of the combined materials. We have prepared a composite from polystyrene and multi-walled carbon nanotubes (MWCNT) and, unlike traditional techniques of composite formation, we chose to polymerize styrene from the surface of dithiocarboxylic ester-functionalized MWCNTs to fabricate a unique composite material, a new technique dubbed “gRAFT” polymerization. The thermal stability of the polymer matrix in the covalently linked MWCNT-polystyrene composite is significantly enhanced, as demonstrated by a 15 °C increase of the decomposition temperature than that of the noncovalently linked MWCNT-polystyrene blend. Thin films made from the composite with low MWCNT loadings ( .9 wt%) are optically transparent, and we see no evidence of aggregation of nanotubes in the thin film or solution. The result from the conductivity measurement as a function of MWCNT loadings suggests two charge transport mechanisms: charge hopping in low MWCNT loadings (0.02–0.6 wt%) and ballistic quantum conduction in high loadings (0.6–0.9 wt%). The composite exhibits dramatically enhanced conductivity up to 33 S m −1 at a low MWCNT loading (0.9 wt%).
Non‐toxic luminescent carbon dot/poly(dimethylacrylamide) nanocomposite reagent for latent fingermark detection synthesized via surface initiated reversible addition fragmentation chain transfer polym
Publisher: Wiley
Date: 13-01-2015
DOI: 10.1002/PI.4861
Poly(dimethylsiloxane) for Triboelectricity: From Mechanisms to Practical Strategies
Publisher: American Chemical Society (ACS)
Date: 28-05-2021
Preparation and characterisation of vertically aligned single-walled carbon nanotube arrays on porous silicon
Publisher: SPIE
Date: 26-12-2008
DOI: 10.1117/12.811472
Carbon Nanotubes Anchored to Silicon for Device Fabrication
Publisher: Wiley
Date: 02-02-2010
Abstract: This report highlights recent progress in the fabrication of vertically aligned carbon nanotubes (VA-CNTs) on silicon-based materials. Research into these nanostructured composite materials is spurred by the importance of silicon as a basis for most current devices and the disruptive properties of CNTs. Various CNT attachments methods of covalent and adsorptive nature are critically compared. Selected ex les of device applications where the VA-CNT on silicon assemblies are showing particular promise are discussed. These applications include field emitters, filtration membranes, dry adhesives, sensors and scaffolds for biointerfaces.
DNA Nanostructures
Publisher: Elsevier
Date: 2019
Single-walled carbon nanotube/polyaniline/n-silicon solar cells: Fabrication, characterization, and performance measurements
Publisher: Wiley
Date: 15-01-2013
Abstract: Carbon nanotube-silicon solar cells are a recently investigated photovoltaic architecture with demonstrated high efficiencies. Silicon solar-cell devices fabricated with a thin film of conductive polymer (polyaniline) have been reported, but these devices can suffer from poor performance due to the limited lateral current-carrying capacity of thin polymer films. Herein, hybrid solar-cell devices of a thin film of polyaniline deposited on silicon and covered by a single-walled carbon nanotube film are fabricated and characterized. These hybrid devices combine the conformal coverage given by the polymer and the excellent electrical properties of single-walled carbon nanotube films and significantly outperform either of their component counterparts. Treatment of the silicon base and carbon nanotubes with hydrofluoric acid and a strong oxidizer (thionyl chloride) leads to a significant improvement in performance.
Grapevine waste in sustainable hybrid particleboard production
Publisher: Elsevier BV
Date: 12-2020
Cadmium sulfide quantum dot/chitosan nanocomposites for latent fingermark detection
Publisher: Elsevier BV
Date: 05-2009
DOI: 10.1016/J.FORSCIINT.2009.03.006
Abstract: The detection of latent fingermarks is a challenging task in forensic science. Here we present work using highly photoluminescent cadmium sulfide (CdS) quantum dots (QDs) encapsulated in an inexpensive biopolymeric chitosan matrix for latent fingermark detection. Cadmium ions were chelated within the chitosan matrix followed by the rapid addition of sodium sulfide to produce a CdS/chitosan nanocomposite. The average QD size was investigated as a function of precursor concentrations using ultra-violet-vis (UV-vis) spectrophotometry and the QDs were imaged with transmission electron microscopy (TEM). Fluorescence spectrophotometry of the QDs at an excitation of 450 nm showed a narrow emission at 531 nm and broad emission between 600 and 850 nm with a maximum at 716 nm. Freshly deposited latent fingermarks deposited on aluminium foil were clearly detected under a Rofin Polilight at 450 nm by dusting with a freeze-dried suspension of the CdS/chitosan nanocomposite and a surfactant, tergitol, giving a so-called quantum dot surfactant (QDS) powder.
Diatoms response to salinity changes: investigations using single pulse and cross polarisation magic angle spinning 29Si NMR spectra
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8AN00948A
Abstract: Diatoms Thalassiosira pseudonana and Chaetoceros muelleri (Bacillariophyceae) were cultured at three different salinities and examined using 29 Si MAS-NMR spectroscopy.
Copper cation transport and scaling of ionic exchange membranes using electrodialysis under electroconvection conditions
Publisher: Elsevier BV
Date: 09-2010
Synthetic stimuli-responsive ‘smart’ fibers
Publisher: Elsevier BV
Date: 06-2016
Selective adsorption of globulin on nanofiber meshes for immunoadsorption therapy
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7NJ04672C
Abstract: Cost-effective development of a carboxylated EVOH nanofiber mesh to adsorb γ-globulin selectively for immunoadsorption therapy.
High-order graphene oxide nanoarchitectures
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1NR10406C
Abstract: We fabricate unique photoluminescent three dimensional graphene oxide (GO) architectures, so-called GO flowers, by self-assembly onto silicon substrates via solvent-mediated volume-controlled growth. The GO flowers exhibited bright photoluminescence and a photoresponse demonstrating their potential for advanced optical and electronic applications, such as advanced photovoltaic devices and organic light emitting diodes.
Comparison of hydroxyl radical yields between photo- and electro-catalyzed water treatments
Publisher: Elsevier BV
Date: 07-2014
Fabrication and electrochemical behavior of vertically-aligned carbon nanotube electrodes covalently attached to p-type silicon via a thioester linkage
Publisher: Elsevier BV
Date: 04-2009
Recent developments in nucleic acid identification using solid-phase enzymatic assays
Publisher: Springer Science and Business Media LLC
Date: 04-02-2014
Opportunities and Challenges in DNA-Hybrid Nanomaterials
Publisher: American Chemical Society (ACS)
Date: 15-08-2019
Abstract: Nature has inspired the development of many life-like materials. Although still simplistic, key biological functionalities have been incorporated, enabling a wide variety of applications. DNA-based systems, in particular, show high promise due to their ability to merge specific Watson-Crick base pairing with unique properties that are also programmable, scalable, or dynamic. By combining the fields of DNA-based covalent polymers, DNA origami, and DNA-functionalized supramolecular polymers, new frontiers in next-generation DNA-based hybrid materials that can outperform current bioartificial systems will be realized. Many challenges must still be overcome before this emerging technology can be materialized.
Seasonal changes in phytoplankton on the north-eastern shelf of Kangaroo Island (South Australia) in 2012 and 2013
Publisher: Elsevier BV
Date: 07-2015
Ag2SO4 decorated with fluorescent Agn nanoclusters
Publisher: Elsevier BV
Date: 04-2013
Optimization of physical parameters of 'injected' metal electrodes for capacitively coupled contactless conductivity detection on poly(dimethylsiloxane) microchips
Publisher: SPIE
Date: 07-12-2013
DOI: 10.1117/12.2033616
Environmental variability and phytoplankton dynamics in a South Australian inverse estuary
Publisher: Elsevier BV
Date: 12-2014
Single walled carbon nanotube network electrodes for dye solar cells
Publisher: Elsevier BV
Date: 10-2010
Near-Zero-Thickness Self-Assembled Molecular Layers for Future Device Structures: Interfacial Adhesion and Diffusion Barrier Properties
Publisher: Trans Tech Publications, Ltd.
Date: 08-2003
Toxicity of thiolated silica nanoparticles modified with sulfobetaine methacrylate for potential use in chemotherapy drug conjugation
Publisher: Journal of Applied Pharmaceutical Science
Date: 2017
Nanotechnology as a New Tool for Fingermark Detection: A Review
Publisher: Bentham Science Publishers Ltd.
Date: 04-2011
Stimulus‐Responsive Polymers at Nanointerfaces
Publisher: Wiley
Date: 23-02-2011
DOI: 10.1002/9783527610419.NTLS0247
Abstract: The sections in this article are
Templateless Room-Temperature Assembly of Nanowire Networks from Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 21-05-2004
DOI: 10.1021/LA0497649
Abstract: We demonstrate a new, room-temperature approach to assemble two-dimensional and three-dimensional networks of gold nanowires by agitating nanoparticles in a toluene-aqueous mixture, without the use of templates. The nanowires have a uniform diameter of about 5 nm and consist of coalesced face-centered cubic nanocrystals. Toluene molecules passivate the gold surfaces during nanoparticle coalescence, rendering the nanowires hydrophobic and enabling their transfer into the toluene layer. Such templateless low-temperature assembly of mesostructures from nanoscale building blocks open up new possibilities for creating porous self-supporting nanocatalysts, nanowires for device interconnection, and low-density high-strength nanofillers for composites.
Acoustotemplating: rapid synthesis of freestanding quasi-2D MOF/graphene oxide heterostructures for supercapacitor applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TA10493D
Abstract: Quasi two-dimensional MOF/graphene oxide heterostructures are synthesized using a MHz frequency acoustotemplating method. The composite exhibits two-orders of magnitude higher supercapacitance compared to its 3D HKUST-1/graphene oxide counterpart.
Macro-Size Regenerated Cellulose Fibre Embedded with Graphene Oxide with Antibacterial Properties
Publisher: MDPI AG
Date: 2023
Abstract: Macro-size regenerated cellulose fibres (RCFs) with embedded graphene oxide (GO) were fabricated by dissolving cellulose in a pre-cooled sodium hydroxide (NaOH)/urea solution and regenerated in sulphuric acid (H2SO4) coagulant. Initially, GO was found to disperse well in the cellulose solution due to intercalation with the cellulose however, this cellulose–GO intercalation was disturbed during the regeneration process, causing agglomeration of GO in the RCF mixture. Agglomerated GO was confirmed at a higher GO content under a Dino-Lite microscope. The crystallinity index (CrI) and thermal properties of the RCFs increased with increasing GO loadings, up to 2 wt.%, and reduced thereafter. Cellulose–GO intercalation was observed at lower GO concentrations, which enhanced the crystallinity and thermal properties of the RCF–GO composite. It was shown that the GO exhibited antibacterial properties in the RCF–GO composite, with the highest bacterial inhibition against E. coli and S. aureus.
Adsorption and Desorption of Single-Stranded DNA from Single-Walled Carbon Nanotubes
Publisher: Wiley
Date: 12-05-2017
Abstract: The chemical affinity of single-stranded DNA (ssDNA) to adsorb to the surface of single-walled carbon nanotubes (SWCNTs) is used for SWCNT purification, separation and in bio-devices. Despite the popularity of research on SWCNT-ssDNA conjugates, very little work has studied the removal of adsorbed ssDNA on SWCNTs. This paper reports a comprehensive study of biological, physical and chemical treatments for the removal of ssDNA from SWCNT-ssDNA suspensions. These include enzymatic cleavage, heat treatment under vacuum up to 400 °C, chemical treatments with high or low pH, oxidizing conditions, and high-ionic-strength solvents. Complimentary characterization techniques including fluorescence from a DNA-intercalating dye (YO-PRO-1) and photoelectron spectroscopy are used to exhaustively study and compare the methods investigated. Enzyme treatment is found to remove the phosphate backbone only, leaving nucleosides adsorbed to SWCNTs. Heating in inert atmosphere is ineffective at removing ssDNA. Acid, base and oxidative treatment are found to be effective for the removal of ssDNA from SWCNTs. Where possible the mechanism of desorption is described and from the findings suggestions for "best practices" are provided.
Bayer Poisons: Degradation of Klason Lignin in Sodium Hydroxide at 145 °C
Publisher: American Chemical Society (ACS)
Date: 15-11-2002
DOI: 10.1021/IE010896W
Weakening macroalgal feedbacks through shading on degraded coral reefs
Publisher: Wiley
Date: 21-02-2021
DOI: 10.1002/AQC.3546
Abstract: Extensive and dense macroalgal fields can compromise the ecosystem function of habitat mosaics on reefs owing to their limiting effect on patch connectivity. Macroalgae can maintain and increase their dominance with effective self‐reinforcing feedback mechanisms. For ex le, macroalgae can form dense beds, supressing coral settlement and grazing by herbivores. This compromised ecosystem function can lead to major socioeconomic and ecological changes. Dense macroalgal beds were shaded with submerged shade sails of two sizes and changes to the underlying benthos and feeding rates of herbivorous fishes were recorded. The shade sails reduced the algae's ability to photosynthesize by 29%. After 6 weeks, macroalgal cover was reduced by 24% under small sails and by 51% under large sails. Small shade sails reduced turf algal growth by 23%, while large sails reduced growth by 82%. Three months after removal of the shade sails, algal beds had almost completely regrown. During this regrowth period, herbivore bites taken from the experiment's substrates were recorded, with grazing impact reducing significantly with time. This study is the first to achieve macroalgal reduction via the alteration of the light regime. While macroalgae regrew in this relatively short‐term experiment, shading may be a viable reef management approach that aims to maximize habitat mosaics on coral reefs, particularly if used in combination with other intervention methods.
Polyelectrolyte nanolayers as diffusion barriers for Cu metallization
Publisher: AIP Publishing
Date: 15-10-2003
DOI: 10.1063/1.1618951
Abstract: Cu interconnect technology requires the use of & -nm-thick interfacial layers to inhibit Cu transport into adjacent dielectric layers. We demonstrate the use of 3.5-nm-thick polyelectrolyte layers comprising polyethyleneimine (PEI) and polyacrylic acid (PAA) for this application. Cu/PAA/PEI/SiO2/Si structures show more than a factor-of-5 greater failure time compared to that observed in Cu/SiO2/Si structures. Increasing the number of PAA/PEI bilayers does not show any further improvement in barrier properties. Spectroscopic probing of the Cu/PAA interface reveals that polychelation of Cu with carboxyl groups in PAA is the primary reason for Cu immobilization. Our study suggests that polyelectrolyte nanolayers are attractive for applications such as tailoring barrierless low-k polymeric dielectrics, and for isolating nanoscale components in future device systems.
Stimulus-Responsiveness and Drug Release from Porous Silicon Films ATRP-Grafted with Poly(N-isopropylacrylamide)
Publisher: American Chemical Society (ACS)
Date: 23-05-2011
DOI: 10.1021/LA200551G
Abstract: In this report, we employ surface-initiated atom transfer radical polymerization (SI-ATRP) to graft a thermoresponsive polymer, poly(N-isopropylacrylamide) (PNIPAM), of controlled thickness from porous silicon (pSi) films to produce a stimulus-responsive inorganic-organic composite material. The optical properties of this material are studied using interferometric reflectance spectroscopy (IRS) above and below the lower critical solution temperature (LCST) of the PNIPAM graft polymer with regard to variation of pore sizes and thickness of the pSi layer (using discrete s les and pSi gradients) and also the thickness of the PNIPAM coatings. Our investigations of the composite's thermal switching properties show that pore size, pSi layer thickness, and PNIPAM coating thickness critically influence the material's thermoresponsiveness. This composite material has considerable potential for a range of applications including temperature sensors and feedback controlled drug release. Indeed, we demonstrate that modulation of the temperature around the LCST significantly alters the rate of release of the fluorescent anticancer drug c tothecin from the pSi-PNIPAM composite films.
CdS/polymer nanocomposites synthesized via surface initiated RAFT polymerization for the fluorescent detection of latent fingermarks
Publisher: Elsevier BV
Date: 05-2013
DOI: 10.1016/J.FORSCIINT.2013.02.044
Abstract: Current advances in nanoscience have provided the unique opportunity to utilize nanostructured materials to improve the visualization and quality of fingermark development. Here, we show the facile controlled fabrication of CdS oly(dimethylacrylamide), CdS oly(dimethylacrylamide-co-methyl methacrylate) and CdS oly(dimethylacrylamide-co-styrene) fluorescent quantum dot nanocomposites for use as latent fingermark developing agents on non-porous surfaces. First, CdS quantum dots were capped with 2-mercaptoethanol with subsequent immobilization of a carboxylated C12-chain transfer agent (C12CTA) via an ester bond. A surface initiated reversible addition fragmentation chain transfer (RAFT) polymerization was then performed under a controlled system resulting in nanocomposites containing polymers of low polydispersity. The intrinsic optical properties of the CdS quantum dots were retained throughout the synthetic pathways, which allowed for the successful one-step application and fluorescent visualization of latent fingermarks (fresh and aged) on aluminum foil and glass substrates under UV illumination.
Antimony-carbon nanocomposites for potassium-ion batteries: Insight into the failure mechanism in electrodes and possible avenues to improve cyclic stability
Publisher: Elsevier BV
Date: 02-2019
29Si{1H} CP-MAS NMR comparison and ATR-FTIR spectroscopic analysis of the diatoms Chaetoceros muelleri and Thalassiosira pseudonana grown at different salinities
Publisher: Springer Science and Business Media LLC
Date: 31-01-2013
DOI: 10.1007/S00216-013-6746-Z
Abstract: Diatoms are key indicators of marine environmental health. To further understand how diatoms respond to varying degrees of salinity, either due to climate change or brine waste discharge into marine environments, two different diatom species were studied. Thalassiosira pseudonana and Chaetoceros muelleri were cultured at three different salinities namely, 26 practical salinity units (PSU or parts per thousand), 36 PSU (standard salinity for culturing of seawater species) and 46 PSU. Changes in silica and organic content within the cultured diatoms were analysed using solid-state (29)Si{(1)H} cross-polarization-magic angle spinning (CP-MAS) nuclear magnetic resonance (NMR) and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopies coupled with analysis of variance. (29)Si CP-MAS NMR showed that qualitatively the Q4:Q3 area ratios of C. muelleri, grown away from standard salinities, increased in response to the formation of more condensed (2 ≡SiOH → ≡Si-O-Si≡ + H2O) and/or an increase in closely associated organic matter to the Q4 component of the diatoms. This was not observed for T. pseudonana. However, both species showed the appearance of a new peak centered at 1575-1580 cm(-1) in the ATR-FTIR spectra, designated as the C═N band of nitrogenous purine-type compounds. Further, the C. muelleri species was shown to produce more extracellular polymeric substances at non-standard salinities. On this basis, results suggest that there is a strong relationship between diatom composition and salinity and that C. muelleri is more sensitive to its environment than T. pseudonana.
Molecular Structure of 3-Aminopropyltriethoxysilane Layers Formed on Silanol-Terminated Silicon Surfaces
Publisher: American Chemical Society (ACS)
Date: 07-03-2012
DOI: 10.1021/JP212056S
Functionalization of carbon nanotubes using phenosafranin
Publisher: AIP Publishing
Date: 03-2004
DOI: 10.1063/1.1644109
Abstract: Spectroscopic analysis and atomic force microscopy (AFM) phase imaging studies show self-assembly of phenosafranin (PSF) to multiwalled carbon nanotubes (MWNTs). The shift in absorption spectra is associated with charge transfer of valence electrons from PSF to electron accepting sites on the MWNTs. The Raman-active disorder modes are used to fingerprint PSF attachment to MWNTs via defect states. AFM phase imaging was used to obtain a molecular topographic visual confirmation of PSF attached to the MWNT.
Cover Feature: Laying Waste to Mercury: Inexpensive Sorbents Made from Sulfur and Recycled Cooking Oils (Chem. Eur. J. 64/2017)
Publisher: Wiley
Date: 12-09-2017
Chemistry of Sodium Lactate Formation under Simulated Alumina Refinery Conditions
Publisher: American Chemical Society (ACS)
Date: 30-05-2003
DOI: 10.1021/IE020817W
Electroless plated gold as a support for carbon nanotube electrodes
Publisher: Elsevier BV
Date: 04-2009
On-chip capacitively coupled contactless conductivity detection using “injected” metal electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3AN00870C
Abstract: We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C(4)D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10(-6) M, 6.7 × 10(-6) M and 8.5 × 10(-6) M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C(4)D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.
Polymerization-Amplified Optical DNA Detection on Porous Silicon Templates
Publisher: American Chemical Society (ACS)
Date: 03-07-2012
DOI: 10.1021/MZ300064K
Abstract: A porous silicon-based optical DNA sensor is described herein, which enables rapid DNA detection. The DNA sensor relies on the specificity of the DNA base pairing in conjunction with an interferometric optical signal lification step based on polymer formation within the porous silicon layer to detect the DNA targets in a highly selective fashion. We demonstrate that it is possible to discriminate between DNA strands exhibiting even a single nucleotide mismatch using this sensor.
The impact of diatoms on the biofouling of seawater reverse osmosis membranes in a model cross-flow system
Publisher: Elsevier BV
Date: 08-2016
Amelogenin locus typing using toehold-assisted fluorescent DNA melting analysis
Publisher: Elsevier BV
Date: 2013
Pathway to high throughput, low cost indium-free transparent electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03248B
Abstract: A high throughput process is reported for the production of a highly conductive, transparent planar electrode comprising of silver nanowires and single walled carbon nanotubes imbedded into PEDOT:PSS.
Structural Determination of Thermally and Hydrazine Treated Graphene Oxide Using Electron Spectroscopic Analysis
Publisher: American Chemical Society (ACS)
Date: 07-10-2013
DOI: 10.1021/JP405682U
Detection of harmful algal bloom causing microalgae using covalently immobilised capture oligonucleotide probes on glass and poly(dimethylsiloxane) surfaces
Publisher: SPIE
Date: 07-12-2013
DOI: 10.1117/12.2034011
Nanosized Pt-Co Catalysts for the Preferential CO Oxidation
Publisher: American Scientific Publishers
Date: 11-2006
DOI: 10.1166/JNN.2006.058
Raman scattering analysis of changes induced by chemical treatment of double-walled carbon nanotubes
Publisher: Elsevier BV
Date: 09-2005
Electrochemical synthesis of silver oxide nanowires, microplatelets and application as SERS substrate precursors
Publisher: Elsevier BV
Date: 2012
Water Transport Through Nanoporous Materials: Porous Silicon and Single Walled Carbon Nanotubes
Publisher: IEEE
Date: 02-2010
Functionalization of vertically aligned carbon nanotubes with polystyrene via surface initiated reversible addition fragmentation chain transfer polymerization
Publisher: Elsevier BV
Date: 2012
Valence band structure of PDMS surface and a blend with MWCNTs:A UPS and MIES study of an insulating polymer
Publisher: Elsevier BV
Date: 10-2015
Poly(dimethylsiloxane) Surface Modification by Plasma Treatment for DNA Hybridization Applications
Publisher: American Scientific Publishers
Date: 11-2010
Abstract: In this work, the surface modification of poly(dimethylsiloxane) (PDMS) was carried out by using a 2-step plasma modification with Ar followed by acrylic acid (AAc). The optimal conditions were found to be 0.5 min with Ar at 0.7 mbar and 5 min with AAc at 0.2 mbar. The water contact angle (WCA) of the native PDMS decreased from 110 degrees to 30 degrees after modification, then stabilized to values between 50 degrees to 60 degrees after 1 day exposure to air. The stability of the modified PDMS was further improved by Soxhlet-extracting the PDMS with hexane prior to plasma treatment. Atomic force microscopy (AFM) showed significant changes in surface morphology after the 2-step plasma modification. X-ray photoelectron (XPS) spectroscopy further confirmed the successful modification of the PDMS surface with PAAc, by exhibiting C1s peaks at 285.9 eV, 287.4 eV and 289.9 eV, originating from C-O, C=O and O-C=O moieties, respectively. Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy of the poly(acrylic acid) (PAAc) modified PDMS surface showed a distinctive peak at 1715 cm(-1), attributed to the presence of COOH groups from the PAAc. The carboxyl peak on the spectra of the PAAc modified PDMS was quite stable even after storage at room temperature in phosphate buffer saline (PBS) and N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid (HEPES) buffer for 17 h. 5'-amino-terminated oligonucleotides were covalently attached to the PAAc modified PDMS surface via carbodiimide coupling. Subsequently, fluorescently tagged complementary oligonucleotides were successfully hybridized to this surface, as determined by fluorescence microscopy.
Synthesis of Reduced Graphene Oxide Obtained from Multiwalled Carbon Nanotubes and Its Electrocatalytic Properties
Publisher: CRC Press
Date: 27-04-2016
DOI: 10.1201/B19606-22
Direct detection of histamine in fish flesh using microchip electrophoresis with capacitively coupled contactless conductivity detection
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4AY02866J
Abstract: We demonstrate the use of microchip electrophoresis with capacitively coupled contactless conductivity detection (C 4 D) for the direct detection of histamine in fish flesh s les.
Effect of Electrolyte and Anode on Dissolved Oxygen Yield in Electrocatalytic Processing of Wastewater
Publisher: Mary Ann Liebert Inc
Date: 07-2012
Planar silver nanowire, carbon nanotube and PEDOT:PSS nanocomposite transparent electrodes
Publisher: Informa UK Limited
Date: 23-03-2015
Energy Interplay in Materials: Unlocking Next-Generation Synchronous Multisource Energy Conversion with Layered 2D Crystals
Publisher: Wiley
Date: 02-08-2022
Abstract: Layered 2D crystals have unique properties and rich chemical and electronic ersity, with over 6000 2D crystals known and, in principle, millions of different stacked hybrid 2D crystals accessible. This ersity provides unique combinations of properties that can profoundly affect the future of energy conversion and harvesting devices. Notably, this includes catalysts, photovoltaics, superconductors, solar‐fuel generators, and piezoelectric devices that will receive broad commercial uptake in the near future. However, the unique properties of layered 2D crystals are not limited to in idual applications and they can achieve exceptional performance in multiple energy conversion applications synchronously. This synchronous multisource energy conversion (SMEC) has yet to be fully realized but offers a real game‐changer in how devices will be produced and utilized in the future. This perspective highlights the energy interplay in materials and its impact on energy conversion, how SMEC devices can be realized, particularly through layered 2D crystals, and provides a vision of the future of effective environmental energy harvesting devices with layered 2D crystals.
Comparison of partial replacement of fishmeal with soybean meal and EnzoMeal on growth performance of Asian seabass Lates calcarifer
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.CBPC.2018.10.006
Abstract: This study explored the impact of fishmeal replacement by commercial soybean meal (SM) and EnzoMeal (EZM) on Asian seabass Lates calcarifer growth performance using six diets. The six diets comprised two sources of plant proteins with three levels each, including 300 g kg
Bacterial production of transparent exopolymer particles during static and laboratory-based cross-flow experiments
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5EW00275C
Abstract: The aim of this paper was to provide novel insights into the biofouling mechanism of transparent exopolymer particles (TEP) production through the use of static and laboratory-based cross flow experiments.
Interfacial piezoelectric polarization locking in printable Ti3C2Tx MXene-fluoropolymer composites
Publisher: Springer Science and Business Media LLC
Date: 26-05-2021
DOI: 10.1038/S41467-021-23341-3
Abstract: Piezoelectric fluoropolymers convert mechanical energy to electricity and are ideal for sustainably providing power to electronic devices. To convert mechanical energy, a net polarization must be induced in the fluoropolymer, which is currently achieved via an energy-intensive electrical poling process. Eliminating this process will enable the low-energy production of efficient energy harvesters. Here, by combining molecular dynamics simulations, piezoresponse force microscopy, and electrodynamic measurements, we reveal a hitherto unseen polarization locking phenomena of poly(vinylidene fluoride– co –trifluoroethylene) (PVDF-TrFE) perpendicular to the basal plane of two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets. This polarization locking, driven by strong electrostatic interactions enabled exceptional energy harvesting performance, with a measured piezoelectric charge coefficient, d 33 , of −52.0 picocoulombs per newton, significantly higher than electrically poled PVDF-TrFE (approximately −38 picocoulombs per newton). This study provides a new fundamental and low-energy input mechanism of poling fluoropolymers, which enables new levels of performance in electromechanical technologies.
Phenanthrene removal in unsaturated soils treated by electrokinetics with different surfactants—Triton X-100 and rhamnolipid
Publisher: Elsevier BV
Date: 09-2009
Solution chemistry approach to fabricate vertically aligned carbon nanotubes on gold wires: towards vertically integrated electronics
Publisher: IOP Publishing
Date: 26-09-2008
DOI: 10.1088/0957-4484/19/44/445301
Abstract: A monolayer of hexadecyltrichlorosilane, 3-aminopropyltriethoxysilane or 3-mercaptopropyltrimethoxysilane was self-assembled onto a p-type silicon (100) substrate to provide a resist for electrochemical anodization with an atomic force microscope cantilever. Silane treatment of the oxide nanostructures created by anodization lithography allowed for the creation of a chemically heterogeneous surface, containing regions of -NH(2) or -SH surrounded by -CH(3) functionality. These patterned regions of -NH(2) or -SH provided the point of attachment for citrate-stabilized gold colloid nanoparticles, which act as 'seed' particles for the electro-less deposition of gold. This has allowed the creation of gold wires on a silicon surface. Carbon nanotubes, with high carboxylic acid functionality, were vertically immobilized on the patterned gold wires with the use of a cysteamine monolayer and a condensation reaction. Such a material may prove useful in the creation of future vertically integrated electronic devices where it is desirable for electron transport to be in three dimensions and this electron transport is demonstrated with cyclic voltammetry.
Bayer Poisons: Degradation of Angiosperm and Gymnosperm Water-Soluble Extracts in Sodium Hydroxide at 145 °C
Publisher: American Chemical Society (ACS)
Date: 10-05-2002
DOI: 10.1021/IE010803A
Direct ink writing of dehydrofluorinated Poly(Vinylidene Difluoride) for microfiltration membrane fabrication
Publisher: Elsevier BV
Date: 08-2021
Foundations of Space and Time: Reflections on Quantum Gravity, edited by Jeff Murugan, Amanda Weltman and George F.R. Ellis
Publisher: Informa UK Limited
Date: 02-2013
Enhanced rectification through polymer-gold nanoparticle interaction
Publisher: Elsevier BV
Date: 10-2005
Measuring Piezoelectric Output—Fact or Friction?
Publisher: Wiley
Date: 06-07-2020
New developments in composites, copolymer technologies and processing techniques for flexible fluoropolymer piezoelectric generators for efficient energy harvesting
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8EE03006E
Abstract: A comprehensive review of current developments in flexible fluoropolymer-based piezoelectric generators for sustainable energy harvesting.
Highly dispersed and disordered nickel-iron layered hydroxides and sulphides: Robust and high-activity water oxidation catalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8SE00129D
Abstract: A rapid low-temperature microwave-assisted synthesis of nickel(iron) layered hydroxides and sulphides that exhibit robust catalytic activity for electrooxidation of alkaline water is introduced.
One-step surface modification of poly(dimethylsiloxane) by undecylenic acid
Publisher: SPIE
Date: 26-12-2008
DOI: 10.1117/12.810101
Role of helicity in the nonenzymatic template-directed primer extension of DNA
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3OB01179H
Abstract: A 2-fold (2AI-dA) and 4.5-fold (2AI-dC) increase in nonenzymatic template-directed primer extension of DNA was observed when a conformational shift was induced by RNA binding.
Diatom adaptability to environmental change: A case study of two Cocconeis species from high-salinity areas
Publisher: Informa UK Limited
Date: 18-10-2013
Microfabrication of PDMS microchannels using SU-8/PMMA moldings and their sealing to polystyrene substrates
Publisher: IOP Publishing
Date: 30-01-2007
Recent developments in PDMS surface modification for microfluidic devices
Publisher: Wiley
Date: 28-12-2009
Abstract: PDMS is enjoying continued and ever increasing popularity as the material of choice for microfluidic devices due to its low cost, ease of fabrication, oxygen permeability and optical transparency. However, PDMS's hydrophobicity and fast hydrophobic recovery after surface hydrophilization, attributed to its low glass transition temperature of less than -120 degrees C, negatively impacts on the performance of PDMS-based microfluidic device components. This issue has spawned a flurry of research to devise longer lasting surface modifications of PDMS, with particular emphasis on microfluidic applications. This review will present recent research on surface modifications of PDMS using techniques ranging from metal layer coatings and layer-by-layer depositions to dynamic surfactant treatments and the adsorption of hipathic proteins. We will also discuss significant advances that have been made with a broad palette of gas-phase processing methods including plasma processing, sol-gel coatings and chemical vapor deposition. Finally, we will present ex les of applications and future prospects of modified PDMS surfaces in microfluidics, in areas such as molecular separations, cell culture in microchannels and biomolecular detection via immunoassays.
High-throughput physicochemical analysis of thermoresponsive polymers
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7PY02066J
Abstract: A novel high-throughput approach to rapidly measure the lower critical solution temperature, critical micelle concentration and critical micelle temperature of thermoresponsive polymers was developed and utilized to generate a physicochemical ‘ MAP ’ of a polymer series.
Single Walled Carbon Nanotube Array as Working Electrode for Dye Solar Cells
Publisher: IEEE
Date: 02-2010
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