ORCID Profile
0000-0003-3215-8841
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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)
Composite and Hybrid Materials | Nanotechnology not elsewhere classified | Macromolecular and Materials Chemistry | Biomaterials | Polymers and Plastics | Macromolecular and Materials Chemistry not elsewhere classified | Materials Engineering | Chemical Characterisation of Materials
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Chemical Sciences | Manufacturing not elsewhere classified | Polymeric Materials (e.g. Paints) |
Related Links
Publications
A Novel Fabrication Approach for Multifunctional Graphene-based Thin Film Nano-composite Membranes with Enhanced Desalination and Antibacterial Characteristics
Publisher: Springer Science and Business Media LLC
Date: 08-08-2017
DOI: 10.1038/S41598-017-07531-Y
Abstract: A practical fabrication technique is presented to tackle the trade-off between the water flux and salt rejection of thin film composite (TFC) reverse osmosis (RO) membranes through controlled creation of a thinner active selective polyamide (PA) layer. The new thin film nano-composite (TFNC) RO membranes were synthesized with multifunctional poly tannic acid-functionalized graphene oxide nanosheets (pTA-f-GO) embedded in its PA thin active layer, which is produced through interfacial polymerization. The incorporation of pTA-f-GOL into the fabricated TFNC membranes resulted in a thinner PA layer with lower roughness and higher hydrophilicity compared to pristine membrane. These properties enhanced both the membrane water flux (improved by 40%) and salt rejection (increased by 8%) of the TFNC membrane. Furthermore, the incorporation of biocidal pTA-f-GO nanosheets into the PA active layer contributed to improving the antibacterial properties by 80%, compared to pristine membrane. The fabrication of the pTA-f-GO nanosheets embedded in the PA layer presented in this study is a very practical, scalable and generic process that can potentially be applied in different types of separation membranes resulting in less energy consumption, increased cost-efficiency and improved performance.
Galaxy and Mass Assembly (GAMA): formation and growth of elliptical galaxies in the group environment
Publisher: Oxford University Press (OUP)
Date: 22-02-2017
DOI: 10.1093/MNRAS/STX441
Nanostructured Electrochemical Biosensors for Label-Free Detection of Water- and Food-Borne Pathogens
Publisher: American Chemical Society (ACS)
Date: 12-02-2018
Abstract: The emergence of nanostructured materials has opened new horizons in the development of next generation biosensors. Being able to control the design of the electrode interface at the nanoscale combined with the intrinsic characteristics of the nanomaterials engenders novel biosensing platforms with improved capabilities. The purpose of this review is to provide a comprehensive and critical overview of the latest trends in emerging nanostructured electrochemical biosensors. A detailed description and discussion of recent approaches to construct label-free electrochemical nanostructured electrodes is given with special focus on pathogen detection for environmental monitoring and food safety. This includes the use of nanoscale materials such as nanotubes, nanowires, nanoparticles, and nanosheets as well as porous nanostructured materials including nanoporous anodic alumina, mesoporous silica, porous silicon, and polystyrene nanochannels. These platforms may pave the way toward the development of point-of-care portable electronic devices for applications ranging from environmental analysis to biomedical diagnostics.
Electrically and thermally conductive elastomer by using MXene nanosheets with interface modification
Publisher: Elsevier BV
Date: 10-2020
Delivering a cell therapy
Publisher: Elsevier BV
Date: 06-2015
Galaxy And Mass Assembly (GAMA): the unimodal nature of the dwarf galaxy population
Publisher: Oxford University Press (OUP)
Date: 02-12-2014
Galaxy And Mass Assembly (GAMA): stellar mass estimates
Publisher: Oxford University Press (OUP)
Date: 18-11-2011
The interaction of linear polyphosphates with titanium dioxide surfaces
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/B001213K
Two-phase galaxy evolution: the cosmic star formation histories of spheroids and discs
Publisher: Oxford University Press (OUP)
Date: 03-2013
DOI: 10.1093/MNRAS/STS717
A Proposal for Enhanced Supervision of the Refugee Convention
Publisher: Oxford University Press (OUP)
Date: 09-2013
DOI: 10.1093/JRS/FET021
Galaxy and Mass Assembly (GAMA)
Publisher: Oxford University Press (OUP)
Date: 14-04-2018
DOI: 10.1093/MNRAS/STY933
The environment and characteristics of low-redshift galaxies detected by the Herschel-ATLAS
Publisher: Oxford University Press (OUP)
Date: 24-10-2011
Galaxy And Mass Assembly (GAMA): Structural Investigation of Galaxies via Model Analysis
Publisher: Oxford University Press (OUP)
Date: 03-2012
Approaches to Quantify Amine Groups in the Presence of Hydroxyl Functional Groups in Plasma Polymerized Thin Films
Publisher: Wiley
Date: 11-07-2014
The variation of the galaxy luminosity function with group properties
Publisher: Oxford University Press (OUP)
Date: 21-04-2010
The effect of deposition of negatively charged particles on the electrokinetic behaviour of oppositely charged surfaces
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/B001277G
Galaxy And Mass Assembly: the G02 field, Herschel–ATLAS target selection and data release 3
Publisher: Oxford University Press (OUP)
Date: 24-11-2017
Effective in-situ chemical surface modification of forward osmosis membranes with polydopamine-induced graphene oxide for biofouling mitigation
Publisher: Elsevier BV
Date: 05-2016
Covalently bonded interfaces for polymer/graphene composites
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA01277H
Galaxy And Mass Assembly: the 1.4 GHz SFR indicator, SFR–M*relation and predictions for ASKAP–GAMA
Publisher: Oxford University Press (OUP)
Date: 30-11-2016
From carbon nanotubes and silicate layers to graphene platelets for polymer nanocomposites
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2NR30837A
Abstract: In spite of extensive studies conducted on carbon nanotubes and silicate layers for their polymer-based nanocomposites, the rise of graphene now provides a more promising candidate due to its exceptionally high mechanical performance and electrical and thermal conductivities. The present study developed a facile approach to fabricate epoxy-graphene nanocomposites by thermally expanding a commercial product followed by ultrasonication and solution-compounding with epoxy, and investigated their morphologies, mechanical properties, electrical conductivity and thermal mechanical behaviour. Graphene platelets (GnPs) of 3.57 ± 0.50 nm in thickness were created after the expanded product was dispersed in tetrahydrofuran using 60 min ultrasonication. Since epoxy resins cured by various hardeners are widely used in industries, we chose two common hardeners: polyoxypropylene (J230) and 4,4'-diaminodiphenylsulfone (DDS). DDS-cured nanocomposites showed a better dispersion and exfoliation of GnPs, a higher improvement (573%) in fracture energy release rate and a lower percolation threshold (0.612 vol%) for electrical conductivity, because DDS contains benzene groups which create π-π interactions with GnPs promoting a higher degree of dispersion and exfoliation of GnPs during curing. This research pointed out a potential trend where GnPs would replace carbon nanotubes and silicate layers for many applications of polymer nanocomposites.
Fine-Tuning the Surface of Forward Osmosis Membranes via Grafting Graphene Oxide: Performance Patterns and Biofouling Propensity
Publisher: American Chemical Society (ACS)
Date: 06-08-2015
Abstract: Graphene oxide (GO) nanosheets were attached to the polyamide selective layer of thin film composite (TFC) forward osmosis (FO) membranes through a poly L-Lysine (PLL) intermediary using either layer-by-layer or hybrid (H) grafting strategies. Fourier transform infrared spectroscopy, zeta potential, and thermogravimetric analysis confirmed the successful attachment of GO/PLL, the surface modification enhancing both the hydrophilicity and smoothness of the membrane's surface demonstrated by water contact angle, atomic force microscopy, and transmission electron microscopy. The biofouling resistance of the FO membranes determined using an adenosine triphosphate bioluminescence test showed a 99% reduction in surviving bacteria for GO/PLL-H modified membranes compared to pristine membrane. This antibiofouling property of the GO/PLL-H modified membrane was reflected in reduced flux decline compared to all other s les when filtering brackish water under biofouling conditions. Further, the high density and tightly bound GO nanosheets using the hybrid modification reduced the reverse solute flux compared to the pristine, which reflects improved membrane selectivity. These results illustrate that the GO/PLL-H modification is a valuable addition to improve the performance of FO TFC membranes.
Galaxy and Mass Assembly (GAMA): ugriz galaxy luminosity functions
Publisher: Oxford University Press (OUP)
Date: 12-12-2011
Galaxy And Mass Assembly (GAMA): The mechanisms for quiescent galaxy formation at z < 1
Publisher: Oxford University Press (OUP)
Date: 02-10-2017
pH-tunable gradients of wettability and surface potential
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2SM25221J
Tailoring the surface functionalities of titania nanotube arrays
Publisher: Elsevier BV
Date: 2010
DOI: 10.1016/J.BIOMATERIALS.2009.09.074
Abstract: Nanotubular titanium oxide (TiO(2)) produced by self-ordering processes using electrochemical anodization have been extensively explored in recent years as a new biomaterial for implants, drug delivery systems, cell growth, biosensors, immunoisolations, bioartificial organs and tissue engineering. Chemical inertness is the main weakness of this material when placed in contact with biological systems and surface modification is a possible solution of this problem. The aim of this study is to develop a flexible and facile method for surface modification of TiO(2) nanotubes to tailor new interfacial properties important in many biomedical applications. TiO(2) nanotubes were prepared by electrochemical anodization of titanium foil using ethylene glycol: NH(4)F electrolyte (2% water and 0.3% NH(4)F). Plasma surface modification using allylamine (AA) as a precursor has been applied to generate a thin and chemically reactive polymer (AAPP) film rich in amine groups on top of the TiO(2) nanotube surface. This initial polymer film was used for further surface functionalization by attachment of desired molecules. Two modification techniques were used to demonstrate the flexibility for building of new functionalities on titania nanotube surface: electrostatic adsorption of poly(sodium styrenesulfonate) (PSS) as an ex le of layer-by-layer assembly (LbL), and covalent coupling of poly(ethylene glycol) (PEG) as an ex le of creating a protein-resistant surface. These approaches for tailoring the surface chemistry and wettability of TiO(2) nanotubes offer considerable prospects for advancing their interfacial properties to improve existing and develop new functional biomaterials for erse biomedical applications.
An Experimental and Analytical Study of an Asymmetric Capacitively Coupled Plasma Used for Plasma Polymerization
Publisher: Wiley
Date: 04-06-2014
Gradient technologies for optimising biomaterials for cell screening
Publisher: Elsevier BV
Date: 06-2015
Defining Plasma Polymerization: New Insight Into What We Should Be Measuring
Publisher: American Chemical Society (ACS)
Date: 14-06-2013
DOI: 10.1021/AM401484B
Abstract: External parameters (RF power and precursor flow rate) are typically quoted to define plasma polymerization experiments. Utilizing a parallel-plate electrode reactor with variable geometry, it is shown that these parameters cannot be transferred to reactors with different geometries in order to reproduce plasma polymer films using four precursors. Measurements of ion flux and power coupling efficiency confirm that intrinsic plasma properties vary greatly with reactor geometry at constant applied RF power. It is further demonstrated that controlling intrinsic parameters, in this case the ion flux, offers a more widely applicable method of defining plasma polymerization processes, particularly for saturated and allylic precursors.
Galaxy And Mass Assembly (GAMA): in search of Milky Way Magellanic Cloud analogues
Publisher: Oxford University Press (OUP)
Date: 27-06-2012
Furfuryl methacrylate plasma polymers for biomedical applications
Publisher: American Vacuum Society
Date: 09-2016
DOI: 10.1116/1.4962267
Abstract: Furfuryl methacrylate (FMA) is a promising precursor for producing polymers for biomedical and cell therapy applications. Herein, FMA plasma polymer coatings were prepared with different powers, deposition times, and flow rates. The plasma polymer coatings were characterized using atomic force microscopy (AFM), scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The results from AFM and SEM show the early growth of the coatings and the existence of particle aggregates on the surfaces. XPS results indicated no measureable chemical differences between the deposited films produced under different power and flow rate conditions. ToF-SIMS analysis demonstrated differing amounts of C5H5O (81 m/z) and C10H9O2 (161 m/z) species in the coatings which are related to the furan ring structure. Through judicious choice of plasma polymerization parameters, the quantity of the particle aggregates was reduced, and the fabricated plasma polymer coatings were chemically uniform and smooth. Primary human fibroblasts were cultured on FMA plasma polymer surfaces to determine the effect of surface chemical composition and the presence of particle aggregates on cell culture. Particle aggregates were shown to inhibit fibroblast attachment and proliferation.
Development of Advanced Dressings for the Delivery of Progenitor Cells
Publisher: American Chemical Society (ACS)
Date: 19-01-2017
Abstract: Culture surfaces that substantially reduce the degree of cell manipulation in the delivery of cell sheets to patients are described. These surfaces support the attachment, culture, and delivery of multipotent adult progenitor cells (MAPC). It was essential that the processes of attachment/detachment to the surface did not affect cell phenotype nor the function of the cultured cells. Both acid-based and amine-based surface coatings were generated from acrylic acid, propanoic acid, diaminopropane, and heptylamine precursors, respectively. While both functional groups supported cell attachment/detachment, amine coated surfaces gave optimal performance. X-ray photoelectron spectroscopy (XPS) showed that at a primary amine to carbon surface ratio of between 0.01 and 0.02, greater than 90% of attached cells were effectively transferred to a model wound bed. A dependence on primary amine concentration has not previously been reported. After 48 h of culture on the optimized amine surface, PCR, functional, and viability assays showed that MAPC retained their stem cell phenotype, full metabolic activity, and biological function. Consequently, in a proof of concept experiment, it was shown that this amine surface when coated onto a surgical dressing provides an effective and simple technology for the delivery of MAPC to murine dorsal excisional wounds, with MAPC delivery verified histologically. By optimizing for cell delivery using a combination of in vitro and in vivo techniques, we developed an effective surface for the delivery of MAPC in a clinically relevant format.
Porous silicon membrane-modified electrodes for label-free voltammetric detection of MS2 bacteriophage
Publisher: Elsevier BV
Date: 06-2016
Where physics meets chemistry: Thin film deposition from reactive plasmas
Publisher: Springer Science and Business Media LLC
Date: 12-2016
On the Effect of Monomer Chemistry on Growth Mechanisms of Nonfouling PEG-like Plasma Polymers
Publisher: American Chemical Society (ACS)
Date: 13-02-2013
DOI: 10.1021/LA304713B
Abstract: It has been shown that both ions and neutral species may contribute to plasma polymer growth. However, the relative contribution from these mechanisms remains unclear. We present data elucidating the importance of considering monomer structure with respect to which the growth mechanism dominates for nonfouling PEG-like plasma polymers. The deposition rate for saturated monomers is directly linked with ion flux to the substrate. For unsaturated monomers, the neutral flux also plays a role, particularly at low power. Increased fragmentation of the monomer at high power reduces the ability of unsaturated monomers to grow via neutral grafting. Chemical characterization by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) confirm the role that plasma phase fragmentation plays in determining the deposition rate and surface chemistry of the deposited film. The simple experimental method used here may also be used to determine which mechanisms dominate plasma deposition for other monomers. This knowledge may enable significant improvement in future reactor design and process control.
Galaxy And Mass Assembly (GAMA): Panchromatic Data Release (far-UV–far-IR) and the low-zenergy budget
Publisher: Oxford University Press (OUP)
Date: 03-12-2015
Epoxy/graphene nanocomposites prepared by in-situ microwaving
Publisher: Elsevier BV
Date: 06-2021
Galaxy and Mass Assembly: FUV, NUV, ugrizYJHK Petrosian, Kron and Sérsic photometry
Publisher: Oxford University Press (OUP)
Date: 12-2010
GAMA/G10-COSMOS/3D-HST: the 0 < z < 5 cosmic star formation history, stellar-mass, and dust-mass densities
Publisher: Oxford University Press (OUP)
Date: 11-12-2017
Product placement practices in prime-time television programmes in Hong Kong
Publisher: Informa UK Limited
Date: 27-07-2018
Galaxy and Mass Assembly (GAMA): Morphological transformation of galaxies across the green valley
Publisher: Oxford University Press (OUP)
Date: 22-01-2018
DOI: 10.1093/MNRAS/STY124
Thin film growth on biomaterial surfaces
Publisher: Elsevier
Date: 2016
The chemistry of organophosphate thin film coatings from low pressure plasma and the effect of the substrate on adhesion
Publisher: Wiley
Date: 03-07-2017
Control of slime coatings by the use of anionic phosphates: A fundamental study
Publisher: Elsevier BV
Date: 09-2000
Systems failure, market failure, or something else? The case of skills development in Australian innovation policy
Publisher: Informa UK Limited
Date: 23-09-2015
Chemical and physical processes in the retention of functional groups in plasma polymers studied by plasma phase mass spectroscopy
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP05850C
Abstract: Retention of functional groups in plasma polymers depend on plasma chemistry and physical surface processes.
Promiscuous hydrogen in polymerising plasmas
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CP08166A
Abstract: The multiple roles hydrogen plays in depositing plasmas is investigated by addition of H 2 O and D 2 O to ethyltrimethylacetate plasmas.
Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release
Publisher: Oxford University Press (OUP)
Date: 02-03-2011
Deposition of 2‐oxazoline‐based plasma polymer coatings using atmospheric pressure helium plasma jet
Publisher: Wiley
Date: 08-2019
Free-standing composite hydrogel films for superior volumetric capacitance
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03113C
Abstract: Flexible, free-standing, high-performance supercapacitor electrodes were created by the development of a conducting composite hydrogel where graphene oxide sheets were in situ reduced by polyaniline.
Galaxy And Mass Assembly (GAMA): growing up in a bad neighbourhood – how do low-mass galaxies become passive?
Publisher: Oxford University Press (OUP)
Date: 03-12-2015
Deep Extragalactic VIsible Legacy Survey (DEVILS): motivation,design, and target catalogue
Publisher: Oxford University Press (OUP)
Date: 14-06-2018
High conductivity PEDOT resulting from glycol/oxidant complex and glycol/polymer intercalation during vacuum vapour phase polymerisation
Publisher: Elsevier BV
Date: 04-2011
The link between mechanisms of deposition and the physico-chemical properties of plasma polymer films
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3SM51039E
Synthesis of highly functionalised plasma polymer films from protonated precursor ions via the plasma α–γ transition
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6CP08630F
Abstract: Functional group retention in plasma polymers is maximised by tuning the pressure ower to the α to γ transition.
Secrets of plasma-deposited polyoxazoline functionality lie in the plasma phase
Publisher: American Chemical Society (ACS)
Date: 29-09-2017
High-performance supercapacitors using graphene/polyaniline composites deposited on kitchen sponge
Publisher: IOP Publishing
Date: 26-01-2015
DOI: 10.1088/0957-4484/26/7/075702
Abstract: We in this study used a commercial grade kitchen sponge as the scaffold where both graphene platelets (GnPs) and polyaniline (PANi) nanorods were deposited. The high electrical conductivity of GnPs (1460 S cm(-1)) enhances the pseudo-capacitive performance of PANi grown vertically on the GnPs basal planes the interconnected pores of the sponge provide sufficient inner surface between the GnPs/PANi composite and the electrolyte, which thus facilitates ion diffusion during charge and discharge processes. When the composite electrode was used to build a supercapacitor with two-electrode configuration, it exhibited a specific capacitance of 965.3 F g(-1) at a scan rate of 10 mV s(-1) in 1.0 M H2SO4 solution. In addition, the composite Nyquist plot showed no semicircle at high frequency corresponding to a low equivalent series resistance of 0.35 Ω. At 100 mV s(-1), the supercapacitor demonstrated an energy density of 34.5 Wh kg(-1) and a power density of 12.4 kW kg(-1) based on the total mass of the active materials on both electrodes. To demonstrate the performance, we built an array consisting of three cells connected in series, which lit up a red light emitting diode for five minutes. This simple method holds promise for high-performance yet low-cost electrodes for supercapacitors.
Galaxy and mass assembly (GAMA): the consistency of GAMA and WISE derived mass-to-light ratios
Publisher: Oxford University Press (OUP)
Date: 13-09-2017
Fabrication and characterization of biorenewable plasma polymer films using sandalwood oil precursor
Publisher: Wiley
Date: 09-04-2020
DOI: 10.1002/APP.49288
Processable 3-nm thick graphene platelets of high electrical conductivity and their epoxy composites
Publisher: IOP Publishing
Date: 27-02-2014
DOI: 10.1088/0957-4484/25/12/125707
Abstract: Graphene platelets (GnPs) are a class of novel 2D nanomaterials owing to their very small thickness (∼3 nm), high mechanical strength and electric conductivity (1460 S cm(-1)), and good compatibility with most polymers as well as cost-effectiveness. In this paper we present a low-cost processing technique for producing modified GnPs and an investigation of the electrical and mechanical properties of the resulting composites. After dispersing GnPs in solvent N-methyl-2-pyrrolidone, a long-chain surfactant (Jeffamine D 2000, denoted J2000) was added to covalently modify GnPs, yielding J2000-GnPs. By adjusting the ratio of GnPs to the solvent, the modified GnPs show different average thickness and thus electrical conductivity ranging from 694 to 1200 S cm(-1). To promote the exfoliation and dispersion of J2000-GnPs in a polymeric matrix, they were dispersed in the solvent again and further modified using diglycidyl ether of bisphenol A (DGEBA) producing m-GnPs, which were then compounded with an epoxy resin for the development of epoxy/m-GnP composites. A percolation threshold of electrical volume resistivity for the resulting composites was observed at 0.31 vol%. It was found that epoxy/m-GnP composites demonstrated far better mechanical properties than those of unmodified GnPs of the same volume fraction. For ex le, m-GnPs at 0.25 vol% increased the fracture energy release rate G1c from 0.204 ± 0.03 to 1.422 ± 0.24 kJ m(-2), while the same fraction of unmodified GnPs increased G1c to 1.01 ± 0.24 kJ m(-2). The interface modification also enhanced the glass transition temperature of neat epoxy from 58.9 to 73.8 °C.
Role of Positive Ions in Determining the Deposition Rate and Film Chemistry of Continuous Wave Hexamethyl Disiloxane Plasmas
Publisher: American Chemical Society (ACS)
Date: 06-09-2011
DOI: 10.1021/LA202010N
Abstract: New data shed light on the mechanisms of film growth from low power, low pressure plasmas of organic compounds. These data rebalance the widely held view that plasma polymer formation is due to radical/neutral reactions only and that ions play no direct role in contributing mass at the surface. Ion reactions are shown to play an important role in both the plasma phase and at the surface. The mass deposition rate and ion flux in continuous wave hexamethyl disiloxane (HMDSO) plasmas have been studied as a function of pressure and applied RF power. Both the deposition rate and ion flux were shown to increase with applied power however, the deposition rate increased with pressure while the ion flux decreased. Positive ion mass spectrometry of the plasma phase demonstrates that the dominant ionic species is the (HMDSO-CH(3))(+) ion at m/z 147, but significant fragmentation and subsequent oligomerization was also observed. Chemical analysis of the deposits by X-ray photoelectron spectroscopy and secondary ion mass spectrometry show that the deposits were consistent with deposits reported by previous workers grown from plasma and hyperthermal (HMDSO-CH(3))(+) ions. Increasing coordination of silicon with oxygen in the plasma deposits reveals the role of ions in the growth of plasma polymers. Comparing the calculated film thicknesses after a fixed total fluence of 1.5 × 10(19) ions/m(2) to results for hyperthermal ions shows that ions can contribute significantly to the total absorbed mass in the deposits.
Gradient technology for high-throughput screening of interactions between cells and nanostructured materials
Publisher: Hindawi Limited
Date: 2012
DOI: 10.1155/2012/839053
Abstract: We present a novel substrate suitable for the high-throughput analysis of cell response to variations in surface chemistry and nanotopography. Electrochemical etching was used to produce silicon wafers with nanopores between 10 and 100 nm in diameter. Over this substrate and flat silicon wafers, a gradient film ranging from hydrocarbon to carboxylic acid plasma polymer was deposited, with the concentration of surface carboxylic acid groups varying between 0.7 and 3% as measured by XPS. MG63 osteoblast-like cells were then cultured on these substrates and showed greatest cell spreading and adhesion onto porous silicon with a carboxylic acid group concentration between 2-3%. This method has great potential for high-throughput screening of cell-material interaction with particular relevance to tissue engineering.
On the effects of atmospheric-pressure microplasma array treatment on polymer and biological materials
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA42025F
Surface Morphology in the Early Stages of Plasma Polymer Film Growth from Amine‐Containing Monomers
Publisher: Wiley
Date: 15-03-2011
Label-Free Bacterial Toxin Detection in Water Supplies Using Porous Silicon Nanochannel Sensors
Publisher: American Chemical Society (ACS)
Date: 29-05-2019
Rational approaches for optimizing chemical functionality of plasma polymers: A case study with ethyl trimethylacetate
Publisher: Wiley
Date: 07-12-2020
Facile Fabrication of Graphene Membranes with Readily Tunable Structures
Publisher: American Chemical Society (ACS)
Date: 16-06-2015
DOI: 10.1021/AM5091287
Abstract: Advanced membranes that combine mechanical robustness with fast permeation are crucial to many applications such as water purification, ions selectivity, and gas separation. Graphene sheets offer a promising opportunity to fabricate thin, high-flux, and pressure-endurable membranes because of their unique 2D morphology, oxidizable surface, and electrical conductivity. We herein report a highly effective yet simple approach to the fabrication of graphene membranes featuring controllable oxidation degrees and thus tunable structures and properties. The graphene sheets comprise a single or a few layers with a lateral dimension of 50-100 nm their C/O ratios can be manipulated from 4.1 for graphene with a low degree of oxidation (low-oxidation graphene) to 2.5 for medium-oxidation graphene to 1.3 for high-oxidation graphene, by controlling the proportion of phosphoric acid during the 60 min fabrication. Fabricated by simple vacuum filtration, the membranes exhibited various water flux from 200.0 to 20.0 L/m(2)·h·bar at 3 bar of pressure and mechanical robustness (Young's modulus can be up to 20 GPa and tensile strength to 100 MPa). When these membranes were used as electrodes for supercapacitors, specific capacitances of 58.8 F/g and 23.5 F/cm(3) were recorded for the low-oxidation graphene membrane at 1 A/g by a two-electrode configuration the capacity values retained ∼95% after 800 cycles the high capacitance would be caused by moderate wettability and high electrical conductivity.
Galaxy And Mass Assembly (GAMA): $\mathcal {M_\star }\text{--}R_{\rm e}$ relations ofz= 0 bulges, discs and spheroids
Publisher: Oxford University Press (OUP)
Date: 06-07-2016
Combined effect of protein and oxygen on reactive oxygen and nitrogen species in the plasma treatment of tissue
Publisher: AIP Publishing
Date: 07-09-2015
DOI: 10.1063/1.4930874
Abstract: The influence of protein and molecular, ground state oxygen (O2) on the plasma generation, and transport of reactive oxygen and nitrogen species (RONS) in tissue are investigated. A tissue target, comprising a 1 mm thick gelatin film (a surrogate for real tissue), is placed on top of a 96-well plate each well is filled with phosphate buffered saline (PBS, pH 7.4) containing one fluorescent or colorimetric reporter that is specific for one of three RONS (i.e., H2O2, NO2−, or OH•) or a broad spectrum reactive oxygen species reporter (2,7-dichlorodihydrofluorescein). A helium cold atmospheric plasma (CAP) jet contacts the top of the gelatin surface, and the concentrations of RONS generated in PBS are measured on a microplate reader. The data show that H2O2, NO2−, or OH• are generated in PBS underneath the target. Independently, measurements are made of the O2 concentration in the PBS with and without the gelatin target. Adding bovine serum albumin protein to the PBS or gelatin shows that protein either raises or inhibits RONS depending upon the O2 concentration. Our results are discussed in the context of plasma-soft tissue interactions that are important in the development of CAP technology for medicine, biology, and food manufacturing.
Galaxy And Mass Assembly (GAMA): the 0.013 < z < 0.1 cosmic spectral energy distribution from 0.1 m to 1 mm
Publisher: Oxford University Press (OUP)
Date: 21-12-2012
Plasma Parameter Aspects in the Fabrication of Stable Amine Functionalized Plasma Polymer Films
Publisher: Wiley
Date: 12-02-2015
The new galaxy evolution paradigm revealed by the Herschel surveys
Publisher: Oxford University Press (OUP)
Date: 12-10-2017
Single-Step Assembly of Multifunctional Poly(tannic acid)-Graphene Oxide Coating to Reduce Biofouling of Forward Osmosis Membranes
Publisher: American Chemical Society (ACS)
Date: 29-06-2016
Abstract: Graphene oxide (GO) nanosheets have antibacterial properties that have been exploited as a biocidal agent used on desalination membrane surfaces in recent research. Nonetheless, improved strategies for efficient and stable attachment of GO nanosheets onto the membrane surface are still required for this idea to be commercially viable. To address this challenge, we adopted a novel, single-step surface modification approach using tannic acid cross-linked with polyethylene imine as a versatile platform to immobilize GO nanosheets to the surface of polyamide thin film composite forward osmosis (FO) membranes. An experimental design based on Taguchi's statistical method was applied to optimize the FO processing conditions in terms of water and reverse solute fluxes. Modified membranes were analyzed using water contact angle, adenosine triphosphate bioluminescence, total organic carbon, Fourier transform infrared spectroscopy, ζ potential, X-ray photoelectron spectroscopy, transmission electron microscopy, and atomic force microscopy. These results show that membranes were modified with a nanoscale (<10 nm), smooth, hydrophilic coating that, compared to pristine membranes, improved filtration and significantly mitigated biofouling by 33% due to its extraordinary, synergistic antibacterial properties (99.9%).
Multidentate polyzwitterion attachment to polydopamine modified ultrafiltration membranes for dairy processing: Characterization, performance and durability
Publisher: Elsevier BV
Date: 05-2018
A Facile Approach to Chemically Modified Graphene and its Polymer Nanocomposites
Publisher: Wiley
Date: 10-04-2012
A LARGE POPULATION OF ULTRA-COMPACT DWARFS AND BRIGHT INTRACLUSTER GLOBULARS IN THE FORNAX CLUSTER
Publisher: American Astronomical Society
Date: 19-12-2008
Deposition of nonfouling plasma polymers to a thermoplastic silicone elastomer for microfluidic and biomedical applications
Publisher: Wiley
Date: 12-02-2014
DOI: 10.1002/APP.40500
Elastomer nanocomposites containing MXene for mechanical robustness and electrical and thermal conductivity
Publisher: IOP Publishing
Date: 19-05-2020
Galaxy And Mass Assembly (GAMA): stellar mass functions by Hubble type
Publisher: Oxford University Press (OUP)
Date: 29-08-2014
Early Stages of Growth of Plasma Polymer Coatings Deposited from Nitrogen‐ and Oxygen‐Containing Monomers
Publisher: Wiley
Date: 16-07-2010
Abstract: Ultrathin functional coatings deposited by plasma polymerization have utility in nano‐ and microtechnologies, however, until now very little has been reported to validate the widely held view that these coatings can be deposited onto any type of substrate, without substrate influence. In order to ascertain the role of the substrate in the early stages of plasma growth we address the growth rate and chemistry of plasma polymer coatings from two nitrogen‐ and two oxygen‐containing monomers during the first stages of deposition onto gold and onto thiol MUA‐coated gold surfaces. SPR thickness measurements and XPS analyzes indicate the substrate must be taken into account when ultrathin plasma polymer coatings are used for surface modification and we speculate on why this should be so. magnified image
H-ATLAS/GAMA: quantifying the morphological evolution of the galaxy population using cosmic calorimetry
Publisher: Oxford University Press (OUP)
Date: 20-08-2015
The importance of ions in low pressure PECVD plasmas
Publisher: Frontiers Media SA
Date: 04-02-2015
Binding of nanoparticles to aminated plasma polymer surfaces is controlled by primary amine density and solution pH
Publisher: American Chemical Society (ACS)
Date: 11-06-2018
Galaxy and Mass Assembly (GAMA): the GAMA galaxy group catalogue (G3Cv1)
Publisher: Oxford University Press (OUP)
Date: 26-07-2011
Cell sheets in cell therapies
Publisher: Elsevier BV
Date: 02-2018
DOI: 10.1016/J.JCYT.2017.11.004
Abstract: This review aims to provide a broad introduction to the use of cell sheets and the role of materials in the delivery of cell sheets to patients within a clinical setting. Traditionally, cells sheets have been, and currently are, fabricated using established and accepted cell culture methods within standard formats (e.g., petri dishes) utilizing biological substrates. Synthetic surfaces provide a far more versatile system for culturing and delivering cell sheets. This has the potential to positively affect quality, and efficient, localized cell delivery has a significant impact on patient outcome and on the overall cost of goods. We highlight current applications of these advanced carriers and future applications of these surfaces and cell sheets with an emphasis both on clinical use and regulatory requirements.
The interaction of linear polyphosphates with zincite surfaces
Publisher: Elsevier BV
Date: 2003
Galaxy And Mass Assembly (GAMA): mass–size relations of z < 0.1 galaxies subdivided by Sérsic index, colour and morphology
Publisher: Oxford University Press (OUP)
Date: 10-01-2015
Surface hydrophilic modification of RO membranes by plasma polymerization for low organic fouling
Publisher: Elsevier BV
Date: 03-2011
Galaxy And Mass Assembly (GAMA): the galaxy stellar mass function to z = 0.1 from the r-band selected equatorial regions
Publisher: Oxford University Press (OUP)
Date: 11-05-2017
Development of polymer composites using modified, high-structural integrity graphene platelets
Publisher: Elsevier BV
Date: 2014
Variability in plasma polymerization processes - An international round-robin study
Publisher: Wiley
Date: 17-06-2013
Structural Characterization of γ-Terpinene Thin Films Using Mass Spectroscopy and X-Ray Photoelectron Spectroscopy
Publisher: Wiley
Date: 03-04-2015
Advancement in liquid exfoliation of graphite through simultaneously oxidizing and ultrasonicating
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA04367G
Abstract: Simultaneously oxidizing and ultrasonicating graphite for 60 min can create high-structural integrity yet solution-processable graphene for a great many applications.
A new method for preparation of functionalized graphene and its epoxy nanocomposites
Publisher: Elsevier BV
Date: 09-2020
GAMA/H-ATLAS: the local dust mass function and cosmic density as a function of galaxy type – a benchmark for models of galaxy evolution
Publisher: Oxford University Press (OUP)
Date: 05-06-2018
Abstract: We present the dust mass function (DMF) of 15 750 galaxies with redshift $z$ & 0.1, drawn from the overlapping area of the GAMA and H-ATLAS surveys. The DMF is derived using the density corrected Vmax method, where we estimate Vmax using: (i) the normal photometric selection limit (pVmax) and (ii) a bivariate brightness distribution (BBD) technique, which accounts for two selection effects. We fit the data with a Schechter function, and find $M^{*}=(4.65 \\pm 0.18)\\times 10^{7}\\,h^2_{70}\\, \\mathrm{ M}_{\\odot }$, α = (−1.22 ± 0.01), $\\phi ^{*}=(6.26 \\pm 0.28)\\times 10^{-3}\\,h^3_{70}\\,\\rm Mpc^{-3}\\,dex^{-1}$. The resulting dust mass density parameter integrated down to 104 M⊙ is Ωd = (1.11 ± 0.02) × 10−6 which implies the mass fraction of baryons in dust is $f_{m_\\mathrm{ b}}=(2.40\\pm 0.04)\\times 10^{-5}$ cosmic variance adds an extra 7–17 per cent uncertainty to the quoted statistical errors. Our measurements have fewer galaxies with high dust mass than predicted by semi-analytic models. This is because the models include too much dust in high stellar mass galaxies. Conversely, our measurements find more galaxies with high dust mass than predicted by hydrodynamical cosmological simulations. This is likely to be from the long time-scales for grain growth assumed in the models. We calculate DMFs split by galaxy type and find dust mass densities of Ωd = (0.88 ± 0.03) × 10−6 and Ωd = (0.060 ± 0.005) × 10−6 for late types and early types, respectively. Comparing to the equivalent galaxy stellar mass functions (GSMF) we find that the DMF for late types is well matched by the GSMF scaled by (8.07 ± 0.35) × 10−4.
Plasma Polymer and Biomolecule Modification of 3D Scaffolds for Tissue Engineering
Publisher: Wiley
Date: 25-01-2016
Particle aggregates formed during furfuryl methacrylate plasma polymerization affect human mesenchymal stem cell behaviour
Publisher: Elsevier BV
Date: 2018
DOI: 10.1016/J.COLSURFB.2017.10.065
Abstract: Human Mesenchymal Stem cells (hMSCs) are becoming a major focus in biomedical fields. Application of in vitro expanded hMSCs to treat numerous ailments has led to a commercial emphasis on improving hMSC growth ex vivo. Production of substrate independent, novel thin films is one potential tool for production of commercial viable hMSC expansion. Plasma polymerization allow controlled chemical optimisation of large scale surface areas in a substrate independent manner. Previous study shown that plasma polymerized Furfuryl Methacrylate (ppFMA) surfaces allowed primary fibroblast cells adhesion and proliferation. However, under some deposition conditions, particle aggregates formation was observed. These aggregates had the effect of disrupting cell attachment, despite being chemically indistinguishable from the underlying surface. Herein, hMSCs were cultured on ppFMA surfaces to determine their suitability for stem cell culture and observe the effect of particle aggregates on hMSC attachment and growth. Both metabolic and DNA quantification assays showed that surfaces with particle aggregates had lower numbers of attached cells and slower growth. Uniform surfaces without aggregates showed higher cell attachment and growth levels, which were comparable to Thermanox. Phenotypic analysis showed that there was no change to hMSCs phenotype after 7 & 14days of culture on uniform ppFMA surface. Further investigation using time-lapse image analysis indicated that particle aggregates reduced cell attachment by presenting a physically weak boundary layer, which was damaged by intracellular tension during cell spreading. ppFMA surface can provide a stable substrate independent hMSCs expansion interface that could be applied to larger scale bioreactors, beads or scaffolds.
Galaxy And Mass Assembly (GAMA): spectroscopic analysis
Publisher: Oxford University Press (OUP)
Date: 07-02-2013
DOI: 10.1093/MNRAS/STT030
Nanoscale deposition of chemically functionalised films via plasma polymerisation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA41563E
Galaxy And Mass Assembly: the evolution of the cosmic spectral energy distribution from z = 1 to z = 0
Publisher: Oxford University Press (OUP)
Date: 25-05-2017
Cover Picture: Plasma Process. Polym. 10/2019
Publisher: Wiley
Date: 10-2019
Substrate influence on the initial growth phase of plasma-deposited polymer films
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B904367E
Abstract: In this communication we demonstrate that in the initial stages of deposition of ultrathin plasma polymer films, both the growth rate and the chemical composition of the films are affected by the nature of the substrate which is an important question surprisingly neglected until now.
Versatile gradients of chemistry, bound ligands and nanoparticles on alumina nanopore arrays
Publisher: IOP Publishing
Date: 14-09-2011
DOI: 10.1088/0957-4484/22/41/415601
Abstract: Nanoporous alumina (PA) arrays produced by self-ordering growth, using electrochemical anodization, have been extensively explored for potential applications based upon the unique thermal, mechanical and structural properties, and high surface-to-volume ratio of these materials. However, the potential applications and functionality of these materials may be further extended by molecular-level engineering of the surface of the pore rims. In this paper we present a method for the generation of chemical gradients on the surface of PA arrays based upon plasma co-polymerization of two monomers. We further extend these chemical gradients, which are also gradients of surface charge, to those of bound ligands and number density gradients of nanoparticles. The latter represent a highly exotic new class of materials, comprising aligned PA, capped by gold nanoparticles around the rim of the pores. Gradients of chemistry, ligands and nanoparticles generated by our method retain the porous structure of the substrate, which is important in applications that take advantage of the inherent properties of these materials. This method can be readily extended to other porous materials.
The influence of substrate stiffness gradients on primary human dermal fibroblasts
Publisher: Elsevier BV
Date: 07-2013
DOI: 10.1016/J.BIOMATERIALS.2013.03.075
Abstract: Materials mechanical properties are known to be an important regulator of cellular processes such as proliferation, differentiation and migration, and have seen increasing attention in recent years. At present, there are only few approaches where the mechanical properties of thin films can be controllably varied across an entire surface. In this work, we present a technique for controlled generation of gradients of surface elastic moduli involving a weak polyelectrolyte multilayer (PEM) system of approximately 100 nm thickness and time dependent immersion in a solution of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) as a crosslinking agent. Uniform surface chemistry across the gradient and wettability was provided by the addition of a 10 nm thick plasma polymer layer deposited from vapour of either allylamine or acrylic acid. We used the resultant stiffness gradients (0.5-110 MPa in hydrated state) to investigate the adhesion, morphology and proliferation on human dermal fibroblasts (HDFs). We show that substrate mechanical properties strongly influence HDF cell fate. We also found that in the experimental range of surface properties used in this study, the surface stiffness was a stronger driving force to cells fate compared to chemistry and wettability.
GAMA/H-ATLAS: linking the properties of submm detected and undetected early-type galaxies – I. z ≤ 0.06 sample
Publisher: Oxford University Press (OUP)
Date: 20-03-0031
DOI: 10.1093/MNRAS/STT310
Galaxy And Mass Assembly (GAMA): the life and times of L★ galaxies
Publisher: Oxford University Press (OUP)
Date: 08-03-2013
DOI: 10.1093/MNRAS/STT156
Melt compounding with graphene to develop functional, high-performance elastomers
Publisher: IOP Publishing
Date: 27-03-2013
DOI: 10.1088/0957-4484/24/16/165601
Abstract: Rather than using graphene oxide, which is limited by a high defect concentration and cost due to oxidation and reduction, we adopted cost-effective, 3.56 nm thick graphene platelets (GnPs) of high structural integrity to melt compound with an elastomer-ethylene-propylene-diene monomer rubber (EPDM)-using an industrial facility. An elastomer is an amorphous, chemically crosslinked polymer generally having rather low modulus and fracture strength but high fracture strain in comparison with other materials and upon removal of loading, it is able to return to its original geometry, immediately and completely. It was found that most GnPs dispersed uniformly in the elastomer matrix, although some did form clusters. A percolation threshold of electrical conductivity at 18 vol% GnPs was observed and the elastomer thermal conductivity increased by 417% at 45 vol% GnPs. The modulus and tensile strength increased by 710% and 404% at 26.7 vol% GnPs, respectively. The modulus improvement agrees well with the Guth and Halpin-Tsai models. The reinforcing effect of GnPs was compared with silicate layers and carbon nanotube. Our simple fabrication would prolong the service life of elastomeric products used in dynamic loading, thus reducing thermosetting waste in the environment.
The Physics of Plasma Ion Chemistry: A Case Study of Plasma Polymerization of Ethyl Acetate
Publisher: American Chemical Society (ACS)
Date: 11-11-2019
DOI: 10.1021/ACS.JPCLETT.9B02855
Abstract: Deposition chemistry from plasma is highly dependent on both the chemistry of the ions arriving at surfaces and the ion energy. Typically, when measuring the energy distribution of ions arriving at surfaces from plasma, it is assumed that the distributions are the same for all ionic species. Using ethyl acetate as a representative organic precursor molecule, we have measured the ion chemistry and ion energy as a function of pressure and power. We show that at low pressure (<2 Pa) this assumption is valid however, at elevated pressures ion-molecule collisions close to the deposition surface affect both the energy and chemistry of these ions. Smaller ions are formed close to the surface and have lower energy than larger ionic species which are formed in the bulk of the plasma. The changes in plasma chemistry therefore are closely linked to the physics of the plasma-surface interface.
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