ORCID Profile
0000-0001-8596-1801
Current Organisation
University of New South Wales
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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 Engineering | Transport Properties and Non-Equilibrium Processes | Functional Materials | Membrane and Separation Technologies
ANZSRC Socio-Economic Objective (SEO)
Oil and Gas Refining | Management of Liquid Waste from Mineral Resource Activities (excl. Water) | Management of Liquid Waste from Energy Activities (excl. Water) |
Related Links
Publications
Optical Characterisation of Non-Covalent Interactions between Non-Conjugated Polymers and Chemically Converted Graphene
Publisher: CSIRO Publishing
Date: 2014
DOI: 10.1071/CH13243
Abstract: Optical characterisation using dye molecules as probes was used to study the non-covalent interactions between chemically converted graphene (CCG) and non-conjugated, water soluble polymers in aqueous solution. The strong adsorption of non-conjugated polymers such as poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA) on CCG is observed by fluorescence and ultraviolet-visible spectroscopy and atomic force microscopy, and this leads to desorption of π-conjugated molecules from CCG. Such adsorption/desorption behaviour can be tailored by modifying the molecular weight of polymers and the chemistry of graphene. This finding provides a facile and non-covalent approach to the functionalisation of CCG and opens up new opportunities for the fabrication of graphene olymer nanocomposites.
Solvated Graphenes: An Emerging Class of Functional Soft Materials
Publisher: Wiley
Date: 26-11-2013
Abstract: From a materials science point of view, graphene is essentially a polymer having a giant, two-dimensional molecular configuration. In this Progress Report, solvated graphene and its derivatives are illustrated from the perspective of soft matter. Firstly, the key appealing features of graphene as a molecular building block for assembling bulk soft materials are highlighed. It is then demonstrated how the intersheet interactions in solution are correlated with the molecular structure of graphene, and how a combination of the unique molecular structure and colloidal interactions can lead to simple, solution-phase approaches for assembling graphenes into a variety of macroscopic nanoarchitectures. A number of new exciting functions and applications are also highlighted, which are enabled by the solvation effect and in particular, it is discussed why and how solvated graphenes can offer exciting functions that are unattainable with the dried, hard counterpart. The discussion is concluded with some personal perspectives on the future directions in which this emerging class of functional soft materials could be pursued.
Solvation-Involved Nanoionics: New Opportunities from 2D Nanomaterial Laminar Membranes
Publisher: Wiley
Date: 23-12-2020
Abstract: Nanoporous laminar membranes composed of multilayered 2D nanomaterials (2D-NLMs) are increasingly being exploited as a unique material platform for understanding solvated ion transport under nanoconfinement and exploring novel nanoionics-related applications, such as ion sieving, energy storage and harvesting, and in other new ionic devices. Here, the fundamentals of solvation-involved nanoionics in terms of ionic interactions and their effect on ionic transport behaviors are discussed. This is followed by a summary of key requirements for materials that are being used for solvation-involved nanoionics research, culminating in a demonstration of unique features of 2D-NLMs. Selected ex les of using 2D-NLMs to address the key scientific problems related to nanoconfined ion transport and storage are then presented to demonstrate their enormous potential and capabilities for nanoionics research and applications. To conclude, a personal perspective on the challenges and opportunities in this emerging field is presented.
Self-Supporting Graphene Hydrogel Film as an Experimental Platform to Evaluate the Potential of Graphene for Bone Regeneration
Publisher: Wiley
Date: 18-02-2013
Dynamic electrosorption analysis: a viable liquid-phase characterization method for porous carbon?
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA10801E
Molecular dynamics simulations of the electric double layer capacitance of graphene electrodes in mono-valent aqueous electrolytes
Publisher: Springer Science and Business Media LLC
Date: 2016
Protein adsorption on poly(N-isopropylacrylamide)-modified silicon surfaces: Effects of grafted layer thickness and protein size
Publisher: Elsevier BV
Date: 04-2010
DOI: 10.1016/J.COLSURFB.2009.12.006
Abstract: In this work, we investigated the protein adsorption on the end-tethered thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) brushes with varying grafted layer thickness prepared via surface-initiated atom transfer radical polymerization (SI-ATRP) on initiator-immobilized silicon surfaces. The thickness of a grafted layer was modulated by adjusting reaction time and/or solvent composition. The surface properties as a function of thickness were investigated by water contact angle, X-ray photoelectron spectroscopy (XPS), and atomic force microscope (AFM). The influence of PNIPAAm-grafted layer thickness on human serum albumin (HSA) adsorption in phosphate-buffered saline (PBS) (pH 7.4) at different temperature was evaluated using a radiolabeling method. In a lower thickness range (<15 nm), protein adsorption on PNIPAAm-grafted layer shows a thermoresponsive change in a certain extent, but the variation is not remarkable. However, it is interesting to observe that these surfaces exhibit good protein-resistant property. For the surface with a PNIPAAm thickness of 13.4 nm, the HSA adsorption level measured at room temperature was approximately 7 ng/cm2, corresponding to a reduction of 97% compared to the unmodified silicon surface. For thicker PNIPAAm-grafted surface with thickness of 38.1 nm, the adsorption results of three proteins (HSA, fibrinogen, and lysozyme) with different sizes and charges indicate that the PNIPAAm-modified surface exhibits a size-sensitive property of protein adsorption.
Multilayered graphene membrane as an experimental platform to probe nano-confined electrosorption
Publisher: Elsevier BV
Date: 12-2012
Low-voltage electrostatic modulation of ion diffusion through layered graphene-based nanoporous membranes
Publisher: Springer Science and Business Media LLC
Date: 02-07-2018
DOI: 10.1038/S41565-018-0181-4
Abstract: Ion transport in nanoconfinement differs from that in bulk and has been extensively researched across scientific and engineering disciplines
An equivalent 1D nanochannel model to describe ion transport in multilayered graphene membranes
Publisher: Elsevier BV
Date: 04-2018
Highly porous nanofiber-supported monolayer graphene membranes for ultrafast organic solvent nanofiltration
Publisher: American Association for the Advancement of Science (AAAS)
Date: 10-09-2021
Abstract: Via molecular design, versatile electrospun nanofibers enable nanoporous graphene for ultrafast organic solvent nanofiltration.
Mechanically Robust, Electrically Conductive and Stimuli-Responsive Binary Network Hydrogels Enabled by Superelastic Graphene Aerogels
Publisher: Wiley
Date: 14-03-2014
Abstract: The architecture of the nanofiller phase in polymer nanocomposites matters! Polymer hydrogels that can combine stimuli-responsiveness with excellent electrically conductivity and mechanical strength can be fabricated by incorporation of the polymer into an ultralight and superelastic graphene aerogel to form a binary network.
Graphene Hydrogel as a Porous Scaffold for Cartilage Regeneration
Publisher: American Chemical Society (ACS)
Date: 29-11-2022
Abstract: Porous scaffolds have widely been exploited in cartilage tissue regeneration. However, it is often difficult to understand how the delicate hierarchical structure of the scaffold material affects the regeneration process. Graphene materials are versatile building blocks for robust and biocompatible porous structures, enabling investigation of structural cues on tissue regeneration otherwise challenging to ascertain. Here, we utilize a graphene hydrogel with stable and tunable structure as a model scaffold to examine the effect of porous structure on matrix remodeling associated with ingrowth of chondrocytes on scaffolds. We observe much-accelerated yet balanced cartilage remodeling correlating the ingrowth of chondrocytes into the graphene scaffold with an open pore structure on the surface. Importantly, such an enhanced remodeling selectively promotes the expression of collagen type II fibrils over proteoglycan aggrecan, hence clearly illustrating that chondrocytes maintain a stable phenotype when they migrate into the scaffold while offering new insights into scaffold design for cartilage repair.
Ion-Transport Experiments to Probe the Nanostructure of Graphene/Polymer Membranes
Publisher: Wiley
Date: 25-07-2018
Bio-Inspired Two-Dimensional Nanofluidic Generators Based on a Layered Graphene Hydrogel Membrane
Publisher: Wiley
Date: 31-07-2013
Abstract: An electrogenetic layered graphene hydrogel membrane (GHM) possesses ultra-large interlayer spacing of about 10 nm, forming charged 2D nanocapillaries between graphene sheets that selectively permeate counter-ions and exclude co-ions. When an electrolyte flow goes through the GHM, it functions as an integrated 2D nanofluidic generator converting hydraulic motion into electricity. The maximum streaming conductance density approaches 16.8 μA cm(-2) bar(-1) .
Dynamic Electrosorption Analysis as an Effective Means to Characterise the Structure of Bulk Graphene Assemblies
Publisher: Wiley
Date: 10-01-2013
Abstract: Restacking of graphene sheets to a graphite-like structure is a prevailing problem that is known to compromise the performance of in idual graphene sheets in an assembled bulk form. To address this common problem efficiently and monitor the structure and quality of graphene products comprehensively, it is highly desirable to develop reliable metrology techniques for characterising graphene-based materials on a bulk assembly level and in a quantitative manner. Here, by revisiting the physicochemical principle of electrosorption, we propose a simple electrochemical approach, namely dynamic electrosorption analysis (DEA), as an easily accessible and effective technique for evaluation of the self-stacking behaviour of graphene. Taking multilayered chemically converted graphene films as a model, we demonstrate that the DEA technique can effectively reveal very subtle variation in accessible surface area and pore size of graphene assemblies in the liquid phase and thus can provide useful insights to the experimental design relating to restacking control. This work also reveals the huge effect some routine processing conditions, such as heat treatment and drying, can have on the structure and performance of graphene-based bulk materials, providing useful guidance for future manufacturing of this class of materials.
Metal‐organic framework (MOF) thickness control for carbon dioxide electroreduction to formate
Publisher: Wiley
Date: 08-06-2023
DOI: 10.1002/CNL2.66
Abstract: Decreasing particle size (like thickness) is a common strategy to enhance the activities of catalysts. In this work, we have synthesized two coppers, which are bismuth‐based metal‐organic framework (CuBi‐MOF) catalysts with different thicknesses (134.8 and 2.0 nm). In contrast to common expectations, large thickness CuBi‐MOF has exhibited superior activities as a comparison to its small‐thickness counterpart in terms of carbon dioxide electroreduction to produce formate, characteristic of high selectivity (Faraday efficiency 90%), a wide window of potential (−0.6 to −1.6 V vs. reversible hydrogen electrode), and large current densities (up to −380 mA cm −2 ). The mechanism study has been performed by using density functional theory calculations, which highlight the strong synergic effect between Cu and Bi sites in large‐thickness CuBi‐MOF for activating CO 2 molecules. Consequently, large‐thickness CuBi‐MOF could show smaller Gibbs free energies compared to its small counterpart for binding with reaction intermediate (*COOH, 1.1 vs. 1.8 eV). The result of this work could provide new insights into catalyst design toward a number of electrochemical systems.
Structural and chemical interplay between nano-active and encapsulation materials in a core–shell SnO2@MXene lithium ion anode system
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0CE01468K
Abstract: Structural and chemical interplay between nano-active and encapsulation materials in a core–shell SnO 2 @MXene lithium ion anode system was investigated in detail.
Back Cover Image: Carbon Neutralization, Volume 2, Issue 4, July 2023
Publisher: Wiley
Date: 07-2023
DOI: 10.1002/CNL2.84
A Porous and Interconnected Polypyrrole Film with High Conductivity and Ion Accessibility as Electrode for Flexible All‐Solid‐State Supercapacitors
Publisher: Wiley
Date: 31-10-2019
Bioinspired inhibition of aggregation in metal-organic frameworks (MOFs)
Publisher: Elsevier BV
Date: 03-2023
Multilayered Graphene Hydrogel Membranes for Guided Bone Regeneration
Publisher: Wiley
Date: 31-03-2016
Abstract: A multilayered graphene hydrogel (MGH) membrane is used as an excellent barrier membrane for guided bone regeneration. The unique multilayered nanostructure of the MGH membrane results in improved material properties, which benefits protein adsorption, cell adhesion, and apatite deposition, and allows higher quality and fast bone regeneration.
Liquid-Mediated Dense Integration of Graphene Materials for Compact Capacitive Energy Storage
Publisher: American Association for the Advancement of Science (AAAS)
Date: 02-08-2013
Abstract: Electrochemical capacitors (ECs) can rapidly charge and discharge, but generally store less energy per unit volume than batteries. One approach for improving on the EC electrodes made from porous carbon materials is to use materials such as chemically converted graphene (CCG, or reduced graphene oxide), in which intrinsic corrugation of the sheets should maintain high surface areas. In many cases, however, these materials do not pack into compact electrodes, and any ECs containing them have low energy densities. Yang et al. (p. 534 ) now show that capillary compression of gels of CCG containing both a volatile and nonvolatile electrolyte produced electrodes with a high packing density. The intersheet spacing creates a continuous ion network and leads to high energy densities in prototype ECs.
An abnormal size effect enables ampere-level O2 electroreduction to hydrogen peroxide in neutral electrolytes
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EE00509G
Abstract: An abnormal size effect was used to drive two-electron oxygen electroreduction, where large-size ZnO outperform its small-size counterpart, demonstrating ∼100% selectivity to H 2 O 2 up to ere-level current densities in neutral electrolytes.
Ion transport in complex layered graphene-based membranes with tuneable interlayer spacing
Publisher: American Association for the Advancement of Science (AAAS)
Date: 05-02-2016
Abstract: A combination of experiments and simulations unveils unusual nanoconfined ion transport in layered graphene membranes.
Molecular size-dependent subcontinuum solvent permeation and ultrafast nanofiltration across nanoporous graphene membranes
Publisher: Springer Science and Business Media LLC
Date: 08-07-2021
Ordered Gelation of Chemically Converted Graphene for Next‐Generation Electroconductive Hydrogel Films
Publisher: Wiley
Date: 28-06-2011
Related Organisations
Massachusetts Institute Of Technology
Location: United States of America
Related Funding Activities
Atomically Thin Membranes To Transform Chemical Separations
Start Date: 2022
End Date: 2026
Funder: Australian Research Council
View Funded ActivityARC Future Fellowships - Grant ID: FT210100364
Start Date: 05-2022
End Date: 05-2026
Amount: $795,000.00
Funder: Australian Research Council
View Funded Activity