A5021458810- Graphene research and applications
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- 2D Materials and Applications
- Advanced Photocatalysis Techniques
- Graphene and Nanomaterials Applications
- TiO2 Photocatalysis and Solar Cells
- Diamond and Carbon-based Materials Research
- Membrane Separation Technologies
- Advanced Battery Materials and Technologies
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and devices
- Thermal properties of materials
- Molecular Junctions and Nanostructures
- Boron and Carbon Nanomaterials Research
- Quantum Dots Synthesis And Properties
- Multiferroics and related materials
- Bone Tissue Engineering Materials
- Nanopore and Nanochannel Transport Studies
- Advanced Nanomaterials in Catalysis
- Electrocatalysts for Energy Conversion
- Nanofabrication and Lithography Techniques
CSIRO Manufacturing
2017-2024
Commonwealth Scientific and Industrial Research Organisation
2018-2019
University of Oxford
2012-2017
Battelle
2014
University of Maryland, College Park
1984
The inability of membranes to handle a wide spectrum pollutants is an important unsolved problem for water treatment. Here we demonstrate desalination via membrane distillation process using graphene where permeation enabled by nanochannels multilayer, mismatched, partially overlapping grains. Graphene films derived from renewable oil exhibit significantly superior retention vapour flux and salt rejection rates, antifouling capability under mixture saline containing contaminants such as oils...
We report that the shape, orientation, edge geometry, and thickness of chemical vapor deposition graphene domains can be controlled by crystallographic orientations Cu substrates. Under low-pressure conditions, single-layer align with zigzag edges parallel to a single ⟨101⟩ direction on Cu(111) Cu(101), while bilayer two directions Cu(001). atmospheric pressure hexagonal also preferentially align. This discovery exploited generate high-quality, tailored domain thickness, orientations,...
Solid-state supercapacitors can be fabricated by uniformly coating RuO<sub>2</sub>onto vertical graphene (VG) using a simple, scalable, low-cost and solution-free method. The binder-free RuO<sub>2</sub>/VG hybrid electrodes possess high areal capacitance, low electrical resistance, good frequency response, excellent stability, shedding light on the commercialisation of Ru-based energy storage devices.
Abstract Thermal chemical vapour deposition techniques for graphene fabrication, while promising, are thus far limited by resource-consuming and energy-intensive principles. In particular, purified gases extensive vacuum processing necessary creating a highly controlled environment, isolated from ambient air, to enable the growth of films. Here we exploit ambient-air environment films, without need compressed gases. A renewable natural precursor, soybean oil, is transformed into continuous...
Precise control of graphene properties is an essential step toward the realization future devices. Defects, such as individual nitrogen atoms, can strongly influence electronic structure graphene. Therefore, state-of-the-art characterization techniques, in conjunction with modern modeling tools, are necessary to identify these defects and fully understand synthesized material. We have directly visualized substitutional dopant atoms using scanning transmission electron microscopy conducted...
WO<sub>3</sub>/graphene composite minimizes the polysulfide dissolution problem in lithium–sulfur (Li–S) battery systems while exhibiting an excellent performance.
Abstract Reconfigurable terahertz electronics devices with high tuneability are pivotal for next-generation speed wireless communication and sensing technologies. Significant challenges exist realizing these devices, particularly on the design of smart metastructures that can manipulate electromagnetic radiation at frequencies fabrication effective reconfigurability. Here, we incorporate graphene into a graphene/gold bilayer superimposed metamaterial structure, which enables efficient...
Metal nitrides have potential in energy applications because of their physical and optical properties. Nanoparticle composites titanium nitride (TiN) dioxide (TiO2) were investigated for photocatalytic hydrogen (H2) evolution activity via methanol reformation. Physical mixing the nanoparticulate TiO2 TiN was employed to prevent oxy-nitride formation particle aggregation observed thermal preparations. This convenient combination demonstrated a substantial synergistic effect with enhanced (9.4...
Abstract Large-area synthesis of high-quality graphene by chemical vapour deposition on metallic substrates requires polishing or substrate grain enlargement followed a lengthy growth period. Here we demonstrate novel processing method for facile mm-sized, single-crystal coating polycrystalline platinum foils with silicon-containing film. The film reacts heating, resulting in the formation liquid silicide layer that screens lattice and fills topographic defects. This reduces dependence...
Abstract Ammonia borane (AB) is among the most promising precursors for large-scale synthesis of hexagonal boron nitride (h-BN) by chemical vapour deposition (CVD). Its non-toxic and non-flammable properties make AB particularly attractive industry. decomposition under CVD conditions, however, complex hence has hindered tailored h-BN production its exploitation. To overcome this challenge, we report in-depth studies industrially safe growth conditions. In situ mass spectrometry revealed a...
Titanium nitride is an emerging plasmonic material active in the visible and NIR region. In this work, we provide detailed analysis to correlate their optical properties with morphology surface composition.
A direct one-step nano-gold printing process from a HAuCl<sub>4</sub> solution precursor is demonstrated using an atmospheric-pressure plasma jet.
Membrane characteristics can exacerbate the prevailing challenges associated with membrane fouling in industry. However, combined impact of deliberate modifications and unavoidable effects chemical ageing on behaviour is still not well understood. In this study, three polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes different pore size surface roughness were selected subject to 5000 ppm sodium hypochlorite (NaOCl) at pH 10.5, simulate accelerated conditions. The NaOCl was...
Abstract Li‐ion batteries (LIBs) dominate the energy storage market owing to their versatility and efficient storage. Also, for electric vehicle applications, with better power, safety, cyclability are needed. To address issues related lower power density, lesser cyclability, low capacity retention, cost, etc., several modifications like nanostructuring, 3D 2D architectures, doping, core shell particles, binder free electrodes, modified electrolytes, separators employed. Plasma technologies...
We report a method for transferring graphene, grown by chemical vapor deposition, which produces ultraflat graphene surfaces (root-mean-square roughness of 0.19 nm) free from polymer residues over macroscopic areas (>1 cm2). The critical step in preparing such involves the use an intermediate mica template, itself is atomically smooth. demonstrate compatibility these model with surface force balance, opening up possibility measuring normal and lateral forces, including friction adhesion,...
We doped graphene in situ during synthesis from methane and ammonia on copper a low-pressure chemical vapour deposition system, investigated the effect of temperature concentration growth. Raman X-ray photoelectron spectroscopy was used to investigate quality nitrogen content demonstrated that decreasing increasing flow rate results an increase dopants up ca. 2.1% overall. However, concurrent scanning electron microscopy studies demonstrate both growth 1000 900 °C N/C precursor ratio 1/50...
The effect of Fe and Mn co-doping on the magnetic properties antiferromagnetic (AFM) NiO nanoparticles which offer large potential for different applications have been studied. Rietveld refinement fitting powder x-ray diffractometry (XRD) patterns confirmed phase formation face-centred cubic crystal structure average crystallite size lies in short range 32-38 nm. cavity broadband ferromagnetic resonance (FMR) measurements taken at room temperature demonstrate smaller local inhomogeneity...
WS2 nanotubes with carbon coatings in a core-shell structure (i.e. WS2@C) are synthesized through facile method based on the Lewis acid-activated thioglycosylation chemistry. The obtained WS2@C shows conformal coverage of conductive amorphous surface after thermal treatment, thickness layer being controlled by adjusting molar ratios saccharide to nanotube during synthesis process. When applied lithium-ion batteries, structures show higher reversible capacity 638 mAh g-1 at current density...
Linearly polarized light microscopy (PM) revealed that graphene grown by chemical vapor deposition (CVD) on stepped Cu substrate may appear colored. The coloration is associated with the coupling of 450–600 nm into propagating mode in layer when electric vector (E→) parallel step edges and scattering E→ normal to edges. PM an inexpensive, fast, contamination free method efficiently visualize map structure substrates used for large area CVD growth graphene.