Dr Jinghua Fang received her Masters of Science from the Yunnan University, China. She joined the teaching and research faculty at the Modern Analysis and Testing Centre, Yunnan University after completing her Masters. Her main focus was on the atomic force microscopy investigation of nanodiamond fabrication and applications. She was trained in Atomic Force Microscopy (AFM) at the Chinese Academy of Sciences Institute and also received training in Japan. Jinghua secured a prestigious International Postgraduate Research Scholarship (IPRS) in 2007 and completed her PhD project “Fabrication, characterization, and applications of anodic aluminium oxide” at the University of Melbourne. With more than 10 years experience in materials characterization, Jinghua has developed expertise in materials science and in transmission electron microscopy(TEM), Atomic Force Microscopy (AFM), High-Resolution Field-Emission Scanning Electron Microscopy (FESEM), and Focused Ion Beam (FIB) techniques.
Her newly developed techniques enabled her to win seed funding from the Melbourne Materials Institute in 2011. At the end of 2011, she joined the Plasma Nanoscience Centre Australia (PNCA) group at the Commonwealth Scientific Industrial Research Organization (CSIRO) after winning an Office of the Chief Executive (OCE) Postdoctoral Fellowship. At the CSIRO, Jinghua worked on one-dimensional nanostructure synthesis and applications using low-temperature plasmas. Her investigations have demonstrated that the nanoporous anodic aluminium oxide membranes are one of the best modern platforms for designing the new-generation nanoplasmonic metamaterials.
At the end of 2015, Jinghua joined the School of Mathematical and Physical Sciences, at the Faculty of Science, University of Technology Sydney as a Postdoctoral Research Fellow. In 2016, she won an Australian Research Council (ARC) Discovery Early Career Researcher Award.
Her major interests are materials science and engineering, mainly focused on plasmonics, template-assisted nanostructure fabrication, characterization and applications.
Can supervise: YES
Material science and engineering, mainly focused on plasmonics, template-assisted nanostructure fabrication, characterization and applications.
- Chemistry and Materials
- Introduction to Materials
- Scanned probe and electron microscopy
Singhal, N, Levchenko, I, Huang, S, Xu, L, Potrivitu, GC, Cherkun, O, Fang, J, Bazaka, K & Xu, S 2019, '3D-Printed Multilayered Reinforced Material System for Gas Supply in CubeSats and Small Satellites', Advanced Engineering Materials, vol. 21, no. 11.View/Download from: Publisher's site
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Further development of the near-Earth satellite infrastructure as well as plans for colonization of the Moon and Mars require innovative materials and technologies to produce efficient space assets capable of active functioning for several years. Therefore, the development of compact and efficient devices has bloomed exponentially. Critical components of such devices, propulsion systems that include thrusters, and feed and power systems, have to be efficient and compact. Moreover, these systems shall be simple and cheap, to satisfy the need for thousands of small satellites planned to be launched in the near future. Herein, the design of a 3D-printed, reinforced multilayered material system for gas supply to be used in CubeSats and small satellites of a 1U (10 × 10 × 11.3 cm) form factor is described. The main objective of the system is to provide 0.1 standard cubic centimeter per minute (sccm) of propellant to the thruster. To achieve that, a material system is designed for a propellant tank of ≈50 × 100 mm.
Hong, J, Yick, S, Chow, E, Murdock, A, Fang, J, Seo, DH, Wolff, A, Han, Z, Van Der Laan, T, Bendavid, A, Ostrikov, K & Murphy, AB 2019, 'Direct plasma printing of nano-gold from an inorganic precursor', Journal of Materials Chemistry C, vol. 7, no. 21, pp. 6369-6374.View/Download from: Publisher's site
© 2019 The Royal Society of Chemistry. Plasma printing and plasma-assisted printing of functional nanomaterials are being developed as important alternative fabrication techniques. Nano-gold is used in many applications including organic photovoltaics, flexible electronics, nanomedicine, catalysis and sensing, taking advantage of its unique optical, electrical and physical properties, which depend on particle shape, size and distribution. A direct one-step nano-gold printing process using an HAuCl4 solution precursor injected into an atmospheric-pressure plasma jet is demonstrated. Atomized droplets of the solution are reduced to gold nanoparticles in the plasma and deposited on the substrate. The gold film has minimal Cl content, and its structure can be controlled by the deposition time, from nanometer-size particles to a dense film that fully covers the substrate. Printing is demonstrated on substrates including silicon, alumina filter membrane, vertical graphene, and paper. The applicability of the nano-gold film as a SERS (surface-enhanced Raman scattering) platform is demonstrated by sensing of a 0.25 and 0.7 amol μm-2 of Rhodamine B on an Si and paper substrate respectively, a level undetectable in the absence of nano-gold.
Previdi, R, Levchenko, I, Arnold, M, Gali, M, Bazaka, K, Xu, S, Ostrikov, K, Bray, K, Jin, D & Fang, J 2019, 'Plasmonic platform based on nanoporous alumina membranes: order control via self-assembly', Journal of Materials Chemistry A, vol. 7, no. 16, pp. 9565-9577.View/Download from: Publisher's site
© The Royal Society of Chemistry. A novel approach to significantly enhance and comprehensively assess the level of nanochannel ordering in self-assembled nanoporous membranes is proposed and tested. An advanced technique based on a two-step anodization and two-step chemical treatment was used to prepare the perfect through membranes by opening channels from the bottom via electrochemical enlargement, and chemical removal of a residual metal and barrier alumina layer. The influence of the process parameters on the self-assembled ordering was studied, and various methods of order assessment were proposed and tested, such as distributions of equivalent disc radii, 2D Fourier transformations, autocorrelation, Hough transformations, Minkowski connectivity, and distributions of nanochannel centre positions. We have demonstrated that self-assembled ordering in nanoscaled membranes could be efficiently tuned by the process parameters, and different assessment methods should be used to comprehensively characterize the order of nanochannels in the nanoporous membranes. To demonstrate the potential of this technique, we show simulations of the narrowing of plasmon spectra in these materials. The proposed fabrication and assessment methods could be used to drastically enhance the properties of nanoporous membranes for nanoelectronics, filters, sensors, bio-active devices and other advanced emerging applications. Finally, our approach could be used for enhancing and tailoring other self-assembled systems and devices of considerable complexity.
Levchenko, I, Bazaka, K, Keidar, M, Xu, S & Fang, J 2018, 'Hierarchical Multicomponent Inorganic Metamaterials: Intrinsically Driven Self-Assembly at the Nanoscale', Advanced Materials, vol. 30, no. 2, pp. 1-32.View/Download from: Publisher's site
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Increasingly intricate in their composition and structural organization, hierarchical multicomponent metamaterials with nonlinear spatially reconfigurable functionalities challenge the intrinsic constraints of natural materials, revealing tremendous potential for the advancement of biochemistry, nanophotonics, and medicine. Recent breakthroughs in high-resolution nanofabrication utilizing ultranarrow, precisely controlled ion or laser beams have enabled assembly of architectures of unprecedented structural and functional complexity, yet costly, time- and energy-consuming high-resolution sequential techniques do not operate effectively at industry-required scale. Inspired by the fictional Baron Munchausen's fruitless attempt to pull himself up, it is demonstrated that metamaterials can undergo intrinsically driven self-assembly, metaphorically pulling themselves up into existence. These internal drivers hold a key to unlocking the potential of metamaterials and mapping a new direction for the large-area, cost-efficient self-organized fabrication of practical devices. A systematic exploration of these efforts is presently missing, and the driving forces governing the intrinsically driven self-assembly are yet to be fully understood. Here, recent progress in the self-organized formation and self-propelled growth of complex hierarchical multicomponent metamaterials is reviewed, with emphasis on key principles, salient features, and potential limitations of this family of approaches. Special stress is placed on self-assembly driven by plasma, current in liquid, ultrasonic, and similar highly energetic effects, which enable self-directed formation of metamaterials with unique properties and structures.
Seo, DH, Batmunkh, M, Fang, J, Murdock, AT, Yick, S, Han, Z, Shearer, CJ, Macdonald, TJ, Lawn, M, Bendavid, A, Shapter, JG & Ken Ostrikov, K 2018, 'Ambient air synthesis of multi-layer CVD graphene films for low-cost, efficient counter electrode material in dye-sensitized solar cells', FlatChem, vol. 8, pp. 1-8.View/Download from: Publisher's site
© 2018 Elsevier B.V. Graphene holds great promise as a substitute counter electrode (CE) material to replace the conventional Pt in dye-sensitized solar cells (DSSCs). However, lengthy chemical processing with hazardous chemicals, high production cost and the poor quality of the graphene flakes produced impedes their utilization as a CE material in DSSCs. Herein, we demonstrate a low-cost synthesis of multi-layer graphene films using a thermal chemical vapour deposition (CVD) process in an ambient-air environment without expensive compressed gases while using a renewable source namely soybean oil. Utilization of our low-cost graphene film in DSSCs exhibits excellent electrocatalytic activity and high electrical conductivity, and thus delivers superior photovoltaic (PV) efficiency compared to the devices fabricated with graphene films produced from commonly adopted chemical methods. Even though no additional treatments such as heteroatom doping are applied, our low-cost graphene showed great promise in DSSCs. Further enhancement in the efficiency of our multi-layer graphene film based DSSCs is readily achievable by applying simple functional treatments (for example SOCl2). Finally, material cost analysis of our multi-layer graphene film compared to commercial Pt electrode suggests that we can reduce the CE material cost by five fold, making our CVD graphene film a realistic option for application in commercial DSSC systems.
Baranov, O, Fang, J, Ostrikov, K & Cvelbar, U 2017, 'TiN deposition and morphology control by scalable plasma-assisted surface treatments', Materials Chemistry and Physics, vol. 188, pp. 143-153.View/Download from: Publisher's site
© 2016 Elsevier B.V. A method to modify the mechanical properties and morphology of thin TiN films by controlling the ion fluxes via purposefully shaped magnetic field is developed to enhance the effectiveness of plasma-enhanced deposition of TiN on a large (up to 400 mm in diameter) substrate. For this purpose, the two main schemes of the plasma control are examined. When the substrate is a part of the plasma-generating circuit, TiN is deposited in the magnetron-like arc configuration of the magnetic field. This configuration is used to control ion fluxes for cleaning, etching, and heating of the substrate, and eventually, to control the mechanical properties and morphology of the deposits. When exposing the substrate to the plasma of an external plasma source, the magnetic traps of the bottle configuration with mirrors near the plasma source and substrate surface are created. It is shown that the ion fluxes from the external plasma source can be controlled by the location and powering of the control magnetic coils, which direct nitrogen and Ti ions to the surface. The proposed method is generic and could be used for controlling various nitride materials including but not limited to BN, NbN, W 2 N and TaN.
Seo, DH, Pineda, S, Fang, J, Gozukara, Y, Yick, S, Bendavid, A, Lam, SKH, Murdock, AT, Murphy, AB, Han, ZJ & Ostrikov, KK 2017, 'Single-step ambient-air synthesis of graphene from renewable precursors as electrochemical genosensor.', Nature Communications, vol. 8, pp. 1-9.View/Download from: Publisher's site
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 and extensive vacuum processing are necessary for creating a highly controlled environment, isolated from ambient air, to enable the growth of graphene films. Here we exploit the ambient-air environment to enable the growth of graphene films, without the need for compressed gases. A renewable natural precursor, soybean oil, is transformed into continuous graphene films, composed of single-to-few layers, in a single step. The enabling parameters for controlled synthesis and tailored properties of the graphene film are discussed, and a mechanism for the ambient-air growth is proposed. Furthermore, the functionality of the graphene is demonstrated through direct utilization as an electrode to realize an effective electrochemical genosensor. Our method is applicable to other types of renewable precursors and may open a new avenue for low-cost synthesis of graphene films.
Levchenko, I, Keidar, M, Cvelbar, U, Mariotti, D, Mai-Prochnow, A, Fang, J & Ostrikov, K 2016, 'Novel biomaterials: Plasma-enabled nanostructures and functions', Journal of Physics D: Applied Physics, vol. 49, no. 27, pp. 1-16.View/Download from: Publisher's site
© 2016 IOP Publishing Ltd.Material processing techniques utilizing low-temperature plasmas as the main process tool feature many unique capabilities for the fabrication of various nanostructured materials. As compared with the neutral-gas based techniques and methods, the plasma-based approaches offer higher levels of energy and flux controllability, often leading to higher quality of the fabricated nanomaterials and sometimes to the synthesis of the hierarchical materials with interesting properties. Among others, nanoscale biomaterials attract significant attention due to their special properties towards the biological materials (proteins, enzymes), living cells and tissues. This review briefly examines various approaches based on the use of low-temperature plasma environments to fabricate nanoscale biomaterials exhibiting high biological activity, biological inertness for drug delivery system, and other features of the biomaterials make them highly attractive. In particular, we briefly discuss the plasma-assisted fabrication of gold and silicon nanoparticles for bio-applications; carbon nanoparticles for bioimaging and cancer therapy; carbon nanotube-based platforms for enzyme production and bacteria growth control, and other applications of low-temperature plasmas in the production of biologically-active materials.
Scott, JA, Totonjian, D, Martin, AA, Toan, TT, Fang, J, Toth, M, McDonagh, AM, Aharonovich, I & Lobo, CJ 2016, 'Versatile method for template-free synthesis of single crystalline metal and metal alloy nanowires', NANOSCALE, vol. 8, no. 5, pp. 2804-2810.View/Download from: Publisher's site
Ma, C, Xu, X, Wang, F, Zhou, Z, Wen, S, Liu, D, Fang, J, Lang, CI & Jin, D 2016, 'Probing the Interior Crystal Quality in the Development of More Efficient and Smaller Upconversion Nanoparticles', Journal of Physical Chemistry Letters, vol. 7, pp. 3252-3258.View/Download from: Publisher's site
Optical biomedical imaging using luminescent nanoparticles as contrast agents prefers small size, as they can be used at high dosages and efficiently cleared from body. Reducing nanoparticle size is critical for the stability and specificity for the fluorescence nanoparticles probes for in vitro diagnostics and subcellular imaging. The development of smaller and brighter upconversion nanoparticles (UCNPs) is accordingly a goal for complex imaging in bioenvironments. At present, however, small UCNPs are reported to exhibit less emission intensity due to increased surface deactivation and decreased number of dopants. Here we show that smaller and more efficient UCNPs can be made by improving the interior crystal quality via controlling heating rate during synthesis. We further developed a unique quantitative method for optical characterizations on the single UCNPs with varied sizes and the corresponding shell passivated UCNPs, confirming that the internal crystal quality dominates the relative emission efficiency of the UCNPs.
Fang, J, Levchenko, I & Ostrikov, KK 2015, 'Atmospheric Plasma Jet-Enhanced Anodization and Nanoparticle Synthesis', IEEE TRANSACTIONS ON PLASMA SCIENCE, vol. 43, no. 3, pp. 765-769.View/Download from: Publisher's site
Fang, J, Levchenko, I, Lu, X, Mariotti, D & Ostrikov, KK 2015, 'Hierarchical bi-dimensional alumina/palladium nanowire nano-architectures for hydrogen detection, storage and controlled release', INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol. 40, no. 18, pp. 6165-6172.View/Download from: Publisher's site
Fang, J, Levchenko, I, Mai-Prochnow, A, Keidar, M, Cvelbar, U, Filipic, G, Han, ZJ & Ostrikov, KK 2015, 'Protein retention on plasma-treated hierarchical nanoscale gold-silver platform', SCIENTIFIC REPORTS, vol. 5.View/Download from: Publisher's site
Levchenko, I, Keidar, M, Mai-Prochnow, A, Modic, M, Cvelbar, U, Fang, J & Ostrikov, KK 2015, 'Plasma treatment for next-generation nanobiointerfaces', BIOINTERPHASES, vol. 10, no. 2.View/Download from: Publisher's site
Levchenko, I, Mai-Prochnow, A, Yick, S, Bilek, MMM, Kondyurin, A, Han, Z-J, Fang, J, Cvelbar, U, Mariotti, D & Ostrikov, K 2015, 'Hybrid Carbon-Based Nanostructured Platforms for the Advanced Bioreactors', JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, vol. 15, no. 12, pp. 10074-10090.View/Download from: Publisher's site
Yick, S, Mai-Prochnow, A, Levchenko, I, Fang, J, Bull, MK, Bradbury, M, Murphy, AB & Ostrikov, KK 2015, 'The effects of plasma treatment on bacterial biofilm formation on vertically-aligned carbon nanotube arrays', RSC ADVANCES, vol. 5, no. 7, pp. 5142-5148.View/Download from: Publisher's site
Fang, J, Levchenko, I, Yan, W, Aharonovich, I, Aramesh, M, Prawer, S & Ostrikov, KK 2015, 'Plasmonic Metamaterial Sensor with Ultra-High Sensitivity in the Visible Spectral Range', Advanced Optical Materials, vol. 3, no. 6, pp. 750-755.View/Download from: Publisher's site
A metamaterial-based plasmonic sensor composed of thin metal and polymer layers deposited on top of a highly ordered porous alumina exhibits a sensitivity of more than 4800 nm per refractive index unit in the visible spectral range. The device is robust, cheap, has a large functional area of about 2 cm2, and the overall transmission is tunable by varying the film thickness.
Tran, TT, Fang, J, Zhang, H, Rath, P, Bray, K, Sandstrom, RG, Shimoni, O, Toth, M & Aharonovich, I 2015, 'Facile Self-Assembly of Quantum Plasmonic Circuit Components', ADVANCED MATERIALS, vol. 27, no. 27, pp. 4048-4053.View/Download from: Publisher's site
Aramesh, M, Cervenka, J, Roberts, A, Djalalian-Assl, A, Rajasekharan, R, Fang, J, Ostrikov, K & Prawer, S 2014, 'Coupling of a single-photon emitter in nanodiamond to surface plasmons of a nanochannel-enclosed silver nanowire', Optics Express, vol. 22, no. 13, pp. 15530-15541.View/Download from: Publisher's site
A finite element method is applied to study the coupling between a nitrogen vacancy (NV) single photon emitter in nanodiamond and surface plasmons in a silver nanowire embedded in an alumina nanochannel template. We investigate the effective parameters in the coupled system and present detailed optimization for the maximum transmitted power at a selected optical frequency (650 nm). The studied parameters include nanowire length, nanowire diameter, distance between the dipole and the nanowire, orientation of the emitter and refractive index of the surrounding. It is found that the diameter of the nanowire has a strong influence on the propagation of the surface plasmon polaritons and emission power from the bottom and top endings of the nanowire. © 2014 Optical Society of America.
Aramesh, M, Fox, K, Lau, DWM, Fang, J, Ostrikov, K, Prawer, S & Cervenka, J 2014, 'Multifunctional three-dimensional nanodiamond-nanoporous alumina nanoarchitectures', Carbon, vol. 75, pp. 452-464.View/Download from: Publisher's site
Hybrid composite nanomaterials provide an attractive and versatile material platform for numerous emerging nano- and biomedical applications by offering the possibility to combine diverse properties which are impossible to obtain within a single material. In this work, we present the fabrication of novel hybrid diamond and amorphous diamond-like carbon (DLC) coated nanoporous alumina materials that exhibit multiple functionalities, such as high surface area, quasi-ordered nanopore structure, tunable surface chemistry and electrical conductivity, excellent biological, chemical and corrosion resistance. These multifunctional nanohybrid materials are fabricated using the plasma-induced carbonization method that effectively modifies the surface and the inside of the nanopores of anodic alumina, producing a homogenous ultrathin DLC protecting layer over the whole external and internal surfaces of the membranes. We demonstrate that the interplay between internal and external carbon supply is a critical factor for the formation of the ultrathin sp 3 -bonded carbon layer in the nanopores. This study brings new insights in the DLC growth mechanisms in confined nanospaces and opens new avenues to fabricate hybrid, chemically resistant and biocompatible carbon-coated nanoarchitectures on other inorganic supports. © 2014 Elsevier Ltd. All rights reserved.
Baranov, O, Fang, J, Keidar, M, Lu, X, Cvelbar, U & Ostrikov, KK 2014, 'Effective control of the arc discharge-generated plasma jet by smartly designed magnetic fields', IEEE Transactions on Plasma Science, vol. 42, no. 10, pp. 2464-2465.View/Download from: Publisher's site
© 2014 IEEE. Control of ion current directed to a substrate is a key feature of plasma processing reactors. Magnetic field has been used to enhance the plasma setups. Two magnetic coils placed under the substrate together with the coils near the plasma source, generate magnetic traps for the plasma electrons in a vacuum chamber, to confine them and generate electric field to influence the ion motion. Images of the plasma jet patterns for different configurations of the magnetic field are presented.
Baranov, O, Zhong, X, Fang, J, Kumar, S, Xu, S, Cvelbar, U, Mariotti, D & Ostrikov, K 2014, 'Dense plasmas in magnetic traps: Generation of focused ion beams with controlled ion-to-neutral flux ratios', IEEE Transactions on Plasma Science, vol. 42, no. 10, pp. 2518-2519.View/Download from: Publisher's site
© 2014 IEEE. Customized magnetic traps were developed to produce a domain of dense plasmas with a narrow ion beam directed to a particular area of the processed substrate. A planar magnetron coupled with an arc discharge source created the magnetic traps to confine the plasma electrons and generate the ion beam with the controlled ratio of ion-to-neutral fluxes. Images of the plasma jet patterns and numerical vizualizations help explaining the observed phenomena.
Fang, J, Levchenko, I & Ostrikov, KK 2014, 'Free-standing alumina nanobottles and nanotubes pre-integrated into nanoporous alumina membranes.', Science and Technology of Advanced Materials, vol. 15, no. 4, pp. 1-8.View/Download from: Publisher's site
A novel interfacial structure consisting of long (up to 5 μm), thin (about 300 nm), highly-ordered, free-standing, highly-reproducible aluminum oxide nanobottles and long tubular nanocapsules attached to a rigid, thin (less than 1 μm) nanoporous anodic alumina membrane is fabricated by simple, fast, catalyst-free, environmentally friendly voltage-pulse anodization. A growth mechanism is proposed based on the formation of straight channels in alumina membrane by anodization, followed by neck formation due to a sophisticated voltage control during the process. This process can be used for the fabrication of alumina nanocontainers with highly controllable geometrical size and volume, vitally important for various applications such as material and energy storage, targeted drug and diagnostic agent delivery, controlled drug and active agent release, gene and biomolecule reservoirs, micro-biologically protected platforms, nano-bioreactors, tissue engineering and hydrogen storage.
Fang, J, Levchenko, I, Han, ZJ, Yick, S & Ostrikov, KK 2014, 'Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore filling.', Nanoscale Research Letters, vol. 9, no. 1, pp. 1-8.View/Download from: Publisher's site
Control over nucleation and growth of multi-walled carbon nanotubes in the nanochannels of porous alumina membranes by several combinations of posttreatments, namely exposing the membrane top surface to atmospheric plasma jet and application of standard S1813 photoresist as an additional carbon precursor, is demonstrated. The nanotubes grown after plasma treatment nucleated inside the channels and did not form fibrous mats on the surface. Thus, the nanotube growth mode can be controlled by surface treatment and application of additional precursor, and complex nanotube-based structures can be produced for various applications. A plausible mechanism of nanotube nucleation and growth in the channels is proposed, based on the estimated depth of ion flux penetration into the channels.63.22.Np Layered systems; 68. Surfaces and interfaces; Thin films and nanosystems (structure and non-electronic properties); 81.07.-b Nanoscale materials and structures: fabrication and characterization.
Fang, J, Levchenko, I, Van Der Laan, T, Kumar, S & Ostrikov, K 2014, 'Multipurpose nanoporous alumina-carbon nanowall bi-dimensional nano-hybrid platform via catalyzed and catalyst-free plasma CVD', Carbon, vol. 78, pp. 627-632.View/Download from: Publisher's site
Simple, rapid, plasma-assisted synthesis of large-area arrays of vertically-aligned carbon nanowalls on highly-porous, transparent bare and gold-coated alumina membranes with the two pore sizes is reported. It is demonstrated that the complex patterns of vertically aligned nanowalls can nucleate and form different morphologies in the low-temperature plasmas. The process is stable, and the twofold change in the gas flow (10 and 20 sccm) does not noticeably influence the morphology of the nanowall pattern. Application of a thin (5 nm) gold layer to nanoporous membrane prior to the nanowall growth allows controlling the network morphology. © 2014 Published by Elsevier Ltd. All rights reserved.
Fang, J, Levchenko, I, Kumar, S, Seo, D & Ostrikov, KK 2014, 'Vertically-aligned graphene flakes on nanoporous templates: morphology, thickness, and defect level control by pre-treatment.', Science and Technology of Advanced Materials, vol. 15, no. 5, pp. 1-8.View/Download from: Publisher's site
Various morphologies of the vertically-aligned graphene flakes were fabricated on the nanoporous templates treated with metal ions in solutions, as well as coated with a thin gold layer and activated in the low-temperature Ar plasma. The thickness and level of structural defects in the graphene flakes could be effectively controlled by a proper selection of the pre-treatment method. We have also demonstrated that various combinations of the flake thickness and defect levels can be obtained, and the morphology and density of the graphene pattern can be effectively controlled. The result obtained could be of interest for various applications requiring fabrication of large graphene networks with controllable properties.
Seo, DH, Yick, S, Han, ZJ, Fang, JH & Ostrikov, KK 2014, 'Synergistic fusion of vertical graphene nanosheets and carbon nanotubes for high-performance supercapacitor electrodes.', ChemSusChem, vol. 7, no. 8, pp. 2317-2324.View/Download from: Publisher's site
Graphene and carbon nanotubes (CNTs) are attractive electrode materials for supercapacitors. However, challenges such as the substrate-limited growth of CNTs, nanotube bundling in liquid electrolytes, under-utilized basal planes, and stacking of graphene sheets have so far impeded their widespread application. Here we present a hybrid structure formed by the direct growth of CNTs onto vertical graphene nanosheets (VGNS). VGNS are fabricated by a green plasma-assisted method to break down and reconstruct a natural precursor into an ordered graphitic structure. The synergistic combination of CNTs and VGNS overcomes the challenges intrinsic to both materials. The resulting VGNS/CNTs hybrids show a high specific capacitance with good cycling stability. The charge storage is based mainly on the non-Faradaic mechanism. In addition, a series of optimization experiments were conducted to reveal the critical factors that are required to achieve the demonstrated high supercapacitor performance.
Baranov, OO, Fang, J, Rider, AE, Kumar, S & Ostrikov, K 2013, 'Effect of Ion Current Density on the Properties of Vacuum Arc-Deposited TiN Coatings', IEEE TRANSACTIONS ON PLASMA SCIENCE, vol. 41, no. 12, pp. 3640-3644.View/Download from: Publisher's site
Fang, J, Levchenko, I, Ostrikov, KK & Prawer, S 2013, 'Sonochemical nanoplungers: crystalline gold nanowires by cavitational extrusion through nanoporous alumina', JOURNAL OF MATERIALS CHEMISTRY C, vol. 1, no. 9, pp. 1727-1731.View/Download from: Publisher's site
Kondyurin, A, Levchenko, I, Han, Z-J, Yick, S, Mai-Prochnow, A, Fang, J, Ostrikov, K & Bilek, MMM 2013, 'Hybrid graphite film-carbon nanotube platform for enzyme immobilization and protection', CARBON, vol. 65, pp. 287-295.View/Download from: Publisher's site
Randeniya, LK, Shi, H, Barnard, AS, Fang, J, Martin, PJ & Ostrikov, KK 2013, 'Harnessing the Influence of Reactive Edges and Defects of Graphene Substrates for Achieving Complete Cycle of Room-Temperature Molecular Sensing', SMALL, vol. 9, no. 23, pp. 3993-3999.View/Download from: Publisher's site
Baranov, O, Romanov, M, Fang, J, Cvelbar, U & Ostrikov, KK 2012, 'Control of ion density distribution by magnetic traps for plasma electrons', JOURNAL OF APPLIED PHYSICS, vol. 112, no. 7.View/Download from: Publisher's site
Fang, J, Aharonovich, I, Leychenko, I, Ostrikov, K, Spizzirri, PG, Rubanov, S & Prawer, S 2012, 'Plasma-enabled growth of single-crystalline SiC/AlSiC core-shell nanowires on porous alumina templates', Crystal Growth and Design, vol. 12, no. 6, pp. 2917-2922.View/Download from: Publisher's site
We report the catalyst-free synthesis of the arrays of core-shell, ultrathin, size-uniform SiC/AlSiC nanowires on the top of a periodic anodic aluminum oxide template. The nanowires were grown using an environmentally friendly, silane-free process by exp
Fang, J-H, Spizzirri, P, Lin, L, Roberts, A & Prawer, S 2010, 'Template Controlled Fabrication of Silver Nano-Structures Using Porous Anodic Aluminium Oxide', JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY, vol. 46, no. 1, pp. 46-52.
Fang, J-H, Spizzirri, P, Cimmino, A, Rubanov, S & Prawer, S 2009, 'Extremely high aspect ratio alumina transmission nanomasks: their fabrication and characterization using electron microscopy', NANOTECHNOLOGY, vol. 20, no. 6.View/Download from: Publisher's site
Fang, J, Xiang, J, Hu, Y, Xin, S, Li, M & Wu, X 2004, 'Preparation of nanocrystalline (Ni, Zn)Fe2O4 composite material with coprecipitation and its characteristics', Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica, vol. 21, no. 1, pp. 12-16.
By using FeSO4·7H2O, NiSO4·6H2O and ZnSO4·7H2O as raw materials, with a coprecipitation method, the basic carbonate precursor containing fine crystalline grain is synthesized and nanocrystalline (Ni, Zn)Fe2O4 composite particles followed by sintering for one hour can be obtained. The microstructure was measured by using XRD and TEM. The infrared absorption and gas-sensitization of the samples have been investigated. The results show that the diameter of the nano-particles is about 50 nm at 800°C.
Xin, S, Xiang, J, Fang, J, Yang, L & Wu, X 2004, 'The preparation of hexagonal SrFe12O19 by sol-gel technique', Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, vol. 33, no. SUPPL. 2, pp. 26-28.
Hexagonal SrFe12O19 was successfully made by sol-gel technique. The time of forming wet gel was examined under different temperatures and different pH values respectively. And the result shows that the gel has the good characteristics at 60°C. TG-DTA analysis also shows that the lost weight of sample is large. Ferric oxide crystal was synthesized at 750°C. By X-ray analysis, besides SrFe12O19, there are some other substances such as Fe2O3, Fe3O4 at 850°C. Pure powder of SrFe12O19 is achieved at 950°C. Through TEM analysis, Hexagonal SrFe12O19 is found but a little of stick ones.
Xin, SS, Xiang, JZ, Fang, JH, Yang, LF & Wu, XH 2004, 'The preparation of hexagonal SrFe12O19 by sol-gel technique', RARE METAL MATERIALS AND ENGINEERING, vol. 33, pp. 26-28.
Liu, X, Fang, J, Gao, M & Lin, T 2013, 'Nanocrystal TiO2 as scattering layer for dye-sensitized solar cells', Fiber Society Spring 2013 Technical Conference.
Aramesh, M, Cervenka, J, Rajasekharan, R, Garrett, D, Fang, J, Ostrikov, K & Prawer, S 2012, 'Optical properties of silver nanowires grown electrochemically in nanoporous alumina', 2012 Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD, Conference on Optoelectronic and Microelectronic Materials and Devices, IEEE, Melbourne, Victoria, Australia, pp. 143-144.View/Download from: Publisher's site
We report fabrication and optical properties of electrochemically deposited silver nanowires into nanoporous alumina template. A finite element method is used to study plasmonic coupling of dipole emitters with the silver nanowires. © 2012 IEEE.
Fang, JH, Spizzirri, P, Lin, L, Roberts, A & Prawer, S 2008, 'Template controlled fabrication of silver nano-structures using porous anodic aluminium oxide', Materials Forum, pp. 73-78.
A simple method for fabricating various silver nano-structures using porous anodic aluminium oxide templates is described in this work. Highly ordered, high aspect ratio, silver nano-wire arrays were successfully prepared using wet chemical processing and thermal annealing. In addition to the fabrication of nano-wires, silver nano-particles with dimensions around 5-10 nm have also been prepared using the same process. Preliminary optical transmission measurements of the nano-wire arrays are presented in this work for their consideration as a meta-material. © Institute of Materials Engineering Australasia Ltd.
Spizzirri, PG, Fang, JH, Rubanov, S, Gauja, E & Prawer, S 2008, 'Nano-Raman spectroscopy of silicon surfaces', Materials Forum, pp. 161-166.
Near-field enhanced, nano-Raman spectroscopy has been successfully used to probe the surface chemistry of silicon prepared using standard wafer cleaning and processing techniques. The results demonstrate the utility of this measurement for probing the local surface chemical nano-environment with very high sensitivity. Enhancements were observed for the vibrational (stretching) modes of Si-H, F-Si-H and possibly also B-Si-O consistent with the surface treatments applied. The nano-probes did not enhance the phononic features of the silicon substrate. © Institute of Materials Engineering Australasia Ltd.
The Inside Back Cover shows the synergistic integration of highly porous micropatterns of vertically aligned graphenes and carbon nanotubes and their application for high-performance supercapacitor electrodes. This is achieved by fusing the carbon nanotubes in the basal plane of the vertical graphenes, which was synthesized from natural precursors by using an environmentally benign plasma process. The high electrochemical activity of the edge plane is retained, and the relatively inactive basal planes are filled with highly conducting carbon nanotubes. This combination of interconnected nanostructures substantially enhances the supercapacitor performance, thus making hybrid multidimensional nanoarchitectures promising energy storage devices for the future. More details can be found in the Full Paper by Han et al. on page 2317 (DOI: 10.1002/cssc.201402045).
- CSIRO, Australia
- The University of Melbourne, Australia
- The University of Sydney, Australia
- Queensland University of Technology, Australia
- Nanyang Techological University, Singapore
- Shandong University, China