ORCID Profile
0000-0002-7390-169X
Current Organisation
Deakin University
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Materials Engineering Not Elsewhere Classified | Nanotechnology | Nanotechnology | Combustion And Fuel Engineering
Materials performance and processes | Fabricated metal products not elsewhere classified | Other |
Publisher: American Vacuum Society
Date: 24-07-2014
DOI: 10.1116/1.4890982
Abstract: Biological materials are hierarchically organized complex composites, which embrace multiple practical functionalities. As an ex le, the wild silkworm cocoon provides multiple protective functions against environmental and physical hazards, promoting the survival chance of moth pupae that resides inside. In the present investigation, the microstructure and thermal property of the Chinese tussah silkworm (Antheraea pernyi) cocoon in both warm and cold environments under windy conditions have been studied by experimental and numerical methods. A new computational fluid dynamics model has been developed according to the original fibrous structure of the Antheraea pernyi cocoon to simulate the unique heat transfer process through the cocoon wall. The structure of the Antheraea pernyi cocoon wall can promote the disorderness of the interior air, which increases the wind resistance by stopping most of the air flowing into the cocoon. The Antheraea pernyi cocoon is wind-proof due to the mineral crystals deposited on the outer layer surface and its hierarchical structure with low porosity and high tortuosity. The research findings have important implications to enhancing the thermal function of biomimetic protective textiles and clothing.
Publisher: World Scientific Pub Co Pte Ltd
Date: 30-09-2016
DOI: 10.1142/S0217984916503346
Abstract: Titanium carbides were studied via molecular dynamics simulation to characterize TiC[Formula: see text] structures with respect to the carbon diffusion properties in this study. The effect of carbon concentration on atomic structures of titanium carbides was investigated through discussing the structure variation and the radial distribution functions of carbon atoms in titanium carbides. The carbon diffusion in titanium carbides was also analyzed, focusing on the dependence on carbon concentration and carbide structure. Carbon diffusivity with different carbon concentrations was determined by molecular dynamics (MD) calculations and compared with the available experimental data. The simulation results showed an atomic exchange mechanism for carbon diffusion in titanium carbide.
Publisher: Elsevier BV
Date: 11-2014
Publisher: Elsevier BV
Date: 09-2012
Publisher: Elsevier BV
Date: 06-2015
Publisher: Elsevier BV
Date: 12-2016
Publisher: Springer Science and Business Media LLC
Date: 22-05-2015
Publisher: Informa UK Limited
Date: 17-01-2015
DOI: 10.3109/10717544.2013.875603
Abstract: The incorporation of a high percentage of targeting molecules into drug delivery system is one of the important methods for improving efficacy of targeting therapeutic drugs to cancer cells. PLGA-based drug delivery carriers with folic acid (FA) as targeting molecule have a low targeting efficiency due to a low FA conjugation ratio. In this work, we fabricated a FA-conjugated PLGA system using a crosslinker 1, 3-diaminopropane and have achieved a high conjugation ratio of 46.7% (mol/mol). The as-prepared PLGA-based biomaterial was used to encapsulate therapeutic drug 5-fluorouracil (5-FU) into nanoparticles. In the in vitro experiments, an IC₅₀ of 5.69 µg/mL has been achieved for 5-FU loaded PLGA-1, 3-diaminopropane-folic acid nanoparticles on HT-29 cancer cells and is significantly lower than that of 5-FU and 5-FU loaded PLGA nanoparticles which only have an IC₅₀ of 22.9 and 14.17 µg/mL, respectively. The fluorescent microscopy images showed that nanoparticles with FA are largely taken up by HT-29 cancer cells and the targeting nanoparticles have more affinity to cancer cells than the pure drugs and untreated nanoparticles. Therefore, the 1, 3-diaminopropane can facilitate the conjugation of FA to PLGA to form a novel polymer and 5-FU loaded PLGA-1, 3-diaminopropane-folic acid nanoparticles can be a highly efficient system for specific delivery of drugs to cancer cells.
Publisher: Springer Science and Business Media LLC
Date: 10-05-2018
Publisher: Elsevier BV
Date: 05-2008
Publisher: Elsevier BV
Date: 07-2008
Publisher: Wiley
Date: 06-10-2020
DOI: 10.1002/POL.20200560
Publisher: American Chemical Society (ACS)
Date: 19-08-2014
DOI: 10.1021/SC500379A
Publisher: Elsevier BV
Date: 03-2014
Publisher: Springer Science and Business Media LLC
Date: 27-02-2015
Publisher: Elsevier BV
Date: 08-2015
Publisher: Elsevier BV
Date: 2018
Publisher: AIP Publishing
Date: 23-01-2014
DOI: 10.1063/1.4861893
Abstract: The behavior of Liquid N,N-dimethylformamide subjected to a wide range of externally applied electric fields (from 0.001 V/nm to 1 V/nm) has been investigated through molecular dynamics simulation. To approach the objective the AMOEBA polarizable force field was extended to include the interaction of the external electric field with atomic partial charges and the contribution to the atomic polarization. The simulation results were evaluated with quantum mechanical calculations. The results from the present force field for the liquid at normal conditions were compared with the experimental and molecular dynamics results with non-polarizable and other polarizable force fields. The uniform external electric fields of higher than 0.01 V/nm have a significant effect on the structure of the liquid, which exhibits a variation in numerous properties, including molecular polarization, local cluster structure, rotation, alignment, energetics, and bulk thermodynamic and structural properties.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 2009
Publisher: Elsevier BV
Date: 09-2002
Publisher: Informa UK Limited
Date: 2020
Publisher: Elsevier BV
Date: 12-2014
Publisher: SAGE Publications
Date: 27-11-2015
Abstract: The wild Antheraea pernyi silkworm cocoon is a thin and light-weight structure, yet it has shown effective thermal insulation characteristics against extreme temperature fluctuations, which meet the demands of humans for lighter materials with higher thermal resistance. We present a two-dimensional computational fluid dynamics model of this unique fibrous cocoon structure to simulate the heat transfer process through the cocoon wall. The model is able to predict the temperature field inside the cocoon reasonably well. The results of the model also show that the mineral crystals present in the outer layers of the Antheraea pernyi cocoon can increase air flow resistance and decrease the effect of natural convection, which further reduces the heat transfer through the cocoon wall effectively. This has practical significance for the development of thermal functional textiles and composite structures.
Publisher: Elsevier BV
Date: 07-2012
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 02-2011
Publisher: Elsevier BV
Date: 10-2013
Publisher: Elsevier BV
Date: 2010
Publisher: Elsevier BV
Date: 11-2007
Publisher: Elsevier BV
Date: 09-2013
Publisher: Springer Science and Business Media LLC
Date: 28-11-2014
Publisher: Elsevier BV
Date: 11-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4SM00589A
Abstract: A sufficient and well dispersed silica network stabilizes the nanostructure in cross-linked poly(ethylene glycol) diacrylate templated from hexagonal lyotropic liquid crystals (LLC).
Publisher: ASTM International
Date: 11-09-2014
DOI: 10.1520/MPC20130107
Publisher: Springer Science and Business Media LLC
Date: 20-12-2017
Publisher: Elsevier BV
Date: 02-2018
Publisher: American Chemical Society (ACS)
Date: 12-04-2016
Abstract: The potential of superhydrophobic and superoleophilic microwrinkled reduced graphene oxide (MWrGO) structures is here demonstrated for oil spill cleanup. The impact of the thickness of MWrGO films on the sorption performance of three different oils was investigated. Water contact angles across the MWrGO surfaces were found to exceed 150°, while oil could be easily absorbed by the microwrinkled structures of MWrGO within seconds after contact. Although the oil surface diffusion rate was not found to be dependent on the thickness of the graphene oxide films, the oil sorption capacity was the largest with the thinner MWrGO films due to the high surface area resulting from their fine surface texture. Furthermore, the composite films can be repeatedly used for at least 20 oil sorption-removal cycles without any notable loss in selectivity and uptake capacity. These MWrGO/elastomer composite films could be applied as a potential candidate material for future oil spill cleanup.
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 10-2015
Publisher: MDPI AG
Date: 25-03-2021
Abstract: Surface texturing is a common modification method for altering the surface properties of a material. Predicting the response of a textured surface to scratching is significant in surface texturing and material design. In this study, scratches on a thermoplastic material with textured surface are simulated and experimentally tested. The effect of texture on scratch resistance, surface visual appearance, surface deformation and material damage are investigated. Bruise spot scratches on textured surfaces are found at low scratch forces ( N) and their size at different scratch forces is approximately the same. There is a critical point between the bruise spot damage and the texture pattern damage caused by continuous scratching. Scratch resistance coefficients and an indentation depth-force pattern are revealed for two textured surfaces. A texture named “Texture CB” exhibits high effectiveness in enhancing scratch visibility resistance and can increase the scratch resistance by more than 40% at low scratch forces. The simulation method and the analysis of the power spectral density of the textured surface enable an accurate prediction of scratches.
Publisher: MDPI AG
Date: 05-10-2018
DOI: 10.20944/PREPRINTS201810.0110.V1
Abstract: The alignment of nanostructures in materials such as lyotropic liquid crystals (LLCs) templated materials has the potential to signicantly improve their performances. However, accurately characterising and quantifying the alignement of such fine structures remains very challenging. In situ small angle X-ray scattering (SAXS) and molecular dynamics were employed for the first time to understand the hexagonal LLC alignment process with magnetic nanoparticles under a magnetic field. The enhanced alignment has been illustrated from the distribution of azimuthal intensity in the s les exposed to magnetic field. Molecular dynamics simulations reveal the relationship between the imposed force of the magenetic nanoparticles under magnetic field and the force transferred to the LLC cylinders which leads to the LLC alignment. The combinational study with experimental measurement and computational simulation will enable the development and control of nanostructures in novel materials for various applications.
Publisher: Elsevier BV
Date: 09-2015
Publisher: Springer Science and Business Media LLC
Date: 03-2016
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 11-2015
Publisher: Springer Science and Business Media LLC
Date: 06-06-2018
Publisher: Wiley
Date: 10-07-2014
DOI: 10.1002/PEN.23690
Publisher: American Vacuum Society
Date: 25-05-2016
DOI: 10.1116/1.4952451
Abstract: A silkworm cocoon is a porous biological structure with multiple protective functions. In the current work, the authors have used both experimental and numerical methods to reveal the unique moisture transfer characteristics through a wild Antheraea pernyi silkworm cocoon wall, in comparison with the long-domesticated Bombyx mori silkworm cocoon walls. The water vapor transmission and water vapor permeability (WVP) properties show that the A. pernyi cocoons exhibit directional moisture transfer behavior, with easier moisture transfer from inside out than outside in [e.g., the average WVP is 0.057 g/(h m bar) from inside out and is 0.034 g/(h m bar) from outside in]. Numerical analysis shows that the cubic mineral crystals in the outer section of the A. pernyi cocoon wall create a rough surface that facilitates air turbulence and promotes disturbance litude of the flow field, leading to lengthened water vapor transfer path and increased tortuosity of the moist air. It also indicates the vortex of water vapor can be generated in the outer section of cocoon wall, which increases the diffusion distance of water vapor and enhances the turbulence kinetic energy and turbulence eddy dissipation, signifying higher moisture resistance in the outer section. The difference in moisture resistance of the multiple A. pernyi cocoon layers is largely responsible for the unique directional moisture transfer behavior of this wild silkworm cocoon. These findings may inspire a biomimicry approach to develop novel lightweight moisture management materials and structures.
Publisher: Informa UK Limited
Date: 02-2006
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 10-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA11816B
Abstract: A novel hierarchical porous C/LiFePO 4 /bio-C composite was fabricated by using artemia cyst shells as natural biological template and revealed an excellent high rate performance.
Publisher: Elsevier BV
Date: 05-2018
Publisher: Springer Science and Business Media LLC
Date: 22-05-2017
DOI: 10.1038/S41598-017-02028-0
Abstract: Materials with a layered structure have attracted tremendous attention because of their unique properties. The ultrathin nanosheet structure can result in extremely rapid intercalation/de-intercalation of Na ions in the charge–discharge progress. Herein, we report a manganese oxide with pre-intercalated K and Na ions and having flower-like ultrathin layered structure, which was synthesized by a facile but efficient hydrothermal method under mild condition. The pre-intercalation of Na and K ions facilitates the access of electrolyte ions and shortens the ion diffusion pathways. The layered manganese oxide shows ultrahigh specific capacity when it is used as cathode material for sodium-ion batteries. It also exhibits excellent stability and reversibility. It was found that the amount of intercalated Na ions is approximately 71% of the total charge. The prominent electrochemical performance of the manganese oxide demonstrates the importance of design and synthesis of pre-intercalated ultrathin layered materials.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP03366G
Abstract: Regular Mn 3 O 4 hexagonal nanoplates are synthesized for a supercapacitor electrode. This electrode exhibits excellent cycling stability with 100% capacity retention after 5000 cycles.
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 10-2015
Publisher: ASTM International
Date: 09-2012
DOI: 10.1520/MPC104531
Publisher: Elsevier BV
Date: 2009
Start Date: 2007
End Date: 12-2008
Amount: $370,000.00
Funder: Australian Research Council
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