Publications
271 results found
Chen S, Goode AE, Sweeney S, et al., 2013, Sulfidation of silver nanowires inside human alveolar epithelial cells: a potential detoxification mechanism, NANOSCALE, Vol: 5, Pages: 9839-9847, ISSN: 2040-3364
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- Citations: 50
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed. © 2012 OSA.
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed. © 2012 OSA.
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed. © 2012 OSA.
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed. © 2012 OSA.
Hannemann U, Lyubina J, Ryan MP, et al., 2012, Thermopower of LaFe<sub>13-x</sub>Si<sub>x</sub> alloys, EPL, Vol: 100, ISSN: 0295-5075
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- Citations: 9
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed.
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
© 2012 OSA. A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed.
Lyubina J, Hannemann U, Cohen LF, et al., 2012, Novel La(Fe,Si)<sub>13</sub>/Cu Composites for Magnetic Cooling, ADVANCED ENERGY MATERIALS, Vol: 2, Pages: 1323-1327, ISSN: 1614-6832
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- Citations: 65
Cruickshank AC, Dotzler CJ, Din S, et al., 2012, The Crystalline Structure of Copper Phthalocyanine Films on ZnO(1(1)over-bar00), JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 134, Pages: 14302-14305, ISSN: 0002-7863
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- Citations: 25
Dunlop IE, Ryan MP, Weaver JVM, 2012, One-step preparation of bioapplicable nanoparticles using branched copolymer nanoreactors, 244th National Fall Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Corni I, Chater RJ, Boccaccini AR, et al., 2012, Electro co-deposition of Ni-Al<sub>2</sub>O<sub>3</sub> composite coatings, JOURNAL OF MATERIALS SCIENCE, Vol: 47, Pages: 5361-5373, ISSN: 0022-2461
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- Citations: 34
Lyubina J, Hannemann U, Ryan MP, et al., 2012, Electrolytic Hydriding of LaFe13-xSix Alloys for Energy Efficient Magnetic Cooling, ADVANCED MATERIALS, Vol: 24, Pages: 2042-2046, ISSN: 0935-9648
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- Citations: 30
Ingham B, Gaston N, Fahy K, et al., 2012, Extended X-ray Absorption Fine Structure and X-ray Diffraction Examination of Sputtered Nickel Carbon Binary Thin Films for Fuel Cell Applications, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 116, Pages: 6159-6165, ISSN: 1932-7447
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- Citations: 8
Franklin JB, Downing JM, Giuliani F, et al., 2012, Building on Soft Foundations – New Possibilities for Controlling Hybrid Photovoltaic Architectures, Advanced Energy Materials
Here we outline a methodology for the deposition of a highly crystalline transparent conductive metal oxide (ZnO) onto a functionalised organic thin film poly (3-hexylthiophene, P3HT) without degradation of the microstructural, optical or electronic properties of the organic layer. To confirm the absence of damage we have assembled a simple bilayer photovoltaic (PV) device. The processing methodology has enabled us to demonstrate hybrid photovoltaic (h-PV) device formation in the conventional architecture for the first time. The compatibility of this novel low temperature processing route with π-conjugated molecular materials has tremendous potential for applications including electron accepting layers and optical spacers in organic PVs and light emitting diodes, as transparent electrodes and all future devices reliant on flexible substrates.
Pang JS, Xie F, Centeno A, et al., 2012, Optical absorption of metal nanoparticle arrays
A study into the enhanced optical absorption due to metal nanoparticle arrays fabricated by nanosphere lithography. Prediction and measurement has been undertaken. Implementation to improve the efficiency of PV solar cells is discussed. © 2012 OSA.
Moorhouse BS, Ward-Close M, Ryan MP, et al., 2012, Calciothermic Reduction of Ti-6Al-4V, 12th World Conference on Titanium (Ti-2011), Publisher: SCIENCE PRESS BEIJING, Pages: 1662-1665
Goode AE, Perkins JM, Sandison A, et al., 2012, Chemical speciation of nanoparticles surrounding metal-on-metal hips, CHEMICAL COMMUNICATIONS, Vol: 48, Pages: 8335-8337, ISSN: 1359-7345
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- Citations: 42
Aili D, Gryko P, Sepulveda B, et al., 2011, Polypeptide Folding-Mediated Tuning of the Optical and Structural Properties of Gold Nanoparticle Assemblies, NANO LETTERS, Vol: 11, Pages: 5564-5573, ISSN: 1530-6984
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- Citations: 50
Dotzler CJ, Ingham B, Illy BN, et al., 2011, In Situ Observation of Strain Development and Porosity Evolution in Nanoporous Gold Foils, ADVANCED FUNCTIONAL MATERIALS, Vol: 21, Pages: 3938-3946, ISSN: 1616-301X
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- Citations: 55
Pishbin F, Simchi A, Ryan MP, et al., 2011, Electrophoretic deposition of chitosan/45S5 Bioglass® composite coatings for orthopaedic applications, SURFACE & COATINGS TECHNOLOGY, Vol: 205, Pages: 5260-5268, ISSN: 0257-8972
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- Citations: 128
McLachlan MA, Rahman H, Illy B, et al., 2011, Electrochemical deposition of ordered macroporous ZnO on transparent conducting electrodes, Materials Chemistry and Physics, Pages: 343-348
Large area macroporous zinc oxide (ZnO) films have been prepared by colloidal crystal templating on to transparent conducting oxide (TCO) substrates using an electrochemical deposition technique. Characterisation by scanning electron microscopy (SEM) reveals changes in the microstructure of the ZnO films as the template diameter and deposition potential are varied. Analysis by X-ray diffraction (XRD) and UV-Vis spectroscopy show that the structural variations do not influence the inherent properties of the ZnO. We attribute the observed microsturctural differences to variations in growth kinetics in response to the applied deposition potential and solution transport phenomena that are controlled by the template dimensions. The optical properties of the structures exhibit two distinct features, originating from the optical bandgap of the ZnO and the photonic band gap of the ordered macroporous structure.
Illy BN, Cruickshank AC, Schumann S, et al., 2011, Electrodeposition of ZnO layers for photovoltaic applications: controlling film thickness and orientation, Journal of Materials Chemistry
Illy BN, Cruickshank AC, Da Campo R, et al., 2011, Electrodeposition of ultrathin ZnO buffer layers with controllable orientation for photovoltaic applications, ISSN: 0065-7727
ZnO is one of the most promising materials for applications in nanotechnology due to its large band gap and high electron mobility. A large amount of work has focused on the study of nanostructured ZnO. However, two dimensional transparent compact layers are also of great interest as transparent conductive oxides in optoelectronic devices. Compact ZnO layers are usually deposited by methods which are generally costly thus significantly limiting their potential application. Electrodeposition is a low cost alternative, offering a high degree of control on the characteristics. In this work the effects of the deposition parameters on the film characteristics have been studied in order to fabricate the thinnest electrodeposited films ever reported and to tune the crystallographic orientation. Incorporation of the layer into an organic ZnO/P3HT:PCBM solar cell is used to demonstrate how a careful control of the orientation can dramatically improve the photovoltaic device efficiency.
Cruickshank A, Tay S, Illy B, et al., 2011, Electrodeposition of ZnO Nanostructures on Molecular Thin Films, Chemistry of Materials, Vol: 23, Pages: 3863-3870, ISSN: 1520-5002
Electrodeposition of highly crystalline ZnO nanostructures directly onto copper phthalocyanine and pentacene thin films, from aqueous solutions containing zinc nitrate and dissolved oxygen, has been successfully demonstrated for the first time using a two-step electrochemical deposition process. Importantly, surface activation of the molecular thin film substrates by depositing a thin layer of ZnO nanoparticles at high cathodic overpotentials prior to film growth was found to be crucial for achieving a dense coverage of ZnO nanostructures with uniform morphology. The mechanism for ZnO deposition via electroreduction of hydroxide precursor species (oxygen and NO3– ions) at the organic-electrolyte interface was shown to be analogous to that reported for conventional inorganic and metal electrodes. Comparison of cathodic current density-time curves, measured during deposition, with film orientation and morphology revealed that the cathodic current density and number of nucleation sites are key factors in determining the characteristics of ZnO film growth on organic substrates. Significantly, the CuPc and pentacene films are not damaged or degraded during this process.
Skinner SJ, Packer RJ, Bayliss RD, et al., 2011, Redox chemistry of the novel fast oxide ion conductor CeNbO<sub>4+<i>d</i></sub> determined through an <i>in</i>-<i>situ</i> spectroscopic technique, 17th International Conference on Solid State Ionics, Publisher: ELSEVIER SCIENCE BV, Pages: 659-663, ISSN: 0167-2738
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- Citations: 9
Franklin JB, Zou B, Petrov P, et al., 2011, Optimised Pulsed Laser Deposition of ZnO Thin Films on Transparent Conducting Substrates, Journal of Materials Chemistry, Vol: 21, Pages: 8178-8182
The growth of polycrystalline zinc oxide (ZnO) thin films by pulsed laser deposition (PLD) on indium tin oxide (ITO) is reported. For the first time the influence of deposition temperature over an extended range (50 - 650 °C) is investigated on ITO. We describe the role of temperature on the optical and crystalline properties of the deposited films, of 120-250 nm thickness. Additionally, the effect of the background oxygen pressure is reported. Under all of the deposition conditions highly textured c-axis oriented ZnO, transparent (> 85%) and low roughness (RMS < 10 nm) films are formed. Growth temperatures ≥ 450 ˚C lead to the highest degree of crystallinity and film quality with measured full width half maximum (FWHM) of X-ray diffraction (XRD) peaks as small as 0.14 ˚2θ. XRD measurements of films grown at < 350 °C show a shift in the (002) diffraction peak to lower 2θ values, indicating that the deposited films are oxygen deficient. Increasing the oxygen pressure results in the preparation of stoichiometric films at temperatures as low as 50 °C. We demonstrate that in addition to forming high quality ZnO, the optical and electronic properties of ITO can be preserved, even at high temperature, presenting a methodology for preparing highly crystalline ZnO on ITO over a temperature window significantly larger than that of previous literature reports. Furthermore, the low temperature processing opens up the possibility of deposition on a wide range of substrates, especially those unsuitable for exposure to high temperatures.
Mclachlan MA, McComb DW, Ryan MP, et al., 2011, Probing local and global ferroelectric phase stability and polarization switching in ordered macroporous PZT, Advanced Functional Materials, Vol: 21, Pages: 941-947
We describe the characterization, ferroelectric phase stability and polarization switching in strain-free assemblies of PbZr0.3Ti0.7O3 (PZT) nanostructures. The 3-dimensionally ordered macroporous structures present uniquely large areas and volumes of PZT where the microstructure is spatially modulated and the composition is homogeneous. Variable temperature powder X-ray diffraction (XRD) studies show that the global structure is crystalline and tetragonal at room temperature and undergoes a reversible tetragonal to cubic phase transition on heating/cooling. The measured phase-transition temperature is 50 – 60 °C lower than bulk PZT of the same composition. The local ferroelectric properties were assessed using piezoresponse force spectroscopy that reveal an enhanced piezoresponse from the nanostructured films and demonstrate that the switching polarization can be spatially mapped across these structures. An enhanced piezoresponse is observed in the nanostructured films which we attribute to the formation of strain free films, thus for the first time we are able to assess the effects of crystallite-size independently of internal stress. Corresponding polarization distributions have been calculated for the bulk and nanostructured materials using a direct variational method and Landau-Ginzburg-Devonshire (LGD) theory. By correlating local and global characterisation techniques we have for the first time unambiguously demonstrated the formation of tetragonal and ferroelectric PZT in large volume nanostructured architectures. With the wide range of materials available that can be formed into such controlled architectures we conclude that this study opens a pathway for the effective studies of nanoscale ferroelectrics in uniquely large volumes
Chater RJ, Corni I, Boccaccini AR, et al., 2011, Three-dimensional reconstruction of a nickel-alumina composite coating by FIB-SIMS, SURFACE AND INTERFACE ANALYSIS, Vol: 43, Pages: 492-494, ISSN: 0142-2421
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- Citations: 4
Downing J, Ryan MP, Stingelin N, et al., 2011, Solution Processed Hybrid Photovoltaics - The Preparation of a Standard ZnO Template, Journal of Photonics for Energy, 2011, Vol: 1
The formation of a well-defined, reproducible ZnO nanorod scaffolds for hybrid photovoltaic (h-PV) applications has been investigated. A standard hydrothermal growth method was used and the influence of chemical additions in controlling length, width, density and orientation was studied. The nanostructures prepared have been characterised by scanning electron microscopy, X-ray diffraction, UV-Vis spectroscopy in addition to measurement of the wetting behaviour. A standard procedure for the production of vertically orientated nanorods with a narrow size distribution, high areal density and good wettability in aqueous solutions is presented.
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