Balzani, V, Credi, A, Langford, SJ, Raymo, FM, Stoddart, JF & Venturi, M 2000, 'Constructing Molecular Machinery: A Chemically-Switchable [2]Catenane', Journal of the American Chemical Society, vol. 122, no. 14, pp. 3542-3543.
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Bellec, N, Garrido Montalban, A, Williams, DBG, Cook, AS, Anderson, ME, Feng, X, Barrett, AGM & Hoffman, BM 2000, 'Porphyrazinediols: Synthesis, Characterization, and Complexation to Group IVB Metallocenes', The Journal of Organic Chemistry, vol. 65, no. 6, pp. 1774-1779.
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Billing, DG, Holzapfel, CW, Blann, K & Williams, DBG 2000, 'meso-2,2′-Diphenyl-3,3′,4,4′-tetrahydro-2,2′-bifuran-5,5′(2H,2′H)-dione', Acta Crystallographica Section C Crystal Structure Communications, vol. 56, no. 11, pp. e522-e523.
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Cortie, MB & Levey, FC 2000, 'Structure and ordering of the 18-carat Al-Au-Cu beta-phase', INTERMETALLICS, vol. 8, no. 7, pp. 793-804.
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Gold alloys with around 30 at% copper and 25 at% aluminium undergo a reversible displacive transformation with M-s and A(s) temperatures of about 30 and 75 degrees C respectively. However, the nature of the parent and product phases in this system has no
Delfs, CD, Stranger, R, Humphrey, MG & McDonagh, AM 2000, 'Trends in back-bonding in the series trans-[M(CCR)Cl(PH3)4] (M=Fe, Ru, Os; R=H, Ph, C6H4NO2-4)', Journal of Organometallic Chemistry, vol. 607, no. 1-2, pp. 208-212.
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The electronic structure of the complexes trans-[M(C=CR)Cl(PH3)4] (M=Fe, Ru, Os; R=H, Ph, C6H4NO2-4) has been investigated using approximate density functional theory in order to examine the M=C back-bonding interaction. For all three metal systems, the p back-bonding increases in the order R=H
Fu, SL, Wang, HJ, Davies, M & Dean, R 2000, 'Reactions of hypochlorous acid with tyrosine and peptidyl-tyrosyl residues give dichlorinated and aldehydic products in addition to 3-chlorotyrosine', JOURNAL OF BIOLOGICAL CHEMISTRY, vol. 275, no. 15, pp. 10851-10858.
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Godlewski, M, Goldys, EM & Phillips, MR 2000, 'Cathodoluminescence studies of in-plane and in-depth properties of GaN epilayers', JOURNAL OF LUMINESCENCE, vol. 87-9, pp. 1155-1157.
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Godlewski, M, Goldys, EM, Phillips, MR, Langer, R & Barski, A 2000, 'Cathodoluminescence depth-profiling studies of GaN/AlGaN quantum-well structures', JOURNAL OF MATERIALS RESEARCH, vol. 15, no. 2, pp. 495-501.
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Godlewski, M, Goldys, EM, Phillips, MR, Langer, R & Barski, A 2000, 'Cathodoluminescence depth-profiling studies of GaN/AlGaN quantum-well structures', Journal of Materials Research, vol. 15, no. 2, pp. 495-501.
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In this paper we evaluate the in-depth homogeneity of GaN epilayers and the influence of electric field present in strained GaN/AlGaN heterostructures and quantum wells on the yellow and 'edge' emission in GaN and AlGaN. Our depth-profiling cathodoluminescence measurements show an increased accumulation of defects at the interface. Inhomogeneities in the doping level are reflected by the enhancement of the yellow emission in the interface region. The piezoelectric effect is found to strongly reduce the emission from the strained AlGaN quantum-well barriers. We also show that Ga droplets, commonly found on surfaces of samples grown in Ga-rich conditions, screen the internal electric field in a structure and thus result in a local enhancement of the edge emission intensity.
Goldys, EM, Godlewski, M, Phillips, MR & Toropov, AA 2000, 'Photo- and cathodoluminescence investigations of piezoelectric GaN/AlGaN quantum wells', MRS Proceedings, vol. 639, pp. G6.12.1-G6.12.5.
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ABSTRACTWe have examined multiple quantum well AlGaN/GaN structures with several quantum wells of varying widths. The structures had strain-free quantum wells and strained barriers. Strong piezoelectric fields in these structures led to a large red shift of the PL emission energies and long decay times were also observed. While the peak energies could be modelled using the effective mass approximation, the calculated free exciton radiative lifetimes were much shorter than those observed in experiments, indicating an alternative recombination mechanism, tentatively attributed to localised excitons. Cathodoluminescence depth profiling revealed an unusually small penetration range of electrons suggesting that electron-hole pairs preferentially remain within the multiple quantum well region due to the existing electric fields. Spatial fluctuations of the cathodoluminescence intensity were also observed.
Hachiya, S-I, Cook, AS, Williams, DBG, Montalban, AG, Barrett, AGM & Hoffman, BM 2000, 'Synthesis, Characterization and Reactions of Enantiomerically Pure ‘Winged’ Spirane Porphyrazines', Tetrahedron, vol. 56, no. 35, pp. 6565-6569.
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Kucheyev, SO, Bradby, JE, Williams, JS, Jagadish, C, Toth, M, Phillips, MR & Swain, MV 2000, 'Nanoindentation of epitaxial GaN films', APPLIED PHYSICS LETTERS, vol. 77, no. 21, pp. 3373-3375.
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Levey, FC, Cortie, MB & Cornish, LA 2000, 'Displacive transformations in Au-18 wt pct Cu-6 wt pct Al', METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 31, no. 8, pp. 1917-1923.
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A gold alloy with 18 wt pct Cu and 6 wt pet Al undergoes a reversible displacive phase transformation between an incompletely ordered L2(1) parent phase and a tetragonal product. The characteristics of these transformations were studied using acoustic em
Masens, C, Schulte, J, Phillips, M & Dligatch, S 2000, 'Ultra flat gold surfaces for use in chemical force microscopy: Scanning probe microscopy studies of the effect of preparation regime on surface morphology', MICROSCOPY AND MICROANALYSIS, vol. 6, no. 2, pp. 113-120.
McDonagh, AM, Bayly, SR, Riley, DJ, Ward, MD, McCleverty, JA, Cowin, MA, Morgan, CN, Varrazza, R, Penty, RV & White, IH 2000, 'A Variable Optical Attenuator Operating in the Near-Infrared Region Based on an Electrochromic Molybdenum Complex', Chemistry of Materials, vol. 12, no. 9, pp. 2523-2524.
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McDonagh, AM, Cifuentes, MP, Lucas, NT, Humphrey, MG, Houbrechts, S & Persoons, A 2000, 'Organometallic complexes for nonlinear optics', Journal of Organometallic Chemistry, vol. 605, no. 2, pp. 184-192.
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The terminal alkyne 4-HC6-point triple bond; length half of m-dashCC6H4N=Image H (1) and ruthenium complex derivatives trans-[Ru(C6-point triple bond; length half of m-dashC-4-C6H4N= Image Full-size image H}Cl(dppm)2] (2) and [Ru{C6-point triple bond; length half of m-dashC-4-C6H4N=Image H}(PPh3)2(?-C5H5)] (3) have been synthesized. An X-ray structural study of 3 reveals the expected equivalent C---C bond lengths of the phenyl and alternating C---C and C=C bond lengths of the quinonal ring in the indoanilinoalkynyl ligand; there is a dihedral angle of 47.59° between the phenyl and quinonal rings, probably a result of ortho-hydrogen repulsion. Metal-centred oxidation potentials of 2 and 3 are similar to those of `extended chain 4-nitroarylalkynyl complex analogues. Irreversible quinonal ring-centred reductions occur at significantly more negative potentials than the quasi-reversible reductions in their nitro-containing analogues. Quadratic optical nonlinearities by hyper-Rayleigh scattering at 1064 nm for 2 (417×10-30 esu) and 3 (658×10-30 esu) are both large, but resonance enhanced. Two-level-corrected nonlinearities for these complexes (124×10-30, 159×10-30 esu, respectively) are also large, despite the presence of electron-donating tert-butyl groups reducing the efficiency of the (formally) electron-accepting quinonal ring in these donor-bridge-acceptor complexes
McDonagh, AM, Lucas, NT, Cifuentes, MP, Humphrey, MG, Houbrechts, S & Persoons, A 2000, 'Organometallic complexes for nonlinear optics', Journal of Organometallic Chemistry, vol. 605, no. 2, pp. 193-201.
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The syntheses of the alkyne (E)-4,4?-HC6-point triple bond; length half of m-dashCC6H4N=NC6H4NO2 (1) and alkynyl complexes LnM{(E)-4,4?-C6-point triple bond; length half of m-dashCC6H4N=NC6H4NO2} [LnM=trans-[RuCl(dppm)2] (2), Ru(PPh3)2(?-C5H5) (3), Au(PPh3) (4)] are reported. A structural study of 2 reveals E stereochemistry about the azo-linkage. Electrochemical data for the ruthenium complexes reveal that the azo-linkage in complexes 2 and 3 perturbs the metal-centred oxidation potential compared to all other alkynyl complexes of similar composition. Quadratic optical nonlinearities by hyper-Rayleigh scattering (HRS) at 1064 nm are very large for 2 and 3, but resonance-enhanced. Comparison of HRS data for 4 with those of Au{(E)-4,4?-C6-point triple bond; length half of m-dashCC6H4X=CHC6H4NO2}(Image hImage ) (X=CH, N) reveals that complex 4 has a significantly larger quadratic nonlinearity than its ene- or imino-linked analogues.
Phillips, MR & Ott, DM 2000, 'Crosstalk caused by nonideal output filters in WDM lightwave systems', IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 12, no. 8, pp. 1094-1096.
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Crosstalk mechanisms due to imperfections of the output demultiplexer in a 1550-nm wavelength-division multiplexed system are explored for the cable television frequency range of 50-800 MHz. Analytic and experimental results show significant crosstalk ca
Toth, M & Phillips, M 2000, 'Space Charge Artefacts in ESEM Images: Shadowing and Contrast', Microscopy & Microanalysis, vol. 6, no. 2, pp. 775-775.
Toth, M & Phillips, MR 2000, 'The effects of space charge on contrast in images obtained using the environmental scanning electron microscope', SCANNING, vol. 22, no. 5, pp. 319-325.
Toth, M & Phillips, MR 2000, 'The role of induced contrast in images obtained using the environmental scanning electron microscope', SCANNING, vol. 22, no. 6, pp. 370-379.
Toth, M, Kucheyev, SO, Williams, JS, Jagadish, C, Phillips, MR & Li, G 2000, 'Imaging charge trap distributions in GaN using environmental scanning electron microscopy', APPLIED PHYSICS LETTERS, vol. 77, no. 9, pp. 1342-1344.
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Toth, M, Phillips, M & Griffin, B 2000, 'X-ray Microanalysis of Insulators in the ESEM', Microscopy & Microanalysis, vol. 6, no. 2, pp. 786-787.
Williams, DBG, Blann, K & Holzapfel, CW 2000, 'Samarium(II) Iodide Promoted Fragmentation and Sequential Reactions of Aromatic 1,4-Diketones', The Journal of Organic Chemistry, vol. 65, no. 9, pp. 2834-2836.
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Chilakapati, N, Ramsden, VS, Ramaswamy, V & Zhu, JG 1970, 'Comparison of closed-loop speed control schemes for a doubly fed twin stator induction motor drive', IPEMC 2000: THIRD INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, VOLS 1-3, PROCEEDINGS, International Academic Publishers World Publishing Corporation, China, pp. 786-791.
Chilakapati, N, Ramsden, VS, Ramaswamy, V, Zhu, JG & Jayatileke, S 1970, 'Current space vector control of doubly fed twin stator induction machine drive', 2000 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY, VOLS I-III, PROCEEDINGS, IEEE, WA, Australia, pp. 73-78.
Donaton, RA, Iacopi, F, Baklanov, MR, Shamiryan, D, Coenegrachts, B, Struyf, H, Lepage, M, Meuris, M, Van Hove, M, Gray, WD, Meynen, H, De Roest, D, Vanhaelemeersch, S, Maex, K, IEEE & IEEE 1970, 'Physical and electrical characterization of silsesquioxane-based ultra-low k dielectric', PROCEEDINGS OF THE IEEE 2000 INTERNATIONAL INTERCONNECT TECHNOLOGY CONFERENCE, 3rd Annual International Interconnect Technology Conference, IEEE, SAN FRANCISCO, CA, pp. 93-95.
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Godlewski, M, Goldys, EM, Phillips, MR, Ivanov, VY, Langer, R & Barski, A 1970, 'Photo- and cathodoluminescence investigations of piezoelectric GaN/AlGaN quantum well structures', IEEE Semiconducting and Semi-Insulating Materials Conference, SIMC, pp. 31-34.
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We studied high quality quasihomoepitaxial AlGaN/GaN quantum well (QW) heterostructures with high internal electric fields which lead to significant red shifts of exciton emission in wider QWs and an unusually long decay kinetics. The strong electric fields in the structures cause a significant change in the electron penetration range. The fields can be screened under intense electron beam excitation. We propose that electric field fluctuations are the reason for the observed in-plane variation of the CL intensity.
Godlewski, M, Goldys, EM, Phillips, MR, Ivanov, VY, Langer, R & Barski, A 1970, 'Photo- and cathodoluminescence investigations of piezoelectric GaN/AlGaN quantum well structures', 2000 International Semiconducting and Insulating Materials Conference. SIMC-XI (Cat. No.00CH37046), 2000 International Semiconducting and Insulating Materials Conference. SIMC-XI, IEEE, CANBERRA, AUSTRALIA, pp. 31-34.
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Griffin, BJ, Nockolds, CE, Phillips, MR & Remond, G 1970, 'New needs for imaging and x-ray microanalysis standards: ESEM, CHIME and low voltage microanalysis', MICROBEAM ANALYSIS 2000, PROCEEDINGS, Institute of Physics, Hawaii, pp. 395-396.
Gross, KA, Phillips, MR & Suetsugu, Y 1970, 'Cathodoluminescence emission for differentiating the degree of carbonation in apatites', BIOCERAMICS, 13th Int. Symp. On Ceramics in Medicine, Trans tech Publications Ltd, Bologna, pp. 179-182.
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Cathodoluminescence has recently been used successfully in detecting and determining the spatial location of the amorphous phase in plasma sprayed calcium phosphate coatings. The aim of this study is to determine whether this same technique can be used to detect different carbonate substitutions in apatites. Single crystals were analysed with cathodoluminscence spectroscopy and the results indicated a change in peak shape. The substitution of carbonate into the hydroxyapatite structure creates a more well defined peak with a narrower width at half the peak height.
Kucheyev, SO, Bradby, JE, Williams, JS, Swain, MV, Toth, M, Phillips, MR & Jagadish, C 1970, 'Mechanical Properties of As-Grown and Ion-Beam-Modified GaN Films', MRS Proceedings, Springer Science and Business Media LLC.
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ABSTRACTThe deformation behavior of as-grown and ion-beam-modified wurtzite GaN films is studied by a nanoindentation with a spherical indenter. Atomic force microscopy (AFM) and cathodoluminescence are used to characterize the deformation mode. No systematic dependence of the mechanical properties on the film thickness ( at least for thicknesses from 1.8 to 4 μm) as well as on doping type is observed. Results strongly suggest that (i) slip is the major contributor to the plastic deformatio of crystalline GaN and (ii) slip nucleation (rater than a phae transformation) is responsible for “pop-in” events observed during loading. Indentation with an ∼ 4.2 μm radius spherical indenter at maximum loads up to 900 mN does not produce any cracking visible by AFM in crystalline GaN. Instead, under such loads, indentation results in a pronounced elevation of the material around the impression. Implantation disorder dramatically changes the deformation behaviour of GaN. In particular, implanation-produced defects in crystalline GaN syppress (i) “pop-in” events during loading, (ii) slip bands observed by AFM, and (iii) the plastic component of deformation. GaN amorphized by in bombardment exhibits plastic flow even for very low loads. The values of hardness and elastic modulus of amorphous GaN are dramatically reduced compared to those of as-grown GaN.
Kucheyev, SO, Toth, M, Phillips, MR, Williams, JS, Jagadish, C & Li, G 1970, 'Cathodoluminescence study of ion implanted GaN', COMMAD 2000 Proceedings. Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2000 Conference on Optoelectronic amd Microelectronic Materials and Devices, IEEE, LA TROBE UNIV, DEPTS ELECTR ENGN & PHYS, BUNDOORA, AUSTRALIA, pp. 190-193.
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Kucheyev, SO, Williams, JS, Jagadish, C, Zou, J, Toth, M, Phillips, MR & Li, G 1970, 'Ion implantation into GaN: opportunities and problems', 2000 International Semiconducting and Insulating Materials Conference. SIMC-XI (Cat. No.00CH37046), 2000 International Semiconducting and Insulating Materials Conference. SIMC-XI, IEEE, CANBERRA, AUSTRALIA, pp. 47-50.
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Kucheyev, SO, Williams, JS, Jagadish, C, Zou, J, Toth, M, Phillips, MR, Tan, HH, Li, G & Pearton, SJ 1970, 'Surface Disordering and Nitrogen Loss in GaN under Ion Bombardment', MRS Proceedings, Springer Science and Business Media LLC, pp. T791-T796.
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ABSTRACTThe damage build-up and amorphization behavior in wurtzite GaN films under a wide range of implant conditions are studied by Rutherford backscattering / channeling spectrometry, transmission electron microscopy, and cathodoluminescence spectroscopy. A strong surface peak of lattice disorder, in addition to the expected damage peak in the region of the maximum of nuclear energy loss, has been observed for all implant conditions of this study. Capping of GaN with SiOx and SixNy layers prior to implantation does not eliminate surface disordering. This may suggest that nitrogen loss is not the main reason for the observed enhanced surface disorder, but, rather, the GaN surface acts as a strong sink for migrating point defects. However, pronounced loss of N during ion bombardment is observed for high dose implantation when the near-surface region is amorphized. Moreover, after amorphization, annealing at temperatures above about 400°C leads to complete decomposition of the near-surface layer.
Liu, PT & Zhu, JG 1970, 'Performance simulation of a linear variable reluctance permanent magnet motor with current control', Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435), 3rd International Conference on Power Electronics and Motion Control, Int. Acad. Publishers, China, pp. 602-0.
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Lu, HY, Zhu, JG, Ramsden, VS, IEEE, IEEE & IEEE 1970, 'Comparison of experimental techniques for determination of stray capacitances in high frequency transformers', PESC 2000: 31ST ANNUAL IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-3, IEEE, Ireland, pp. 1645-1650.
Phillips, MR & Toth, M 1970, 'Charge neutralization of insulators in an ESEM', MICROBEAM ANALYSIS 2000, PROCEEDINGS, Institute of Physics, Hawaii, pp. 273-274.
Remond, G, Nockolds, CE, Phillips, MR & Cazaux, J 1970, 'Charging phenomena of wide bandgap materials in a VP-SEM.', MICROBEAM ANALYSIS 2000, PROCEEDINGS, Institute of Physics, Hawaii, pp. 269-270.
Remond, G, Phillips, MR & Roques-Carmes, C 1970, 'Importance of Instrumental and Experimental Factors on the Interpretation of Cathodoluminescence Data from Wide Band Gap Materials', CATHODOLUMINESCENCE IN GEOSCIENCES, International Conference on Cathodoluminescence and Related Techniques in Geosciences and Geomaterials, Springer Berlin Heidelberg, NANCY, FRANCE, pp. 59-126.
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Toth, M, Phillips, MR, Kucheyev, SO, Williams, JS, Jagadish, C & Li, G 1970, 'Charge contrast in SE images obtained using the ESEM', MICROBEAM ANALYSIS 2000, PROCEEDINGS, Institute of Physics, Hawaii, pp. 275-276.
