Browsing General by Author "Phillips, Matthew"

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Browsing General by Author "Phillips, Matthew"

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  • Ton-That, Cuong; Phillips, Matthew; Nguyen, Thien-Phap (Elsevier Inc, 2008)
    Luminescence properties of nanocomposites consisting of ZnO nanoparticles in a conjugated polymer, poly [2-methoxy-5-(2?-ethyl hexyloxy)-phenylene vinylene] (MEH-PPV), were investigated. Photoluminescence measurements ...
  • Phillips, Matthew; Telg, Hagen; Kucheyev, Sergei; Gelhausen, Olaf; Toth, Milos (Cambridge Univ Press, 2003)
    Cathodoluminescence (CL) spectra from silicon doped and undoped wurtzite n-type GaN have been measured in a SEM under a wide range of electron beam excitation conditions, which include accelerating voltage, beam current, ...
  • Foley, Matthew; Ton-That, Cuong; Phillips, Matthew (Amer Institue of Physics, 2008)
    Luminescence properties of vertically aligned, crystalline ZnO nanorods are studied by cathodoluminescence (CL) spectroscopy and microscopy. Results show that luminescence characteristics vary dramatically with location ...
  • Phillips, Matthew; Drouin, Dominique (Cambridge University Press, 2006)
    NA
  • Phillips, Matthew; Drouin, Dominique (Cambridge University Press, 2006)
    Progress in field emission display (FED) technology requires the parallel development of phosphors that exhibit high cathodoluminescence (CL) efficiency at low voltage (< 1 kV) excitation and long term CL stability when ...
  • Mcbean, Katie; Phillips, Matthew; Drouin, Dominique (Cambridge University Press, 2006)
    Zinc oxide (ZnO) is a wide band-gap (3.37 eV) semiconductor with a large exciton binding energy of 60 meV. Because of these properties, ZnO is a good candidate for a wide range of applications, including varistors, phosphors ...
  • Toth, Milos; Phillips, Matthew; Craven, J; Thiel, Bradley; Donald, Athene (American Institute of Physics, 2002)
    We report on the properties of electric fields generated as a result of electron irradiation of dielectrics in a low vacuum scanning electron microscope. Individual field components produced by (i) ionized gas molecules ...
  • Toth, Milos; Phillips, Matthew; Thiel, Bradley; Donald, Athene (American Institute of Physics, 2002)
    We demonstrate that if charging caused by electron irradiation of an insulator is controlled by a defocused flux of soft-landing positive ions, secondary electron (SE) images can contain contrast due to lateral variations ...
  • Phillips, Matthew; Morgan, Scott (Cambridge university Press, 2006)
    Secondary electron (SE) imaging in a variable pressure SEM has necessitated the development of new detector technologies. One approach is to measure the charge, Q, induced on a positive electrode placed at some distance, ...
  • Phillips, Matthew; Drouin, Dominique; Moody, Steven; Ton-That, Cuong (Cambridge University Press, 2009)
    NA
  • Dredge, Paula; Wuhrer, Richard; Phillips, Matthew (Cambridge Univ Press, 2003)
    An oil painting by Claude Monet, Port-Goulphar, Belle-Ile 1887 (collection of the Art Gallery of New South Wales), was examined to determine both the identity of the pigments used by the artist in this painting and his ...
  • Wuhrer, Richard; Moran, Ken; Phillips, Matthew (Cambridge University Press, 2008)
    X-ray mapping with Silicon Drift detectors (SDD?s) and multi-EDS detector systems has become an invaluable analysis technique because the time to perform an x-ray map is reduced considerably. Live x-ray imaging can now ...
  • Phillips, Matthew; Drouin, Dominique; Goldys, Ewa (Cambridge University Press, 2006)
    NA
  • Phillips, Matthew; Drouin, Dominique; Pauc, N (Cambridge Univesity Press, 2006)
    The increasing application of GaN in blue and UV light emitting diodes and lasers has generated considerable interest in its optical and electrical properties. These optical devices exhibit extremely high emission efficiencies ...
  • Malguth, Enno; Hoffmann, Axel; Gehlhoff, W; Gelhausen, Olaf; Phillips, Matthew; Xu, X (American Physical Soc, 2006)
    This work provides a consistent picture of the structural, optical, and electronic properties of Fe-doped GaN. A set of high-quality GaN crystals doped with Fe at concentrations ranging from 5x10(17) cm(-3) to 2x10(20) ...
  • Malguth, Enno; Hoffmann, Axel; Phillips, Matthew (American Institute of Physics, 2008)
    We present the results of cathodoluminescence experiments on a set of Fe doped GaN samples with Fe concentrations of 5?1017, 1?1018, 1?1019, and 2?1020 cm-3. These specimens were grown by hydride vapor phase epitaxy with ...
  • Ton-That, Cuong; Phillips, Matthew; Foley, Matthew; Moody, Steven; Stampfl, Anton (Amer Inst Physics, 2008)
    The surface electronic structure of ZnO nanoparticles has been studied with photoemission and x-ray absorption spectroscopies. Contrary to expectation, ZnO:Zn phosphor nanoparticles were found to contain a lower oxygen ...
  • Mcbean, Katie; Phillips, Matthew; Goldys, Ewa (Cambridge Univ Press, 2006)
    Zinc oxide (ZnO) nanoparticles have been produced using precipitation methods from ethanolic solution. Rare-earth metal doping was performed, and the effect of lithium codoping on the luminescence properties of the rare-earth ...
  • Wojcik, Aleksandra; Kopalko, Krzysztof; Godlewski, Marek; Lusakowska, Elzbieta; Guziewicz, Elzbieta; Minikayev, Roman; Paszkowicz, Wojciech; Swiatek, Krzysztof; Klepka, Marcin; Jakiela, Rafal; Kiecana, Michel; Sawicki, Maciej; Dybko, Krzysztof; Phillips, Matthew (Institute of Physics, Wroclaw University of Technology and SPIE - The International Society for Opti, 2005)
    We discuss properties of thin films of ZnO and ZnMnO grown with atomic layer epitaxy using new, organic zinc and manganese precursors. Several characterization techniques, including X-ray diffraction, atomic force microscopy, ...
  • Wuhrer, Richard; Moran, Ken; Phillips, Matthew (Cambridge university Press, 2006)
    Characterisation of materials frequently involves the determination of variation in composition, structure and microstructure, by the use of a variety of imaging and analysis techniques. There is an increasing need to ...