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  1. No Access

    Article

    Optical and electrical properties of semi-insulating GaN:C grown by MBE

    Semi-insulating wurtzite GaN:C of high optical quality is obtained with CCl4 or CS2 do** sources in plasma-assisted molecular-beam epitaxy in Ga-rich growth conditions. The highest resistivity (107 Ω-cm) is fou...

    R. Armitage, Qing Yang, H. Feick, S. Y. Tzeng, J. Lim… in MRS Online Proceedings Library (2011)

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    Article

    Thermally stimulated current spectroscopy of carbon-doped GaN grown by molecular beam epitaxy

    Deep traps in semi-insulating (SI) or high-resistivity C-doped GaN grown by metal-organic chemical-phase deposition or molecular-beam epitaxy have been studied by thermally stimulated current (TSC) spectroscop...

    Z-Q. Fang, D. C. Look, R. Armitage, Q. Yang, E. R. Weber in MRS Online Proceedings Library (2003)

  3. Article

    P- and N-type Do** of Non-Polar A-plane GaN Grown by Molecular-Beam Epitaxy on R-plane Sapphire

    Non-polar a-plane GaN films doped with Si or Mg were grown by plasma-assisted molecular-beam epitaxy on r-plane sapphire substrates. The ( $$11...

    R. Armitage, Qing Yang, Eicke R. Weber in MRS Internet Journal of Nitride Semiconduc… (2003)

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    Article

    A method to pattern Pd over-layers on GdMg films and its application to increase the transmittance of metal hydride optical switches

    A process to pattern Pd over-layers on reactive metal films was developed using ion milling through a tungsten trioxide mask patterned by photolithography and wet etching. The WO3 mask exhibited a low Ar+ sputter...

    R. Armitage, M. Cich, M. Rubin, E.R. Weber in Applied Physics A (2000)

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    Article

    A new primary screening test for anthelmintics utilizing the parasitic stages ofNippostrongylus brasiliensis, in vitro

    A new in vitro test suitable for the large scale screening of chemical compounds for anthelmintic activity is described. The test which utilizes the fourth larval and adult stages ofNippostrongylus brasiliensis i...

    D. C. Jenkins, R. Armitage, T. S. Carrington in Zeitschrift für Parasitenkunde (1980)