The mean inner potential of GaN measured from nanowires using off-axis electron holography

MRS Online Proceedings Library volume 892, Article number: 1102 (2005) Cite this article

Abstract

The mean inner potentials of wurtzite GaN nanowires are measured using off-axis electron holography in the transmission electron microscope (TEM). The nanowires have a circular cross-section and are suspended across holes in a holey carbon film, resulting in an accurate knowledge of their thickness profiles and orientations. They are also free of the implantation and damage that is present in mechanically-polished ion-milled TEM specimens. The effect of a thin amorphous coating, which is present on the surfaces of the nanowires, on measurements of their mean inner potential is assessed. A value for the mean inner potential of GaN of (16.7 ± 0.3) V is obtained from these samples.

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Acknowledgements

ASW and GWH acknowledge the Cambridge Commonwealth Trust. RDB, RAO and PMDFC also acknowledge the the Royal Society, the Royal Commission for the Exhibition of 1851 and the Engineering and Physical Sciences Research Council (EPSRC) for financial support, respectively.

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Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, United Kingdom

    Andrew S. W. Wong, Rafal Dunin-Borkowski, Takeshi Kasama, Rachel A. Oliver, Pedro M.F.J. Costa & Colin J. Humphreys

  2. Nanoscience Centre, University of Cambridge, 11 JJ Thomson Avenue, Cambridge, CB3 0FF, United Kingdom

    Ghim W. Ho

  3. Frontier Research System, The Institute of Physical and Chemical Research, Hatoyama, Saitama, 350-0395, Japan

    Rafal Dunin-Borkowski & Takeshi Kasama

Authors
  1. Andrew S. W. Wong
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  2. Ghim W. Ho
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  3. Rafal Dunin-Borkowski
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  4. Takeshi Kasama
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  5. Rachel A. Oliver
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  6. Pedro M.F.J. Costa
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  7. Colin J. Humphreys
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Correspondence to Andrew S. W. Wong.

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Wong, A.S.W., Ho, G.W., Dunin-Borkowski, R. et al. The mean inner potential of GaN measured from nanowires using off-axis electron holography. MRS Online Proceedings Library 892, 1102 (2005). https://doi.org/10.1557/PROC-0892-FF11-02

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