Self-formation of GaN hollow nanocolumns by inductively coupled plasma etching

S. C. Hung, Y. K. Su, S. J. Chang, S. C. Chen, L. W. Ji, T. H. Fang, L. W. Tu, M. Chen

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Abstract

GaN hollow nanocolumns were formed by inductively coupled plasma etching. It was found that the tops of the GaN nanocolumns were hexagonal with the c axis perpendicular to the substrate surface. It was also found that the density of the GaN nanocolumns depends strongly on etching parameters, which suggests that the formation of these GaN nanocolumns was not related to the dislocation density in the original GaN epitaxial layers. With an Ar concentration of 42.86%, it was found that the diameter of the whole nanocolumns was around 80 nm and the diameter of the nanocavities inside these nanocolumns was around 40 nm, while the density of the nanocolumns was around 4.4×109cm -2.

Original languageEnglish
Pages (from-to)1607-1610
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number8
DOIs
Publication statusPublished - 2005 May 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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