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Sandra Gibson and Ray LaPierre Study of radial growth in patterned self-catalyzed GaAs nanowire arrays by gas source molecular beam epitaxy physica status solidi (RRL) - Rapid Research Letters 7

Version of Record online: 2 MAY 2013 | DOI: 10.1002/pssr.201307142

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Part of Focus Issue on “Semiconductor Nanowires” (Eds.: Chennupati Jagadish, Lutz Geelhaar, Silvija Gradecak)

Periodic arrays of self-catalyzed GaAs nanowires are grown by gas-source MBE on nano-patterned oxidized Si substrates. The average nanowire length and diameter increase significantly with both time and increasing inter-wire spacing as revealed by growth of different duration under identical conditions. A mechanism for the radial and axial growth is proposed in this Letter, which accounts for the observed dependence on the pattern parameters.

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