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Growth and Optical Properties of Self-Organized Au2Si Nanospheres Pea-Podded in a Silicon Oxide Nanowire

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Abstract

Silicon-based nanowires with embedded self-assembled chains of gold silicide nanospheres (Au2Si@SiONW) have been prepared by annealing Si/Au bilayers. The diameter, number density, and length of the wires can be controlled by adjusting the bilayer thickness. The composite material displayed a new sharp photoluminescence peak thought to result from inter-band transitions in the “pea-podded” (see Figure) gold silicide crystals.

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