Steering epitaxial alignment of Au, Pd, and AuPd nanowire arrays by atom flux change

Title
Steering epitaxial alignment of Au, Pd, and AuPd nanowire arrays by atom flux change
Authors
유영동서관용한솔Kumar Varadwaj김현유류지훈이혁모안재평Hyotcherl Ihee김봉수
Keywords
Gold; epitaxial growth; seed crystal; palladium; nanowire
Issue Date
2010-02
Publisher
Nano letters
Citation
VOL 10, NO 2, 432-438
Abstract
We have synthesized epitaxial Au, Pd, and AuPd nanowire arrays in vertical or horizontal alignment on a c-cut sapphire substrate. We show that the vertical and horizontal nanowire arrays grow from half-octahedral seeds by the correlations of the geometry and orientation of seed crystals with those of as-grown nanowires. The alignment of nanowires can be steered by changing the atom flux. At low atom deposition flux vertical nanowires grow, while at high atom flux horizontal nanowires grow. Similar vertical/horizontal epitaxial growth is also demonstrated on SrTiO3 substrates. This orientation-steering mechanism is visualized by molecular dynamics simulations.
URI
http://pubs.kist.re.kr/handle/201004/37650
ISSN
1530-6984
Appears in Collections:
KIST Publication > Article
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