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Nano Lett. 2007 Aug;7(8):2535-9. Epub 2007 Jul 13.

Electrodeposited bismuth telluride nanowire arrays with uniform growth fronts.

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1
Department of Chemistry, University of California, Berkeley, California 94720, USA.

Abstract

Bismuth telluride (Bi2Te3) nanowires were deposited into porous alumina templates with 35 nm diameter pores by a pulsed-potential electrodeposition method. For growth at temperatures between 1 and 4 degrees C, the nanowires filled 93% of the pores of the template, and the growth fronts were uniform with nanowire lengths of approximately 62-68 microm. There are over ten billion nanowires per square centimeter with aspect ratios approaching 2000:1. Samples were characterized by scanning and transmission electron microscopy, X-ray diffraction, and electron microprobe analysis. The crystalline nanowire arrays are highly oriented in the [110] direction, which is optimal for thermoelectric applications.

PMID:
17629346
DOI:
10.1021/nl070711w
[Indexed for MEDLINE]

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