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Direct Electrodeposition of Highly Dense 50 nm Bi2Te3-ySey Nanowire Arrays

AuthorsMartín-González, Marisol; Snyder, G. Jeffrey; Prieto, Amy Lucia; Gronsky, Ronald; Sands, Timothy; Stacy, Angelica
Issue Date2003
PublisherAmerican Chemical Society
CitationNano Letters 3(7): 973-977 (2003)
AbstractFilms and arrays of 200 and 50 nm diameter wires of Bi2Te3-xSex have been electrodeposited in the following general reaction: 2Bi3+ + (3−y)HTeO2+ + (y)H2SeO3 + (9+y)H+ + 18e- → Bi2Te3-ySey + (6+y)H2O. Films produced from an electrolyte of 0.0075 M Bi, 0.0090 M Te, and 0.0010 M Se in 1 M HNO3 at a potential of 0 V vs Ag/AgCl are single phase with composition Bi2Te2.6Se0.4 as determined by X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Similar conditions yield arrays of 200 and 50 nm Bi2Te3-ySey wires when deposited into porous alumina templates. The wires are single phase, crystalline, and textured, with up to 85% pore filling.
Description5 páginas, 6 figuras.
Publisher version (URL)http://dx.doi.org/10.1021/nl034079s
Appears in Collections:(IMN-CNM) Artículos
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