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Title: Phase selection enabled formation of abrupt axial heterojunctions in branched oxide nanowires
Authors: Gao, Jing
Turner, Stuart
Li, Yongfeng
Lu, Yun Hao
Feng, Yuan Ping
Boullay, Philippe
Prellier, Wilfrid
Tendeloo, Gustaaf van
Wu, Tom
Lebedev, Oleg I.
Issue Date: 2011
Source: Gao, J., Lebedev, O. I., Turner, S., Li, Y. F., Lu, Y. H., Feng, Y. P., et al. (2012). Phase Selection Enabled Formation of Abrupt Axial Heterojunctions in Branched Oxide Nanowires. Nano Letters, 12(1), 275-280.
Series/Report no.: Nano letters
Abstract: Rational synthesis of nanowires via the vapor–liquid–solid (VLS) mechanism with compositional and structural controls is vitally important for fabricating functional nanodevices from bottom up. Here, we show that branched indium tin oxide nanowires can be in situ seeded in vapor transport growth using tailored Au–Cu alloys as catalyst. Furthermore, we demonstrate that VLS synthesis gives unprecedented freedom to navigate the ternary In–Sn–O phase diagram, and a rare and bulk-unstable cubic phase can be selectively stabilized in nanowires. The stabilized cubic fluorite phase possesses an unusual almost equimolar concentration of In and Sn, forming a defect-free epitaxial interface with the conventional bixbyite phase of tin-doped indium oxide that is the most employed transparent conducting oxide. This rational methodology of selecting phases and making abrupt axial heterojunctions in nanowires presents advantages over the conventional synthesis routes, promising novel composition-modulated nanomaterials.
ISSN: 1530-6984
DOI: 10.1021/nl2035089
Rights: © 2011 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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