Conversion of a Bi Nanowire Array to an Array of Bi–Bi2O3 Core–Shell Nanowires and Bi2O3 Nanotubes
- 1 March 2006
- Vol. 2 (4), 548-553
- https://doi.org/10.1002/smll.200500382
Abstract
A template-based heat-treatment method has been developed to convert metal nanowire arrays into arrays of metal–metal oxide core–shell nanowires and single-crystalline metal oxide nanotubes. This process is demonstrated by kinetically controlling the conversion of single-crystalline Bi nanowires to Bi–Bi2O3 core–shell nanowires via a multistep, slow oxidation method, and then controlling their further conversion to a single-crystalline Bi2O3 nanotube array via fast oxidation. This process can conveniently be extended to fabricate a free-standing, easily oxidized metal–metal oxide nanowire and metal oxide nanotube array, which may have future applications in nanoscale optics, electronics, and magnetics.Keywords
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