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Conversion of a Bi Nanowire Array to an Array of Bi–Bi 2 O 3 Core–Shell Nanowires and Bi 2 O 3 Nanotubes
Author(s) -
Li Liang,
Yang YouWen,
Li GuangHai,
Zhang LiDe
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200500382
Subject(s) - nanowire , materials science , nanotechnology , shell (structure) , core (optical fiber) , optoelectronics , composite material
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–Bi 2 O 3 core–shell nanowires via a multistep, slow oxidation method, and then controlling their further conversion to a single‐crystalline Bi 2 O 3 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.