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Growth and structure analysis of tungsten oxide nanorods using environmental TEM

Tomoharu Tokunaga1*, Tadashi Kawamoto1, Kenta Tanaka1, Naohiro Nakamura1, Yasuhiko Hayashi2, Katsuhiro Sasaki1, Kotaro Kuroda1 and Takahisa Yamamoto1

Author Affiliations

1 Department of Quantum Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603, Japan

2 Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan

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Nanoscale Research Letters 2012, 7:85  doi:10.1186/1556-276X-7-85

Published: 25 January 2012


WO3 nanorods targeted for applications in electric devices were grown from a tungsten wire heated in an oxygen atmosphere inside an environmental transmission electron microscope, which allowed the growth process to be observed to reveal the growth mechanism of the WO3 nanorods. The initial growth of the nanorods did not consist of tungsten oxide but rather crystal tungsten. The formed crystal tungsten nanorods were then oxidized, resulting in the formation of the tungsten oxide nanorods. Furthermore, it is expected that the nanorods grew through cracks in the natural surface oxide layer on the tungsten wire.

tungsten; oxide; nanorod; environmental TEM