Ethanol-Promoted Fabrication of Tungsten Oxide Nanobelts with Defined Crystal Orientation

Author(s)

Suphaporn Daothong, Naratip Songmee, Nuchjira Dejang, Thomas Pichler, Hidetsugu Shiozawa, Yan Jia, David Batchelor, Esko Kauppinen, Somchai Thongtem, Paola Ayala, Pisith Singjai

Abstract

A controlled method for the production of tungsten oxide nanobelts through metal oxidation in presence of ethanol is proposed. At the optimal synthesis conditions, up to 20 mu m long vertically aligned ribbon-like structures with a narrow rectangular cross section can be obtained in a tuned manner with preferential formation of WO2 in the presence of graphitic like carbon. Bulk and local-scale studies suggest that carbon diffusion to the surface of the material leads to the formation of mainly WO3 nanobelts from simple annealing treatments at 450 degrees C. This represents one alternative method to the common tungsten oxidation in air, opening the possibility to use C-containing compounds with negligible formation of carbide traces. An in-depth characterization of these materials has been performed, and the possible growth mechanisms are here discussed.

Organisation(s)

Electronic Properties of Materials

External organisation(s)

Chiang Mai University, University of Surrey, Northeast Normal University - China, BESSY GmbH, Aalto University

Journal

The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)

Volume

114

Pages

10-14

No. of pages

5

ISSN

1932-7447

DOI

https://doi.org/10.1021/jp9085975

Publication date

2010

Peer reviewed

Yes

Austrian Fields of Science 2012

103018 Materials physics

Portal url

https://ucris.univie.ac.at/portal/en/publications/ethanolpromoted-fabrication-of-tungsten-oxide-nanobelts-with-defined-crystal-orientation(21cf7ffa-6b5e-4d6c-a91b-cb969e37241a).html