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Tungsten Oxide Nanorods Array and Nanobundle Prepared by Using Chemical Vapor Deposition Technique

XP Wang, BQ Yang, HX Zhang and PX Feng*

Author Affiliations

Department of Physics, University of Puerto Rico, P.O. Box 23343, San Juan, PR, 00931, USA

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Nanoscale Research Letters 2007, 2:405-409  doi:10.1007/s11671-007-9075-3

Published: 7 July 2007


Tungsten oxide (WO3) nanorods array prepared using chemical vapor deposition techniques was studied. The influence of oxygen gas concentration on the nanoscale tungsten oxide structure was observed; it was responsible for the stoichiometric and morphology variation from nanoscale particle to nanorods array. Experimental results also indicated that the deposition temperature was highly related to the morphology; the chemical structure, however, was stable. The evolution of the crystalline structure and surface morphology was analyzed by scanning electron microscopy, Raman spectra and X-ray diffraction approaches. The stoichiometric variation was indicated by energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy.

Nanostructure; Tungsten oxide; Nanorod; Nanobundle; CVD