Synthesis of tungsten oxide tapered needles with nanotips

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Shiliang Wang
  • Yuehui He
  • Jin Zou
  • Peng Cao
  • Yao Jiang
  • Baiyun Huang
  • P. K. Liaw

Detail(s)

Original languageEnglish
Pages (from-to)574-579
Journal / PublicationJournal of Crystal Growth
Volume303
Issue number2
Publication statusPublished - 15 May 2007
Externally publishedYes

Abstract

Tungsten oxide tapered needles with nanotips were synthesized on a large scale by reacting tungsten nanopowders with hydrous nickel nitrate in hydrogen atmosphere. The resultant tungsten oxide needles have lengths more than 100 μm, root diameters of several hundred nanometers and tip diameters of several nanometers, showing a perfectly axisymmetric configuration. HRTEM and SAED analyses showed that the synthesized tungsten oxide tapered needles have a single-crystalline structure with growth direction of [0 1 0]. The effects of the experimental conditions (the ratio between tungsten and hydrous nickel nitrate, the size of tungsten powders, and the reaction atmosphere) on the morphology of the products were systematically investigated. It was found that tungsten oxide nanowires, submicro-/micro-whiskers and microtubules could be facilely obtained under different experimental conditions. The unique configuration and the single-crystal structure of the tapered needles may make them a potential candidate for field emitters and probing tips. © 2007 Elsevier B.V. All rights reserved.

Research Area(s)

  • A1. Crystal morphology, B1. Nanotips, B1. Oxides

Citation Format(s)

Synthesis of tungsten oxide tapered needles with nanotips. / Wang, Shiliang; He, Yuehui; Zou, Jin; Cao, Peng; Jiang, Yao; Huang, Baiyun; Liu, C. T.; Liaw, P. K.

In: Journal of Crystal Growth, Vol. 303, No. 2, 15.05.2007, p. 574-579.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review