Up- and down-conversion cubic zirconia and hafnia nanobelts

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Changlong Jiang
  • Feng Wang
  • Nianqiang Wu
  • Xiaogang Liu

Detail(s)

Original languageEnglish
Pages (from-to)4826-4829
Journal / PublicationAdvanced Materials
Volume20
Issue number24
Publication statusPublished - 17 Dec 2008
Externally publishedYes

Abstract

A direct and scalable approach, based upon a thermal decomposition method under normal atmospheric pressure was introduced, for growing well-defined single-crystalline cubic ZrO2 and HfO2 nanobelts with controllable structural compositions and novel optical properties. A solution of ZrCl4 and YCl3.6H2O in ethanol was first treated with sodium hydroxide to yield a viscous gel mixture. The mixture was transferred into a 15 mL Teflon-lined autoclave and heated at 140°C for 24h. The as-synthesized ZrO2 precursors are composed of Zr(OH) 4 as characterized by Fourier transform IR and thermal analysis. XRD patterns of the YSZ samples obtained with less Y3+ content show a mixture of monoclinic, tetragonal, and cubic phases. The down-conversion emission spectrum that is independent of dopant ions show a peak centered at 470nm, corresponding to band gap emission of the host.

Citation Format(s)

Up- and down-conversion cubic zirconia and hafnia nanobelts. / Jiang, Changlong; Wang, Feng; Wu, Nianqiang et al.
In: Advanced Materials, Vol. 20, No. 24, 17.12.2008, p. 4826-4829.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review