Spectroscopic properties of hexagonal sodium tungstate nanorods
Authors: Publication Year: 2015


Sodium tungstate (Na-WO3) nanorods with typical diameters of 10-200 nm and lengths of several microns were prepared via hydrothermal synthesis. X-ray diffraction showed that the material crystallized in a hexagonal phase (space group
P6/mmm) with unit cell dimensions of a = 7.3166(8) Å and c = 3.8990(8) Å. The as-prepared Na-WO3 nanorods showed a distinctive visible-light-driven photochromism related to a proton-electron double injection process. The involved local
structural evolutions were monitored by Fourier transform infrared (FTIR) and Raman scattering spectroscopy. One diagnostic FTIR absorption at 585 cm-1 and one Raman band at 813 cm-1 were identified and assigned to the O-W-O stretching vibration. These two modes were strongly affected by the proton and electron insertion, showing promises for studying the chromogenic properties of hexagonal WO3 materials.

Additional Info

  • WP: Advanced materials technologies
  • Publication Year: 2015
  • Pages: Paper ID: 245
  • Name of proceedings: Proceedings of 15th International conference on nanotechnology (IEEE Nano 2015)
  • Name of conference: 15th International conference on nanotechnology (IEEE Nano 2015)
  • Town: Rome
  • Country: Italy
  • Date from: Monday, 27 July 2015
  • Date to: Thursday, 30 July 2015
  • Type: Report

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