Article

Modification of WO(3) thin films by MeV N(+)-ion beam irradiation.

Institute of Physics, Sachivalaya Marg, Bhubaneswar 751 005, India.
Journal of Physics Condensed Matter (impact factor: 2.55). 05/2007; 19(18):186204. DOI:10.1088/0953-8984/19/18/186204 pp.186204
Source: PubMed

ABSTRACT In this paper, we report on modification of the structural, optical, vibrational, and surface morphological properties of 2 MeV N(+)-ion irradiated WO(3) thin films at different fluences (up to 1 × 10(15) ions cm(-2)). Although we observe irradiation induced grain growth, no structural phase transition takes place in the WO(3) films. These are accompanied by a systematic reduction in the optical band gap of the films. These observations are corroborated by our independent micro-Raman and optical absorption spectroscopy studies. We have made an attempt to correlate these results with MeV ion-matter interaction.

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Keywords

different fluences
 
films
 
independent micro-Raman
 
irradiation induced grain growth
 
optical
 
optical absorption spectroscopy studies
 
optical band gap
 
structural phase transition
 
vibrational