Modifications in structural and electronic properties of TiO2 thin films using swift heavy ion irradiation

Title
Modifications in structural and electronic properties of TiO2 thin films using swift heavy ion irradiation
Authors
H. ThakurRavi KumarP. ThakurN. B. BrookesK. K. SharmaA. P. SinghY. Kumar가우탐채근화
Keywords
Electronic structure; X-ray absorption spectroscopy; swift heavy ion irradiation
Issue Date
2011-10
Publisher
Journal of applied physics
Citation
VOL 110, NO 8, 083718-1-083718-5
Abstract
We report on the structural and electronic properties of swift heavy ion (SHI) irradiated pristine TiO2 thin films, deposited by radio frequency magnetron sputtering on sapphire substrates. The high resolution x-ray diffraction and Raman measurements show a structural phase transition from anatase to admixture of brookite and rutile phases of TiO2 with increasing SHI fluence followed by a significant distortion in the TiO6 octahedra. The modification in the electronic structure stimulated by SHI irradiation has been investigated using x-ray absorption (XAS) experiments at the O K and Ti L3,2 absorption edges. The O K edge spectra clearly indicate the splitting of the pre-edge spectral features having t2g and eg symmetry bands due to structural disorder/distortion induced by irradiation. The intensity of the SHI generated components at the O K edge increases monotonically, which can be correlated to the modification in unoccupancies associated with O 2 p orbitals hybridized with Ti 3 d states. The XAS spectra at the Ti L3,2 edge further authenticate that SHI creates a controlled structural disorder/distortion in the TiO6 octahedra.
URI
http://pubs.kist.re.kr/handle/201004/40800
ISSN
0021-8979
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE