Paper Title:
Photoluminescence of Laser-Synthesized Anatase Titanium Dioxide Nanopowders
  Abstract

Titanium dioxide (TiO2) nanopowders were prepared by laser-induced pyrolysis. Raman scattering showed that prepared TiO2 nanocrystals have anatase TiO2 structure. Specific surface area of the powders varies from 84 to 110 m2/g, while the grain size of nanoparticles is between 30 and 70 nm, depending on preparation conditions. We measured photoluminescence (PL) spectra of TiO2 nanocrystals. Under laser irradiation with photon energy between 2.41 and 2.71 eV the TiO2 nanocrystals displayed strong visible light emission, even at excitation power as low as 0.05 W/cm2. The line shape and position of this broad luminescence band vary with excitation energy. As PL spectra of anatase TiO2 can be attributed to three kinds of physical origins (self-trapped excitons, surface states and oxygen vacancies) in this paper we try to resolve which of them are dominant for different TiO2 nanopowders of different grain size.

  Info
Periodical
Edited by
Dragan P. Uskokovic, Slobodan K. Milonjic, Djan I. Rakovic
Pages
265-270
DOI
10.4028/www.scientific.net/MSF.494.265
Citation
M. Šćepanović, Z. Dohčević-Mitrović, I. Hinić, M. Grujić-Brojčin, G. Stanišić, Z. V. Popović, "Photoluminescence of Laser-Synthesized Anatase Titanium Dioxide Nanopowders", Materials Science Forum, Vol. 494, pp. 265-270, 2005
Online since
September 2005
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Gaurav Shukla, Alika K. Khare
Abstract:TiO2 is a widely studied material for many important applications in areas such as environmental purification, photocatalyst, gas sensors,...
65
Authors: Walter Kenji Yoshito, Nildemar A.M. Ferreira, Ana Carolina S. Coutinho Rumbao, Dolores Ribeiro Ricci Lazar, Valter Ussui
Abstract:Titania ceramics have many applications due to its surface properties and, recently, its nanostructured compounds, prepared by hydrothermal...
788
Authors: Mohammad Reza Golobostanfard, Reza Ebrahimifard, Hossein Abdizadeh
Abstract:TiO2/ZnO Nanocomposite powders with different Zn/Ti ratios were synthesized via sol-gel method. The as prepared and calcined Titania...
993
Authors: Leonardo González-Reyes, I. Hernández-Pérez, Lucia Díaz-Barriga Arceo, Arturo Manzo-Robledo
Abstract:Nanocristalline TiO2 obtained by a facile and environment-friendly sonochemical method was subjected to thermal treatment in the...
105
Authors: Anna Iwulska, G. Sliwinski
Abstract:The titanium dioxide target (99.7%) of 1 cm in dia was ablated in vacuum by laser pulses (6 ns) at 266 nm and at repetition rate of 10 Hz....
89