"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Influence of annealing temperature on the structure and optical properties of TiO2 nanoparticles

S. RAMEZANISANI1,* , A. MORTEZAALI1

Affiliation

  1. Laboratory of surface physics and thin film, Department of physics, Alzahra University, Tehran 19938, Iran

Abstract

The effect of annealing temperature on structure and optical properties of TiO2 nanoparticles prepared by thermal evaporation was investigated. Nanoparticles were annealed with O2 for 2h at different temperatures from 3000C-900 0C. The optical constants were deduced by using effective medium approximation (EMA). Polycrystalline nanoparticles with rutile crystal structure, as evidenced from X-ray diffraction pattern, were obtained with major refraction along (110).Refractive index decreases with decreasing annealed temperature. The direct energy band gap increases with decreasing annealed temperature and decreasing grains size..

Keywords

Optical properties, TiO2 nanoparticles, Effective medium approximation, Annealed temperature.

Submitted at: Dec. 10, 2010
Accepted at: Feb. 17, 2011

Citation

S. RAMEZANISANI, A. MORTEZAALI, Influence of annealing temperature on the structure and optical properties of TiO2 nanoparticles, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 2, pp. 126-129 (2011)