Paper Titles
Comparative Potentiodynamic Study of Nickel and Hydrogen Underpotential Deposition at Polycrystalline Platinum Electrode in Weak Acid and Neutral Solutions
p.241
Flowability of Electrolytic Copper Powder
p.247
Evidence of Dopant-Matrix Interaction in Optical Spectra of Rare Earth Ions
p.253
Crystal Chemistry Approach in Yb Doped Laser Materials
p.259
Photoluminescence of Laser-Synthesized Anatase Titanium Dioxide Nanopowders
p.265
Spin Interactions in Cd1-xMnxS Bulk Crystals
p.271
Optical and Magnetic Properties of Hg1-xMnxSe Alloys
p.277
The Influence of Surface Modification on Related Functional Properties of Wool and Hemp
p.283
Low Pressure RF Capacitively Coupled Plasma Reactor for Modification of Seeds, Polymers and Textile Fabrics
p.291

Photoluminescence of Laser-Synthesized Anatase Titanium Dioxide Nanopowders

Article Preview

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.

You might also be interested in these eBooks
Current Research in Advanced Materials and Processes View Preview

Info:

Periodical:

Materials Science Forum (Volume 494)

Pages:

265-270

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.494.265

Citation:

Cite this paper

Online since:

September 2005

Authors:

M. Šćepanović, Z. Dohčević-Mitrović, I. Hinić, M. Grujić-Brojčin, G. Stanišić, Zoran V. Popović

Keywords:

Anatase Titanium Dioxide, Nanopowder, Photoluminescence (PL)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2005 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] W. F. Zhang, M. S. Zhang, Z. Yin, Q. Chen: Appl. Phys. B Vol. 70 (2000), p.261.

Google Scholar

[2] H. Tang, et al.: Solid State Commun. Vol. 87 (1993), p.847.

Google Scholar

[3] H. Tang, H. Berger, P. E. Schmid, and F. Levy: Solid State Commun. Vol. 92 (1994), p.267.

Google Scholar

[4] N. Hosaka, T. Sekiya, and S. Kurita: J. Lumin. Vol. 72-74 (1997), p.874.

Google Scholar

[5] T. Sekiya, S. Kamei, and S. Kurita: J. Lumin. Vol. 87-89 (2000), p.1140.

Google Scholar

[6] M. Watanabe, S. Sasaki, and T. Hayashi: J. Lumin. Vol. 87-89 (2000), p.1234.

Google Scholar

[7] M. Watanabe, T. Hayashi, S. Sasaki: Int. J. Mod. Phys. B Vol. 15 (2001), p.3997.

Google Scholar

[8] T. Sekiya, M. Tasaki, K. Wakabayashi, S. Kurita: J. Lumin. Vol. 108 (2004), p.69.

Google Scholar

[9] H. Tang, K. Prasad, R. Sanjines, P. E. Schmid, F. Levy: J. Appl. Phys. Vol. 75 (1994), p. (2042).

Google Scholar

[10] L. Forss, M. Schubnell: Appl. Phys. B Vol. 56 (1993) p.363.

Google Scholar

[11] I. Sildos, A. Suisalu, J. Aarik, T. Sekiya, S. Kurita: J. Lumin. Vol. 87-89 (2000), p.290.

DOI: 10.1016/s0022-2313(99)00318-x

Google Scholar

[12] F. Curcio, M. Musci, N. Notaro, and C. Nannetti, Appl. Surf. Sci. Vol. 36 (1989), p.52.

Google Scholar

[13] W. F. Zhang, et al.: J. Phys. D: Appl. Phys. Vol. 33 (2000), p.912.

Google Scholar