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Proceedings Paper

Relation between diffusion constant and particle density in TiO2 suspended solutions
Author(s): Chen Zhang; Xingyu Zhang; Qingpu Wang; Shuzhen Fan; Zhengping Wang; Ruijun Lan; Xiaoyi Bao
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Paper Abstract

We present time-resolved measurements of pulse transmission at wavelength 532 nm (60 ps pulse width, 10 Hz repetition rate) on samples of titanium powders suspended in methanol. The average particle diameter of the powders is 80 nm. We used a streak camera with 2 ps time revolution to record the transmitted signals. When the particle density is low, the results agreed with the diffusion theory and we obtained the time-independent diffusion constants. By adding the titanium powders gradually in methanol, we obtained the relationship between the diffusion constant and the particle density of TiO2 in the suspended solution. When using the TiO2 powders as the sample with a particle density of 1.36x1015 cm-3, the experimental result showed a little deviation from the diffusion theory, which may be the signature of localization in the random media.

Paper Details

Date Published: 24 February 2009
PDF: 6 pages
Proc. SPIE 7201, Laser Applications in Microelectronic and Optoelectronic Manufacturing VII, 72011H (24 February 2009); doi: 10.1117/12.811011
Show Author Affiliations
Chen Zhang, Shandong Univ. (China)
Xingyu Zhang, Shandong Univ. (China)
Qingpu Wang, Shandong Univ. (China)
Shuzhen Fan, Shandong Univ. (China)
Zhengping Wang, Shandong Univ. (China)
Ruijun Lan, Shandong Univ. (China)
Xiaoyi Bao, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 7201:
Laser Applications in Microelectronic and Optoelectronic Manufacturing VII
Michel Meunier; Andrew S. Holmes; Hiroyuki Niino; Bo Gu, Editor(s)

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