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Proceedings Paper

Rayleigh scattering correlation spectroscopy on diffusion dynamics of nanoparticles under intense laser irradiation
Author(s): Ping-Yu Hee; Takayuki Uwada; Kazunori Okano; Atsushi Miura; Hiroshi Masuhara
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Paper Abstract

Rayleigh scattering correlation microspectroscopy is developed and applied to study diffusion dynamics of some nanospheres in water. It was clearly found that the diffusion constant of gold nanoparticles decreased with increasing excitation laser power at the excitation wavelength of higher absorption cross section. This behavior was explained in terms of a coupling between laser trapping by the scattering excitation laser itself and laser heating of the particle. In the case of non-absorbing nanospheres such as silica and polystyrene, the excitation power dependence can be ascribed only to the laser trapping. Experimental setup is introduced, theoretical formulation is described, and future development of this measurement is considered.

Paper Details

Date Published: 12 September 2013
PDF: 12 pages
Proc. SPIE 8810, Optical Trapping and Optical Micromanipulation X, 88102T (12 September 2013); doi: 10.1117/12.2023022
Show Author Affiliations
Ping-Yu Hee, National Chiao Tung Univ. (Taiwan)
Takayuki Uwada, Josai Univ. (Japan)
Kazunori Okano, National Chiao Tung Univ. (Taiwan)
Atsushi Miura, National Chiao Tung Univ. (Taiwan)
Hiroshi Masuhara, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8810:
Optical Trapping and Optical Micromanipulation X
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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