標題: Rayleigh scattering correlation spectroscopy on diffusion dynamics of nanoparticles under intense laser irradiation
作者: Hee, Ping-Yu
Uwada, Takayuki
Okano, Kazunori
Miura, Atsushi
Masuhara, Hiroshi
應用化學系
Department of Applied Chemistry
關鍵字: Rayleigh scattering;correlation spectroscopy;gold nanoparticles;photothermal heating;laser trapping
公開日期: 2013
摘要: 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.
URI: http://hdl.handle.net/11536/23359
http://dx.doi.org/10.1117/12.2023022
ISBN: 978-0-8194-9660-7
ISSN: 0277-786X
DOI: 10.1117/12.2023022
期刊: OPTICAL TRAPPING AND OPTICAL MICROMANIPULATION X
Volume: 8810
Appears in Collections:Conferences Paper


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