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 |
顯示於類別: | 會議論文 |