Rayleigh scattering correlation spectroscopy on diffusion dynamics of nanoparticles under intense laser irradiation

Ping Yu Hee, Takayuki Uwada, Kazunori Okano, Atsushi Miura, Hiroshi Masuhara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationOptical Trapping and Optical Micromanipulation X
DOIs
StatePublished - 11 Dec 2013
EventOptical Trapping and Optical Micromanipulation X - San Diego, CA, United States
Duration: 25 Aug 201329 Aug 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8810
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Trapping and Optical Micromanipulation X
CountryUnited States
CitySan Diego, CA
Period25/08/1329/08/13

Keywords

  • correlation spectroscopy
  • gold nanoparticles
  • laser trapping
  • photothermal heating
  • Rayleigh scattering

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  • Cite this

    Hee, P. Y., Uwada, T., Okano, K., Miura, A., & Masuhara, H. (2013). Rayleigh scattering correlation spectroscopy on diffusion dynamics of nanoparticles under intense laser irradiation. In Optical Trapping and Optical Micromanipulation X [88102T] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8810). https://doi.org/10.1117/12.2023022