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Proceedings Paper

Observation of time-dependent single-particle light scattering from gold nanorods and nanospheres by using unpolarized dark-field microscopy
Author(s): Vladimir A. Bogatyrev; Lev A. Dykman; Anna V. Alekseeva; Boris N. Khlebtsov; Anna P. Novikova; Nikolai G. Khlebtsov
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Paper Abstract

We report on the time-dependent light scattering from single gold nanospheres (diameter about 90 nm) and nanorods (15x25 nm). Unlike the recent report by S&diaero;nnichsen and Alivisatos (Nano Lett. 5, 301-304, 2005), we observed the dynamic modulation of scattering intensity by using unpolarized dark field microscopy equipped with a digital camera. The changes in light scattering intensity from gold nanorods were caused by 3-dimensional rotational diffusion by contrast to 2-dimensional polarized-scattering modulation observed previously. In the case of 90-nm gold nanospheres, the light scattering modulation was related to the translational diffusion only. By using T-matrix method and Rayleigh approximation, we describe the time-dependent variations in light scattering intensity caused by rotation of nanorods at several scattering and orientation geometry. Finally, we present preliminary data on real-time visualization of active interaction between the living rat peritoneal macrophages and gold nanorods.

Paper Details

Date Published: 7 July 2006
PDF: 10 pages
Proc. SPIE 6164, Saratov Fall Meeting 2005: Coherent Optics of Ordered and Random Media VI, 616401 (7 July 2006); doi: 10.1117/12.695001
Show Author Affiliations
Vladimir A. Bogatyrev, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Saratov State Univ. (Russia)
Lev A. Dykman, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Anna V. Alekseeva, Saratov State Univ. (Russia)
Boris N. Khlebtsov, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Anna P. Novikova, Saratov State Univ. (Russia)
Nikolai G. Khlebtsov, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Saratov State Univ. (Russia)


Published in SPIE Proceedings Vol. 6164:
Saratov Fall Meeting 2005: Coherent Optics of Ordered and Random Media VI
Dmitry A. Zimnyakov; Nikolai G. Khlebtsov, Editor(s)

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