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Infrared spectroscopy of hydrated sulfate dianions
We report the first infrared spectra of multiply-charged anions in the gas phase. The spectra of SO42-" align="middle"/>·(H2O)n, with n=3–24, show four main bands assigned to two vibrations ...

Spectroscopic studies of fractal aggregates of silver nanospheres undergoing local restructuring

J. Chem. Phys. 125, 111101 (2006); doi:10.1063/1.2229202

Published 18 September 2006

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Sergei V. Karpov
L.V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russia

Valeriy S. Gerasimov and Ivan L. Isaev
Department of Physics and Engineering, Krasnoyarsk State Technical University, Krasnoyarsk 660028, Russia

Vadim A. Markel
Departments of Radiology and Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104
We present an experimental spectroscopic study of large random colloidal aggregates of silver nanoparticles undergoing local restructuring. We argue that such well-known phenomena as strong fluctuation of local electromagnetic fields, appearance of "hot spots" and enhancement of nonlinear optical responses depend on the local structure on the scales of several nanosphere diameters, rather than the large-scale fractal geometry of the sample. ©2006 American Institute of Physics
History: Received 6 January 2006; accepted 22 June 2006; published 18 September 2006
Permalink: http://link.aip.org/link/?JCPSA6/125/111101/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.70.Dd
    Colloids
  • 61.46.Df
    Nanoparticles
  • 61.43.Hv
    Fractals in disordered solids; macroscopic aggregates including diffusion-limited aggregates
  • 78.20.-e
    Optical properties of bulk materials and thin films
  • YEAR: 2006

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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