Photon correlation spectroscopy and the luminescence of stabilized silver nanoparticles in heptane

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• 作者：M. G. Demidova ; A. I. Bulavchenko…
• 关键词：nanoparticles ; silver ; photon correlation spectroscopy ; luminescence
• 刊名：Russian Journal of Physical Chemistry A, Focus on Chemistry
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：89
• 期：4
• 页码：674-679
• 全文大小：441 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1531-863X

文摘

Dispersions of silver nanoparticles in heptane are investigated by means of photon correlation spectroscopy following the dilution of an electrophoretic concentrate obtained from AOT reverse micelle solution. The conditions for preparing stable dispersions with constant hydrodynamic radii of the particles (20 nm) and thicknesses of absorption layers (6 nm) are described. It is found that they luminesce (λmax = 300 nm) upon excitation with 230-70 nm radiation. The concentration dependence is valid for (0.4-.4) × 10? M Ag. The yield of luminescence quanta is 0.066. The lifetime of the excited state, estimated using the Stern-Volmer equation, is 10 ns.