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The formation of "hot spots" in mesoporous TiO2 films by photodeposited silver nanoparticles for use in nonlinear optical spectroscopy of isolated molecules

Zolotavin, P. N. and Petrukhin, A. N. and Permenova, E. P. and Sarkisov, O. M. and Nadtochenko , V. A. (2008) The formation of "hot spots" in mesoporous TiO2 films by photodeposited silver nanoparticles for use in nonlinear optical spectroscopy of isolated molecules. Nanotechnologies in Russia, Volume 3 (1-2). pp. 122-127.

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Official URL: http://www.springerlink.com/content/a414142372ku23...

Abstract

The excitation of silver photocatalytically deposited on the surface of TiO2 nanoparticles that formed a mesoporous film with femtosecond titanium-sapphire laser pulses caused two-photon luminescence of silver clusters. Luminescence was detected by scanning laser spectroscopy as “hot spots.” The system with silver on TiO2 had a high concentration of luminescing silver nanoparticles, which were fairly stable to degradation at long exposures. It was assumed that the high concentration of luminescing spots was caused by a high concentration of localized surface plasmons in the Ag/TiO2 system. The Ag/TiO2 system therefore offers promise for use in the spectroscopy of isolated molecules and visualization of biological objects.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Physical Science > Quantum phenomena
ID Code:2104
Deposited By:Prof. Alexey Ivanov
Deposited On:19 Dec 2008 13:15
Last Modified:01 Feb 2009 20:23

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