Enhanced luminescence of silver nanoclusters in mesoporous film |
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| Authors: | AV Aiboushev YuE Lozovik SP Merkulova OM Sarkisov |
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| Institution: | a Institute of Chemical Physics RAS, Kosigina st. 4, Moscow, Russia
b Institute of Spectroscopy RAS, 142190 Troitsk, Moscow region, Russia |
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| Abstract: | Luminescence of silver nanoparticles photodeposited on titan dioxide nanoparticles of mesoporous film is studied. Luminescence was registered under the two-photon excitation by femtosecond laser pulses of Ti:sapphire laser. It occurs that Ag/TiO2 mesoporous films have high concentration of bright luminescence spots which reveal stability to degradation under long illumination. Various configurations of silver nanoparticles are analyzed to explain the physics of bright luminescence spots (“hot spots”). Luminescence intensity reveals “hot spots” dependence on excitation laser pulse polarization. Properties of Ag/TiO2 system show its promising usage for single molecule spectroscopy and biological objects visualization. |
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