Enhanced luminescence of silver nanoclusters in mesoporous film

被引：6

作者：

Aiboushev, A. V. ^{[2
]}

Astafiev, A. A. ^{[2
]}

Lozovik, Yu. E. ^{[1
]}

Merkulova, S. P. ^{[1
]}

Nadtochenko, V. A. ^{[2
]}

Sarkisov, O. M. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia

[2] Russian Acad Sci, Inst Chem Phys, Moscow, Russia

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 31期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/j.physleta.2008.05.083

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：5193 / 5197

页数：5

共 23 条

[1]

AIBOUSHEV A, 2007, P SPIE, V6727

[2]

Andrews D., 2007, FRONTIERS SURFACE NA

[3] PHOTOLUMINESCENCE OF NOBLE-METALS [J].

APELL, P ;

MONREAL, R ;

LUNDQVIST, S .

PHYSICA SCRIPTA, 1988, 38 (02) :174-179

[4] Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies [J].

Bach, U ;

Lupo, D ;

Comte, P ;

Moser, JE ;

Weissörtel, F ;

Salbeck, J ;

Spreitzer, H ;

Grätzel, M .

NATURE, 1998, 395 (6702) :583-585

[5] OPTICAL-ABSORPTION IN SMALL METAL PARTICLES [J].

BARMA, M ;

SUBRAHMANYAM, V .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (41) :7681-7688

[6]

Brongersma ML, 2007, SPRINGER SER OPT SCI, V131, P1, DOI 10.1007/978-1-4020-4333-8

[7] Preparation of highly uniform Ag/TiO2 and Au/TiO2 supported nanoparticle catalysts by photodeposition [J].

Chan, SC ;

Barteau, MA .

LANGMUIR, 2005, 21 (12) :5588-5595

[8] THE PHYSICS OF SIMPLE METAL-CLUSTERS - EXPERIMENTAL ASPECTS AND SIMPLE-MODELS [J].

DEHEER, WA .

REVIEWS OF MODERN PHYSICS, 1993, 65 (03) :611-676

[9] Photochromism and two-photon luminescence of Ag-TiO2 granular composite films activated by near infrared ps/fs pulses [J].

Gong, H. M. ;

Xiao, S. ;

Su, X. R. ;

Han, J. B. ;

Wang, Q. Q. .

OPTICS EXPRESS, 2007, 15 (21) :13924-13929

[10] Multiphoton excitation of fluorescence near metallic particles: Enhanced and localized excitation [J].

Gryczynski, I ;

Malicka, J ;

Shen, YB ;

Gryczynski, Z ;

Lakowicz, JR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (09) :2191-2195

← 1 2 3 →