Fluorescence Enhancement, Blinking Suppression, and Gray States of Individual Semiconductor Nanocrystals Close to Gold Nanoparticles

被引：111

作者：

Ma, Xuedan ^{[1
]}

Tan, Hua ^{[1
]}

Kipp, Tobias ^{[1
]}

Mews, Alf ^{[1
]}

机构：

[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

NANO LETTERS | 2010年 / 10卷 / 10期

关键词：

CdSe nanocrystals; gold nanoparticles; silica coating; photoluminescence; blinking suppression; CDSE QUANTUM DOTS; EMISSION; INTERMITTENCY; PHOTOLUMINESCENCE; FLUCTUATIONS; LUMINESCENCE; MONOLAYERS; BEHAVIOR; CELLS;

D O I：

10.1021/nl102451c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The optical properties of nanocrystals arc drastically changed by the interaction with adjacent metal nanoparticules By time-resolved photoluminescence spectroscopy. we investigate CdSe multishell nanocrystals coupled to self-assembled films of Au nanoparticles The distance between emitter and metal is adjusted by coating the nanocrystals with silica shells These NCs showed increased fluorescence intensity, a decreased fluorescence lifetime, strong blinking suppression, and fluorescence from gray states These observations can be explained by the metal particle induced change of excitation and recombination rates

引用

页码：4166 / 4174

页数：9

共 53 条

[1] Optical Antennas [J].

Bharadwaj, Palash ;

Deutsch, Bradley ;

Novotny, Lukas .

ADVANCES IN OPTICS AND PHOTONICS, 2009, 1 (03) :438-483

[2] Radiative and nonradiative rate fluctuations of single colloidal semiconductor nanocrystals [J].

Biebricher, A ;

Sauer, M ;

Tinnefeld, P .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (11) :5174-5178

[3] Measurement of the radiative and nonradiative decay rates of single CdSe nanocrystals through a controlled modification of their spontaneous emission [J].

Brokmann, X ;

Coolen, L ;

Dahan, M ;

Hermier, JP .

PHYSICAL REVIEW LETTERS, 2004, 93 (10) :107403-1

[4] Tunable emission based on the composite of Au nanoparticles and CdSe quantum dots deposited on elastomeric film [J].

Chen, C. W. ;

Wang, C. H. ;

Wei, C. M. ;

Chen, Y. F. .

APPLIED PHYSICS LETTERS, 2009, 94 (07)

[5] Excitation enhancement of CdSe quantum dots by single metal nanoparticles [J].

Chen, Yeechi ;

Munechika, Keiko ;

Jen-La Plante, Ilan ;

Munro, Andrea M. ;

Skrabalak, Sara E. ;

Xia, Younan ;

Ginger, David S. .

APPLIED PHYSICS LETTERS, 2008, 93 (05)

[6] Giant multishell CdSe nanocrystal quantum dots with suppressed blinking [J].

Chen, Yongfen ;

Vela, Javier ;

Htoon, Han ;

Casson, Joanna L. ;

Werder, Donald J. ;

Bussian, David A. ;

Klimov, Victor I. ;

Hollingsworth, Jennifer A. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (15) :5026-5027

[7] Direct observation of confined acoustic phonons in the photoluminescence spectra of a single CdSe-CdS-ZnS core-shell-shell nanocrystal [J].

Chilla, Gerwin ;

Kipp, Tobias ;

Menke, Torben ;

Heitmann, Detlef ;

Nikolic, Marija ;

Froemsdorf, Andreas ;

Kornowski, Andreas ;

Foerster, Stephan ;

Weller, Horst .

PHYSICAL REVIEW LETTERS, 2008, 100 (05)

[8] Systematic computational study of the effect of silver nanoparticle dimers on the coupled emission from nearby fluorophores [J].

Chowdhury, Mustafa H. ;

Pond, James ;

Gray, Stephen K. ;

Lakowicz, Joseph R. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (30) :11236-11249

[9] Electroluminescence from single monolayers of nanocrystals in molecular organic devices [J].

Coe, S ;

Woo, WK ;

Bawendi, M ;

Bulovic, V .

NATURE, 2002, 420 (6917) :800-803

[10] Facts and Artifacts in the Blinking Statistics of Semiconductor Nanocrystals [J].

Crouch, Catherine H. ;

Sauter, Orion ;

Wu, Xiaohua ;

Purcell, Robert ;

Querner, Claudia ;

Drndic, Marija ;

Pelton, Matthew .

NANO LETTERS, 2010, 10 (05) :1692-1698

← 1 2 3 4 5 6 →