Enhancing fluorescence of quantum dots by silica-coated gold nanorods under one- and two-photon excitation

被引：67

作者：

Li, Xin ^{[1
,2
]}

Kao, Fu-Jen ^{[3
]}

Chuang, Chien-Chin ^{[3
]}

He, Sailing ^{[1
,2
]}

机构：

[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China

[2] Royal Inst Technol, Joint Res Ctr Photon, Stockholm, Sweden

[3] Natl Yang Ming Univ, Inst Biophoton, Taipei 11221, Taiwan

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 11期

关键词：

SINGLE-MOLECULE FLUORESCENCE; SPONTANEOUS EMISSION; RAMAN-SCATTERING; ENHANCEMENT; NANOPARTICLES; LUMINESCENCE; FLUOROPHORES; ABSORPTION; DEPENDENCE; RULERS;

D O I：

10.1364/OE.18.011335

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Nano-composites of quantum dots (QDs) and gold nanorods (GNRs) or silica-coated GNRs (GNRs_SiO2) were synthesized. The attached GNRs modify the excitation intensity and spontaneous emission of QDs through the surface plasmonic effects. The fluorescence from QDs is enhanced and can be optimized by modifying the thickness of silica coated on GNRs, under both one-and two-photon excitations. The measurements of fluorescence intensity and lifetime demonstrate that the enhancement may be attributed to the matching of the localized surface plasmon resonance of GNR to the excitation wavelength. In addition to enhancing QD-fluorescence in QD-GNR@SiO2, GNRs also present as an effective contrast agent for bio-imaging, through light scattering and or two-photon emission, as well as for photo-thermal therapy. The composite's multifunctional characteristics are highly valuable and to be exploited in bio-applications. (C) 2010 Optical Society of America

引用

页码：11335 / 11346

页数：12

共 50 条

[1] Enhancement and quenching of single-molecule fluorescence [J].

Anger, P ;

Bharadwaj, P ;

Novotny, L .

PHYSICAL REVIEW LETTERS, 2006, 96 (11)

[2]

[Anonymous], 1957, Light scattering by small particles

[3] Fluorescence Enhancement by Au Nanostructures: Nanoshells and Nanorods [J].

Bardhan, Rizia ;

Grady, Nathaniel K. ;

Cole, Joseph R. ;

Joshi, Amit ;

Halas, Naomi J. .

ACS NANO, 2009, 3 (03) :744-752

[4] Spectral dependence of single molecule fluorescence enhancement [J].

Bharadwaj, Palash ;

Novotny, Lukas .

OPTICS EXPRESS, 2007, 15 (21) :14266-14274

[5] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[6] Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].

Chan, WCW ;

Nie, SM .

SCIENCE, 1998, 281 (5385) :2016-2018

[7] DNA-gold nanorod conjugates for remote control of localized gene expression by near infrared irradiation [J].

Chen, CC ;

Lin, YP ;

Wang, CW ;

Tzeng, HC ;

Wu, CH ;

Chen, YC ;

Chen, CP ;

Chen, LC ;

Wu, YC .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (11) :3709-3715

[8] Dependence of fluorescence intensity on the spectral overlap between fluorophores and plasmon resonant single silver nanoparticles [J].

Chen, Yeechi ;

Munechika, Keiko ;

Ginger, David S. .

NANO LETTERS, 2007, 7 (03) :690-696

[9] 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)

[10] Polymeric Rulers: Distance-Dependent Emission Behaviors of Fluorophores on Flat Gold Surfaces and Bioassay Platforms Using Plasmonic Fluorescence Enhancement [J].

Chi, Young Shik ;

Byon, Hye Ryung ;

Lee, Bong Soo ;

Kong, Bokyung ;

Choi, Hee Cheul ;

Choi, Insung S. .

ADVANCED FUNCTIONAL MATERIALS, 2008, 18 (21) :3395-3402

← 1 2 3 4 5 →