Single-Nanocrystal Spectroscopy of White-Light-Emitting CdSe Nanocrystals

被引：43

作者：

Dukes, Albert D., III ^{[1
]}

Samson, Philip C. ^{[2
,4
]}

Keene, Joseph D. ^{[1
,3
]}

Davis, Lloyd M. ^{[2
]}

Wikswo, John P. ^{[2
,4
,7
,8
,9
]}

Rosenthal, Sandra J. ^{[1
,2
,4
,5
,6
,9
,10
]}

机构：

[1] Vanderbilt Univ, Dept Chem, Nashville, TN 37235 USA

[2] Vanderbilt Univ, Vanderbilt Inst Integrat Biosyst Res & Educ, Nashville, TN 37235 USA

[3] Univ Tennessee, Inst Space, Ctr Laser Applicat, Tullahoma, TN 37388 USA

[4] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[5] Vanderbilt Univ, Dept Pharmacol, Nashville, TN 37235 USA

[6] Vanderbilt Univ, Dept Chem & Biomol Engn, Nashville, TN 37235 USA

[7] Vanderbilt Univ, Dept Biomed Engn, Nashville, TN 37235 USA

[8] Vanderbilt Univ, Dept Mol Physiol & Biophys, Nashville, TN 37235 USA

[9] Vanderbilt Univ, Vanderbilt Inst Nanoscale Sci & Engn, Nashville, TN 37235 USA

[10] Oak Ridge Natl Lab, Joint Fac Oak Ridge Natl Lab, Oak Ridge, TN USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2011年 / 115卷 / 16期

基金：

美国国家科学基金会;

关键词：

CADMIUM SELENIDE NANOCRYSTALS; SEMICONDUCTOR QUANTUM DOTS; FLUORESCENCE INTERMITTENCY; EMISSION; GROWTH;

D O I：

10.1021/jp1109509

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the observation of broad-spectrum fluorescence from single CdSe nanocrystals. Individual semiconductor nanocrystals typically have a narrower emission spectrum than that of an ensemble. However, our experiments show that the ensemble white-light emission observed in ultrasmall CdSe nanocrystals is the result of many single CdSe nanocrystals, each emitting over the entire visible spectrum. These results indicate that each white-light-emitting CdSe nanocrystal contains all the trap states that give rise to the observed white-light emission.

引用

页码：4076 / 4081

页数：6

共 20 条

[1] Structure and Ultrafast Dynamics of White-Light-Emitting CdSe Nanocrystals [J].

Bowers, Michael J., II ;

McBride, James R. ;

Garrett, Maria D. ;

Sammons, Jessica A. ;

Dukes, Albert D., III ;

Schreuder, Michael A. ;

Watt, Tony L. ;

Lupini, Andrew R. ;

Pennycook, Stephen J. ;

Rosenthal, Sandra J. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (16) :5730-+

[2] White-light emission from magic-sized cadmium selenide nanocrystals [J].

Bowers, MJ ;

McBride, JR ;

Rosenthal, SJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (44) :15378-15379

[3] Pinned emission from ultrasmall cadmium selenide nanocrystals [J].

Dukes, Albert D., III ;

Schreuder, Michael A. ;

Sammons, Jessica A. ;

McBride, James R. ;

Smith, Nathanael J. ;

Rosenthal, Sandra J. .

JOURNAL OF CHEMICAL PHYSICS, 2008, 129 (12)

[4] White Light Emission Characteristics of Polymer-Encapsulated CdSe Nanocrystal Films [J].

Gosnell, Jonathan D. ;

Rosenthal, Sandra J. ;

Weiss, Sharon M. .

IEEE PHOTONICS TECHNOLOGY LETTERS, 2010, 22 (08) :541-543

[5] White-light-emitting CdSe quantum dots synthesized at room temperature [J].

Jose, Rajan ;

Zhelev, Zhivko ;

Bakalova, Rumiana ;

Baba, Yoshinobu ;

Ishikawa, Mitsuru .

APPLIED PHYSICS LETTERS, 2006, 89 (01)

[6] Bright Future for Fluorescence Blinking in Semiconductor Nanocrystals [J].

Krauss, Todd D. ;

Peterson, Jeffrey J. .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2010, 1 (09) :1377-1382

[7] Sequential growth of magic-size CdSe nanocrystals [J].

Kudera, Stefan ;

Zanella, Marco ;

Giannini, Cinzia ;

Rizzo, Aurora ;

Li, Yanqin ;

Gigli, Giuseppe ;

Cingolani, Roberto ;

Ciccarella, Giuseppe ;

Spahl, Werner ;

Parak, Wolfgang J. ;

Manna, Liberato .

ADVANCED MATERIALS, 2007, 19 (04) :548-+

[8] On/"off" fluorescence intermittency of single semiconductor quantum dots [J].

Kuno, M ;

Fromm, DP ;

Hamann, HF ;

Gallagher, A ;

Nesbitt, DJ .

JOURNAL OF CHEMICAL PHYSICS, 2001, 115 (02) :1028-1040

[9] On ultrasmall nanocrystals [J].

McBride, James R. ;

Dukes, Albert D., III ;

Schreuder, Michael A. ;

Rosenthal, Sandra J. .

CHEMICAL PHYSICS LETTERS, 2010, 498 (1-3) :1-9

[10] Correlation between fluorescence intermittency and spectral diffusion in single semiconductor quantum dots [J].

Neuhauser, RG ;

Shimizu, KT ;

Woo, WK ;

Empedocles, SA ;

Bawendi, MG .

PHYSICAL REVIEW LETTERS, 2000, 85 (15) :3301-3304

← 1 2 →