Ultrabright PbSe magic-sized clusters

被引：139

作者：

Evans, Christopher M. ^{[1
]}

Guo, Li ^{[1
]}

Peterson, Jeffrey J. ^{[1
]}

Maccagnano-Zacher, Sara ^{[2
]}

Krauss, Todd D. ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl801685a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present the synthesis and characterization of novel, ultrasmall PbSe magic-sized nanoclusters (MSCs). Unlike the syntheses of high-quality semiconductor nanoparticles, the MSC synthesis is straightforward, occurring at room temperature in air over several hours. MSCs have core diameters <2 nm and fluoresce in the near-infrared (900 nm) with remarkable quantum efficiencies consistently greater than 50%. The relatively slow growth of MSCs allows for a significant scale up of reaction volumes. Transfer to aqueous solvents has also been demonstrated, establishing MSCs as a potential new fluorophore for applications in biological imaging.

引用

页码：2896 / 2899

页数：4

共 29 条

[1] The use of nanocrystals in biological detection [J].

Alivisatos, P .

NATURE BIOTECHNOLOGY, 2004, 22 (01) :47-52

[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] Peptide-labeled near-infrared quantum dots for imaging tumor vasculature in living subjects [J].

Cai, WB ;

Shin, DW ;

Chen, K ;

Gheysens, O ;

Cao, QZ ;

Wang, SX ;

Gambhir, SS ;

Chen, XY .

NANO LETTERS, 2006, 6 (04) :669-676

[4] Renal clearance of quantum dots [J].

Choi, Hak Soo ;

Liu, Wenhao ;

Misra, Preeti ;

Tanaka, Eiichi ;

Zimmer, John P. ;

Ipe, Binil Itty ;

Bawendi, Moungi G. ;

Frangioni, John V. .

NATURE BIOTECHNOLOGY, 2007, 25 (10) :1165-1170

[5]

Colvin V. L., 1996, NATURE, V37, P354

[6] Inorganic clusters as single-source precursors for preparation of CdSe, ZnSe, and CdSe/ZnS nanomaterials [J].

Cumberland, SL ;

Hanif, KM ;

Javier, A ;

Khitrov, GA ;

Strouse, GF ;

Woessner, SM ;

Yun, CS .

CHEMISTRY OF MATERIALS, 2002, 14 (04) :1576-1584

[7] Synthesis of luminescent thin-film CdSe/ZnSe quantum dot composites using CdSe quantum dots passivated with an overlayer of ZnSe [J].

Danek, M ;

Jensen, KF ;

Murray, CB ;

Bawendi, MG .

CHEMISTRY OF MATERIALS, 1996, 8 (01) :173-180

[8] Optical properties of colloidal PbSe nanocrystals [J].

Du, H ;

Chen, CL ;

Krishnan, R ;

Krauss, TD ;

Harbold, JM ;

Wise, FW ;

Thomas, MG ;

Silcox, J .

NANO LETTERS, 2002, 2 (11) :1321-1324

[9] In vivo imaging of quantum dots encapsulated in phospholipid micelles [J].

Dubertret, B ;

Skourides, P ;

Norris, DJ ;

Noireaux, V ;

Brivanlou, AH ;

Libchaber, A .

SCIENCE, 2002, 298 (5599) :1759-1762

[10] In vivo near-infrared fluorescence imaging [J].

Frangioni, JV .

CURRENT OPINION IN CHEMICAL BIOLOGY, 2003, 7 (05) :626-634

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