Preparation of fluorescent SiO2 particles with single CdTe nanocrystal cores by the reverse microemulsion method

被引：261

作者：

Yang, YH ^{[1
]}

Gao, MY ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Key Lab Colloid Interface Sci & Chem Thermodynam, Beijing 100080, Peoples R China

来源：

ADVANCED MATERIALS | 2005年 / 17卷 / 19期

关键词：

D O I：

10.1002/adma.200500403

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly fluorescent CdTe@SiO2 core-shell-structured spheres (see Figure) are prepared via hydrolysis and condensation of tetraethyl orthosilicate in water-in-oil emulsions. Systematic results reveal that the electrostatic interactions between negatively charged CdTe nanocrystals (NCs) and silica intermediates play a critical role in determining the final structures of the resultant particles. Following this mechanism, the number of CdTe NCs encapsulated in silica spheres is successfully tuned.

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页码：2354 / +

页数：5

相关论文

共 21 条

[1] Enhancement effect of illumination on the photoluminescence of water-soluble CdTe nanocrystals: Toward highly fluorescent CdTe/CdS core-shell structure [J].

Bao, HB ;

Gong, YJ ;

Li, Z ;

Gao, MY .

CHEMISTRY OF MATERIALS, 2004, 16 (20) :3853-3859

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

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

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

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

Chan, WCW ;

Nie, SM .

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

[4] Incorporation of luminescent nanocrystals into monodisperse core-shell silica microspheres [J].

Chan, Y ;

Zimmer, JP ;

Stroh, M ;

Steckel, JS ;

Jain, RK ;

Bawendi, MG .

ADVANCED MATERIALS, 2004, 16 (23-24) :2092-+

[5] PREPARATION AND PROPERTIES OF TAILORED MORPHOLOGY, MONODISPERSE COLLOIDAL SILICA CADMIUM-SULFIDE NANOCOMPOSITES [J].

CHANG, SY ;

LIU, L ;

ASHER, SA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (15) :6739-6744

[6] Kinetics of formation of monodisperse colloidal silica particles through the hydrolysis and condensation of tetraethylorthosilicate [J].

Chen, SL ;

Dong, P ;

Yang, GH ;

Yang, JJ .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1996, 35 (12) :4487-4493

[7] Stabilization of CdS semiconductor nanoparticles against photodegradation by a silica coating procedure [J].

Correa-Duarte, MA ;

Giersig, M ;

Liz-Marzan, LM .

CHEMICAL PHYSICS LETTERS, 1998, 286 (5-6) :497-501

[8]

Derfus AM, 2004, NANO LETT, V4, P11, DOI 10.1021/nl0347334

[9] Strongly photoluminescent CdTe nanocrystals by proper surface modification [J].

Gao, MY ;

Kirstein, S ;

Möhwald, H ;

Rogach, AL ;

Kornowski, A ;

Eychmüller, A ;

Weller, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (43) :8360-8363

[10] Thiol-capping of CdTe nanocrystals:: An alternative to organometallic synthetic routes [J].

Gaponik, N ;

Talapin, DV ;

Rogach, AL ;

Hoppe, K ;

Shevchenko, EV ;

Kornowski, A ;

Eychmüller, A ;

Weller, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (29) :7177-7185