Formation of luminescent CdTe-silica nanoparticles through an inverse microemulsion technique

被引：38

作者：

Selvan, ST ^{[1
]}

Li, CL ^{[1
]}

Ando, M ^{[1
]}

Murase, N ^{[1
]}

机构：

[1] AIST, Photon Res Inst, Ikeda, Osaka 5638577, Japan

来源：

CHEMISTRY LETTERS | 2004年 / 33卷 / 04期

关键词：

D O I：

10.1246/cl.2004.434

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CdTe quantum dots (QDs, 3-6 nmphi) were incorporated into silica nanoparticles (20-30 nmphi) by an inverse microemulsion technique. The transmission electron microscope image shows that the QDs are situated on the surface of silica particles. These QD-silica particles in solution exhibited a stable luminescence with at least the similar quantum efficiency (ca. 5%) as that of the initial colloidal solution over several weeks of storage. The particles taken out from the solution as a powder form showed the same quantum efficiency for a long time as well. This is because silica acts as an effective protective environment for the QDs.

引用

收藏

页码：434 / 435

页数：2

相关论文

共 17 条

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

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

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

[2] 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

[3] 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

[4] (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites [J].

Dabbousi, BO ;

RodriguezViejo, J ;

Mikulec, FV ;

Heine, JR ;

Mattoussi, H ;

Ober, R ;

Jensen, KF ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) :9463-9475

[5] REFERENCE MATERIALS FOR FLUORESCENCE MEASUREMENT [J].

EATON, DF .

PURE AND APPLIED CHEMISTRY, 1988, 60 (07) :1107-1114

[6] Optical gain and stimulated emission in nanocrystal quantum dots [J].

Klimov, VI ;

Mikhailovsky, AA ;

Xu, S ;

Malko, A ;

Hollingsworth, JA ;

Leatherdale, CA ;

Eisler, HJ ;

Bawendi, MG .

SCIENCE, 2000, 290 (5490) :314-317

[7] Sizing of colloidal nanoparticles by electrospray and differential mobility analyzer methods [J].

Lenggoro, IW ;

Xia, B ;

Okuyama, K ;

de la Mora, JF .

LANGMUIR, 2002, 18 (12) :4584-4591

[8] Synthesis of highly luminescent glasses incorporating CdTe nanocrystals through sol-gel processing [J].

Li, CL ;

Murase, N .

LANGMUIR, 2004, 20 (01) :1-4

[9] Synthesis of nanosized gold-silica core-shell particles [J].

Liz-Marzan, LM ;

Giersig, M ;

Mulvaney, P .

LANGMUIR, 1996, 12 (18) :4329-4335

[10] Surface plasmon spectroscopy of nanosized metal particles [J].

Mulvaney, P .

LANGMUIR, 1996, 12 (03) :788-800