Synthesis of ZnSe quantum dots and ZnSe-ZnS core/shell nanostructures

被引：13

作者：

Ali, Moazzam ^{[1
]}

Sarma, D. D. ^{[1
]}

机构：

[1] Indian Inst Sci, Solid Stat & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2007年 / 7卷 / 06期

关键词：

colloidal nanocrystals; core-shell structure; ZnSe; ZnSe-ZnS;

D O I：

10.1166/jnn.2007.748

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Colloidal ZnSe nanocrystals were synthesized in hot mixtures of long-chain alkylamines, fatty acids, and alkylphosphines. It was possible to tune the size of nanocrystals by varying the reaction time. Transmission electron microscope images showed the presence of spherical ZnSe nanocrystals and X-ray diffraction pattern of ZnSe nanocrystals showed the existence of both the crystalline phase, namely, wurtzite and zinc blencle. The ZnSe nanocrystals were then passivated with higher band gap ZnS; this lead to a 2.6-fold enhancement in the integrated photoluminescence intensity of ZnSe nanocrystals. We also synthesized the reverse type core/shell ZnS/ZnSe nanocrystals. These exhibited a significant red shift in the absorption edge after coating with a thin ZnSe shell.

引用

页码：1960 / 1964

页数：5

共 30 条

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

Alivisatos, P .

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

[2] Light trapped in a photonic dot: Microspheres act as a cavity for quantum dot emission [J].

Artemyev, MV ;

Woggon, U ;

Wannemacher, R ;

Jaschinski, H ;

Langbein, W .

NANO LETTERS, 2001, 1 (06) :309-314

[3] Colloidal two-dimensional systems: CdSe quantum shells and wells [J].

Battaglia, D ;

Li, JJ ;

Wang, YJ ;

Peng, XG .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (41) :5035-5039

[4]

Braun M, 2001, J PHYS CHEM A, V105, P5548, DOI 10.1021/jp0100021

[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] Luminescent quantum dots for multiplexed biological detection and imaging [J].

Chan, WCW ;

Maxwell, DJ ;

Gao, XH ;

Bailey, RE ;

Han, MY ;

Nie, SM .

CURRENT OPINION IN BIOTECHNOLOGY, 2002, 13 (01) :40-46

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

Chan, WCW ;

Nie, SM .

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

[8] Blue semiconductor nanocrystal laser [J].

Chan, Y ;

Steckel, JS ;

Snee, PT ;

Caruge, JM ;

Hodgkiss, JM ;

Nocera, DG ;

Bawendi, MG .

APPLIED PHYSICS LETTERS, 2005, 86 (07) :1-3

[9] White-light emission from organics-capped ZnSe quantum dots and application in white-light-emitting diodes [J].

Chen, HS ;

Wang, SJJ ;

Lo, CJ ;

Chi, JY .

APPLIED PHYSICS LETTERS, 2005, 86 (13) :1-3

[10] Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS quantum dots synthesized from ZnO [J].

Chen, HS ;

Lo, B ;

Hwang, JY ;

Chang, GY ;

Chen, CM ;

Tasi, SJ ;

Wang, SJJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (44) :17119-17123

← 1 2 3 →