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

[21] PREPARATION, CHARACTERIZATION, AND PHOTOPHYSICS OF THE QUANTUM-DOT QUANTUM-WELL SYSTEM CDS/HGS/CDS [J].

MEWS, A ;

EYCHMULLER, A ;

GIERSIG, M ;

SCHOOSS, D ;

WELLER, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (03) :934-941

[22] Multicolor light-emitting diodes based on semiconductor nanocrystals encapsulated in GaN charge injection layers [J].

Mueller, AH ;

Petruska, MA ;

Achermann, M ;

Werder, DJ ;

Akhadov, EA ;

Koleske, DD ;

Hoffbauer, MA ;

Klimov, VI .

NANO LETTERS, 2005, 5 (06) :1039-1044

[23] SYNTHESIS AND CHARACTERIZATION OF NEARLY MONODISPERSE CDE (E = S, SE, TE) SEMICONDUCTOR NANOCRYSTALLITES [J].

MURRAY, CB ;

NORRIS, DJ ;

BAWENDI, MG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (19) :8706-8715

[24] Epitaxial growth of highly luminescent CdSe/CdS core/shell nanocrystals with photostability and electronic accessibility [J].

Peng, XG ;

Schlamp, MC ;

Kadavanich, AV ;

Alivisatos, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (30) :7019-7029

[25] Luminescent ZnSe nanocrystals of high color purity [J].

Reiss, P ;

Quemard, G ;

Carayon, S ;

Bleuse, J ;

Chandezon, F ;

Pron, A .

MATERIALS CHEMISTRY AND PHYSICS, 2004, 84 (01) :10-13

[26] Emission properties of manganese-doped ZnS nanocrystals [J].

Sapra, S ;

Prakash, A ;

Ghangrekar, A ;

Periasamy, N ;

Sarma, DD .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (05) :1663-1668

[27] Optical and magnetic properties of manganese-doped zinc sulfide nanoclusters [J].

Sapra, S ;

Nanda, J ;

Anand, A ;

Bhat, SV ;

Sarma, DD .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2003, 3 (05) :392-400

[28]

SONG L, 2004, NANO LETT, V4, P2261

[29] Efficient near-infrared polymer nanocrystat light-emitting diodes [J].

Tessler, N ;

Medvedev, V ;

Kazes, M ;

Kan, SH ;

Banin, U .

SCIENCE, 2002, 295 (5559) :1506-1508

[30] High-quality violet- to red-emitting ZnSe/CdSe core/shell nanocrystals [J].

Zhong, XH ;

Xie, RG ;

Zhang, Y ;

Basché, T ;

Knoll, W .

CHEMISTRY OF MATERIALS, 2005, 17 (16) :4038-4042

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