Shape control of monodisperse CdS nanocrystals: Hexagon and pyramid

被引：83

作者：

Cheng, Yao ^{[1
]}

Wang, Yuansheng ^{[1
]}

Bao, Feng ^{[1
]}

Chen, Daqin ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Grad Sch, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 19期

关键词：

Crystal structure - Morphology - Nanostructured materials - Particle size analysis - Solutions - Synthesis (chemical);

D O I：

10.1021/jp0612073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The wurtzite CdS nanocrystals with hexagonal or pyramidal geometries were selectively synthesized by tuning the molar ratio of Cd and S precursors in the solution system. For hexagonal nanocrystals, a 2-D or 3-D superlattice assembly could be obtained due to the narrow particle size distribution. The pyramidal CdS nanocrystals were divided into two geometries: the hexagon-based pyramid and the triangle-based pyramid. The realization of the pyramidal geometries further extends the shape multiformity of wurtzite CdS nanocrystals, which may bring new opportunities for the development of CdS semiconductors. The room-temperature absorption spectra of CdS nanoparticles with hexagonal and pyramidal morphologies exhibited a discrepancy in peak positions, revealing the existence of a profound shape-property relationship for the CdS nanophase.

引用

页码：9448 / 9451

页数：4

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