Cheng Yao, Wang Yuansheng, Bao Feng, Chen Daqin
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
J Phys Chem B. 2006 May 18;110(19):9448-51. doi: 10.1021/jp0612073.
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.
通过调节溶液体系中镉（Cd）和硫（S）前驱体的摩尔比，选择性地合成了具有六边形或金字塔形几何形状的纤锌矿型硫化镉（CdS）纳米晶体。对于六边形纳米晶体，由于粒径分布狭窄，可以获得二维或三维超晶格组装结构。金字塔形CdS纳米晶体可分为两种几何形状：基于六边形的金字塔和基于三角形的金字塔。金字塔形几何形状的实现进一步扩展了纤锌矿型CdS纳米晶体的形状多样性，这可能为CdS半导体的发展带来新机遇。具有六边形和金字塔形形貌的CdS纳米颗粒的室温吸收光谱在峰值位置上表现出差异，揭示了CdS纳米相存在深刻的形状-性质关系。
