水相CdTe纳米晶的合成、生长机理和应用研究  

The progress in synthesis,evolution mechanism and applications of water-soluable CdTe nanocrystals

作　　者：于伟利 张皓[1,2] 杨柏 

机构地区：[1]超分子结构与材料国家重点实验室 [2]吉林大学化学学院,长春130012

出　　处：《中国科学：化学》2012年第11期1540-1553,共14页SCIENTIA SINICA Chimica

基　　金：国家重大基础研究发展计划项目(2012CB933802);国家自然科学基金项目(50973039;20921003;91123031)的支持

摘　　要：纳米晶在生物检测、光电器件、光波导、可调激光器等领域有着广泛的应用前景.本文以CdTe为例,对近年来水相纳米晶合成和生长机理方面的研究进展作了简要的归纳和论述.水相合成纳米晶具有操作简单、价格低廉、在水溶液中稳定性高等优点,并可以通过静电力、范德华力等弱相互作用实现一维、二维甚至三维结构的组装.对纳米晶的生长机理的研究涵盖了热力学主导的Ostwald熟化(Ostwald ripening)机理和动力学控制的聚集机理两个主要方面.文章最后对水相合成CdTe纳米晶的应用进行了总结和展望.Nanocrystals （NCs） have wide applications in the fields of biological testing, optoelectronic devices, optical waveguides, and tunable lasers. This review gives a brief review on the progress of synthesis and evolution mechanism of NCs, especially for CdTe. Aqueous synthesis is reproducible, cheap, and the as-prepared samples have high aqueous stability. The NCs can be self-assemblized into one dimensional, two dimensional even three dimensional nanostructures via weak interactions like van de Waals forces, electrostatic forces, etc. The evolution mechanism of NCs includes both thermodynamic-favored Ostwald ripening and kinetics-dominated aggregation mechanism. Finally, the progress of application for water soluble CdTe NCs are summarized and predicated.

关 键 词：CdTe纳米晶 水相合成 热力学 动力学 生长机理 

分 类 号：TB383.1[一般工业技术—材料科学与工程]