PbS纳米棒的制备以及生长机理  

Synthesis and the Growth Mechanism of PbS Nanorod

作　　者：王智宇[1] 祖胜男[1] 赵彬[1] 张福安[1] 林旭添[1] 王民权[1] 钱国栋[1] 

机构地区：[1]浙江大学材料科学与工程系,硅材料国家重点实验室,浙江杭州310027

出　　处：《稀有金属材料与工程》2008年第A02期376-378,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50532030);教育部跨世纪优秀人才培养计划资助项目

摘　　要：首次在中高温(>150℃)的有机体系中,结合表面活性剂成功制备出规整的PbS纳米棒,在短时间(约25 s)快速冷却的条件下研究了初始晶核的微观形貌,这对理解PbS纳米棒的生长具有重要意义,根据初始晶核偶极子的分析计算,认为:在晶核<100>方向上的偶极子作用是PbS纳米棒形成的主要推动力;确认了晶粒的粗化过程属于"定向附着"而不是Ostalwald熟化过程。The uniform PbS nanorods were synthesized by surfactant modification in organic solvent at relative high temperature （〉 150 ℃）. A ultra-short reaction time （-25 s） and rapid cooling were employed to investigate the nuclei prior to any further growth, the nuclei posses 8 { 111 } facets and 6 { 100} facets, which is helpful to understand its shape evolvement. The dipole in the direction of 〈100〉 was speculated as the main driving force in the assembly process. The nanocrystal ripening process is ＂Oriented Attachment＂ rather than ＂Ostalwald ripening＂.

关 键 词：PBS 纳米棒 定向附着 

分 类 号：TB383.1[一般工业技术—材料科学与工程]