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PbS纳米棒的制备以及生长机理

Synthesis and the Growth Mechanism of PbS Nanorod

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【作者】 王智宇祖胜男赵彬张福安林旭添王民权钱国栋

【Author】 Wang Zhiyu, Zu Shengnan, Zhao Bin, Zhang Fuan, Lin Xutian, Wang Minquan, Qian Guodong(State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering,Zhejiang University, Hangzhou 310027, China)

【机构】 浙江大学材料科学与工程系硅材料国家重点实验室

【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。

【Abstract】 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
【Key words】 PbSnanorodoriented attachment
【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
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2008年S2期
  • 【分类号】TB383.1
  • 【被引频次】3
  • 【下载频次】107
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