铋纳米线和纳米片的制备  

Synthesis of Bi Nanowires and Nanoplates

作　　者：唐春娟[1] 杨慧琴[1] 张永胜[1] 苏剑峰[1] 

机构地区：[1]洛阳理工学院数理部,洛阳471023

出　　处：《材料研究学报》2011年第3期273-277,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金60876014;河南省科技厅自然科学基金092300410131资助项目~~

摘　　要：通过调控水和乙二胺溶液的组份控制产物的形貌和结构,制备了铋纳米线和铋纳米片,研究了组份变化对产物形貌结构的影响,并依此提出了乙二胺模板效应以及由乙二胺引起的从动力学向热力学转换控制晶体生长的生长机制。铋纳米线的体膨胀系数随着温度的升高减小,并在一转变温度(455℃左右,低于块体的转变温度)变为负值。Bi nanowires and nanoplates were synthesized by controlling the composition of the mixture solution of water and ethylenediamine.The effect of the composition exchange on the morphology and structure was investigated.The results show that the formation mechanisms of the nanowires and nanoplates can be ascribed to the template effect of ethylenediamine and ethylenediamine-induced transition from thermodynamic to dynamic control of the growth.The volumetric thermal expansion coefficient of nanowires decreases with increasing temperature and becomes negative at the conversion temperature （about 455℃）.

关 键 词：半金属材料 铋纳米线 铋纳米片 模板效应 体膨胀系数 

分 类 号：TG113[金属学及工艺—物理冶金]