摘要
本文利用透射电子显微镜,观测电子束诱导WO2.72单晶的生长与还原过程。通过对W纳米颗粒进行加热氧化处理(反应温度,400℃;反应时间,5 h),得到W/WO3核壳球。实验中,利用会聚电子束辐照该核壳球,发现在球体边缘及外围有WO2.72纳米棒、WO2.72纳米片的生成或沉积现象。对生成的WO2.72继续进行会聚电子束辐照,发现WO2.72被还原为具有bcc结构的W,二者间的取向关系为:[001]WO2.72//[111]W,(010)WO2.72//(011-)W。本文提供了一种简单获得高结晶度WO2.72的方法,同时结合其晶体结构对电子束辐照下的还原行为进行了深入探究。
Aid by transmission electron microscope,the growth an d reduction processes of WO2.72 single crystal are presented,induced by the high energy focused the electron beam.The W/WO3 co re-shell spheres are prepared by heating W nanoparticles under 400℃for 5 h.The W/WO3 core-shell sphere is irradiated by a conver ged electron beam,and the formation or deposition of WO272 nanorods and WO2.72 nanosheets is observed at the edge and periph ery of the sphere.The WO2.72 is reduced into W with a bcc structure under further irradiation.The orientation relationship between WO2.72 and W is[001]WO2.72//[111]W,(010)WO2.72//(011)W.This paper provides a simple method to obtain high crystallinity WO2.72 and combines its crystal structure to investigate the reductio n behavior under the electron beam irradiation.
作者
王严
文广玉
李雷
刘辉辉
彭华雨
蒋仁辉
庄园林
贾双凤
郑赫
王建波
WANG Yan;WEN Guang-yu;LI Lei;LIU Hui-hui;PENG Hua-yu;JIANG Ren-hui;ZHANG Yuan-lin;JIA Shuang-feng;ZHENG He;WANG Jian-bo(School of Physics and Technology,Center for Electron Microscopy,MOE Key Laboratory of Artificial Micro-and Nano-structures,and Institute for Advanced Studies,Wuhan University,Wuhan Hubei 430072,China)
出处
《电子显微学报》
CAS
CSCD
北大核心
2019年第6期600-607,共8页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(Nos.51871169,51671148,51271134,J1210061,11674251,51501132,51601132)
湖北省自然科学基金资助项目(Nos.2016CFB446,2016CFB155)
高等学校仪器设备和优质资源共享系统(No.CERS-1-26)
中国博士后科学基金资助项目(No.2014T70734)
江苏省自然科学基金资助项目(No.BK20191187)
