ZnO纳米棒中结的透射电镜研究  

TEM research on the collision-induced junction during the growing process on ZnO nanorods

作　　者：章新政[1] 单旭东[1] 尤力平[1] 俞大鹏[1] 

机构地区：[1]北京大学物理学院北京大学电子显微镜实验室,北京100871

出　　处：《电子显微学报》2008年第5期341-345,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家重点基础研究发展计划973项目(2002CB613505)

摘　　要：本文采用化学气相沉积法制得大量ZnO纳米棒,利用会聚束电子衍射(CBED)研究了纳米棒的生长方向,验证了纳米棒在生长过程中产生碰撞。通过TEM研究发现,纳米棒沿c轴生长,碰撞形成的晶界并不是一个随机取向的大角晶界,为了降低能量,晶界具有孪晶关系。晶界的存在导致晶体产生缺陷生长,使纳米棒的结的附近区域长粗。ZnO nanorods were synthesized via simple chemical vapor deposition method （CVD）. The nanorods collided with each other during the growing process and formed the junctions. Further TEM research on these junctions indicates that the nanorods grew along the c axis. The junctions were formed due to the collision in the growing process, which was proved by the characterization of the growing direction of the nanorods via converged-beam electron diffraction （CBED）. The grain boundary due to the collision tended to form twin boundary as energy favorite and led a defect growth at the junction. As a result, the nanorods around the junction became thick.

关 键 词：孪晶 碰撞 氧化锌 纳米棒 会聚束 

分 类 号：TB383.1[一般工业技术—材料科学与工程]