氮化硼纳米管的显微表征及其高分辨成像研究  

MICROSCOPIC CHARACTERIZATION AND HRTEM IMAGES OF BORON NITRIDE NANOTUBES

作　　者：唐蓓[1] 刘永利[1] 郑宏[1] 李峰[1] 丛洪涛[1] 成会明[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《金属学报》2005年第9期905-909,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目50025204

摘　　要：采用化学气相沉积法制备了多壁氮化硼纳米管(BNNT),高分辨电镜研究表明,BNNT一个重要的结构特征为层间有序堆垛,且大多以菱面体(r-BN)方式堆垛;多数BNNT具有择优生长取向,管轴沿BN六角网格平面的[1010]方向,即多数BNNT为锯齿型.基于其显微结构特征建立了多壁BNNT的结构模型,并通过计算机模拟其高分辨成像特点,发现r-BN堆垛的BNNT的HRTEM成像效果对其直径、层数以及观察视角等参数敏感,提出也可以通过管身高分辨像出现水纹状条纹直接判别r-BN堆垛.Multi-walled boron nitride nanotubes （BNNTs） synthesized by chemical vapor deposition were revealed to possess a definite stacking order （dominant r-BN stacking） and preferential zigzag chirality. Based on the microscopic characters of BNNTs, structure models were built and computer simulations of HRTEM images were carried out. It was found that HRTEM images of BNNTs with r-BN stacking are sensitive to the wall number, tubes diameter and angle of observations. Appearance of moiré fringe on the HRTEM image of tube body was proposed to judge the existance of r-BN stacking.

关 键 词：氮化硼纳米管 微观结构 模拟 高分辨像 

分 类 号：TG111.2[金属学及工艺—物理冶金]