CO_2激光辐照石墨产生的碳纳米结构  

Production of Carbon Nanostructures by CO_2-Laser Irradiating Graphite

作　　者：王震遐[1] 余礼平[1] 马余刚[1] 朱志远[1] 何国伟[2] 胡岗[2] 陈一[2] 王绍民[3] 黄富泉[3] 胡来归[3] 

机构地区：[1]中国科学院上海原子核研究所,上海201800 [2]复旦大学材料系,上海200433 [3]浙江大学物理系,杭州310028

出　　处：《化学学报》2002年第8期1411-1414,共4页Acta Chimica Sinica

基　　金：中国科学院知识创新工程重要方向项目 (No .2 60 10 0 3 1)

摘　　要：用高分辨透射电子显微镜 (HRTEM)检查连续波CO2 激光束 (波长 10 .6 μm ,功率 30 0W )辐照石墨后发现 ,不但有通常所见的碳纳米多面体 (polyhedrons) ,纳米洋葱 (onions)和纳米管 ,而且也有罕见的腔内充填大小不等空心洋葱 (hollowonions ,HOs)的碳纳米袋 (nano bags) .同时 ,在纳米袋中一些结构相似的碳HO聚生成为HO团簇 .根据这些团簇的排布情况 ,我们认为这种聚生物有可能是HO结晶晶格生长的前体 (precursor) .A continuous-wave (CW) CO2-laser with wave length of 10.6 mum has been employed to irradiate graphite targets in air and various carbon nanostructures have been revealed by a high-resolution transmission electron microscope (HRTEM). It was found that not only carbon polyhedrons, onions and nanotubes but also unusual nano-bags filled with hollow-onions of variable diameters were produced, and that some of the similar hollow-onions agglomerated into clusters in which the hollow-ortions appear to grow spontaneously. It is proposed that these agglomerated products may be a precursor for hollow-onion crystal lattice growth.

关 键 词：石墨 碳纳米结构 CO2 激光辐照 高分辨透射电子显微镜 团簇 

分 类 号：O641[理学—物理化学]