您的位置：首页 > 论文页面
不同能流的飞秒激光脉冲烧蚀高定向热解石墨的表面结构研究
发表时间：2013-08-15 浏览量：1846 下载量：798
| 全部作者： | 张楠，冯培培 |
| 作者单位： | 南开大学现代光学研究所，光学信息技术科学教育部重点实验室 |
| 摘 要： | 使用1.1~178.0 J/cm2不同激光能流的50 fs脉冲激光在空气中烧蚀高定向热解石墨(highly oriented pyrolytic graphitej，HOPG)，在其表面制备出多种微纳碳结构，包括枝杈状碳结构和尺寸小至100 nm的颗粒。这些碳纳米颗粒在白光照射下可以形成彩虹状或平行的彩色图样。通过对烧蚀过的石墨表面进行显微拉曼光谱测量发现，石墨表面产生的这些微纳结构均保持了石墨的sp2键，但除了枝杈结构外，其余微纳结构的石墨层间结构均被破坏。由此可以推断，枝杈状结构的形成主要源于光机械机制，而其余微纳结构均在激光烧蚀中经历了热转变过程。 |
| 关 键 词： | 光学；微纳碳结构；飞秒激光烧蚀；高定向热解石墨 |
| Title： | Investigation on the surface structure of highly oriented pyrolytic graphite ablated by femtosecond laser pulses with different laser fluence |
| Author： | ZHANG Nan, FENG Peipei |
| Organization： | Key Laboratory of Optical Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University |
| Abstract： | In this paper, 50 fs laser pulses with different laser fluences ranging from 1.1 to 178.0 J/cm2 are used to ablate highly oriented pyrolytic graphite (HOPG). Multiple kinds of carbon micro-/nano-structures are obtained at the ablated target surface, including branch-like graphite structure and carbon nano-particles with sizes down to 100 nm. These carbon nano-materials can form rainbow-like or parallel colorful pattern when irradiated by a white light source. In addition, it is found that the generated micro-structures on the ablated graphite surface still retain the sp2 bond by using the micro-Raman spectroscopy, but except for the branch-like structures do not have the graphite’s layer structures. Therefore it can be deduced that the brach-like structure is formed mainly by the optomechanical mechanism and other structures all undergo the thermal transition process during the ablation. |
| Key words： | optics; carbon micro-/nano-structure; femtosecond laser ablation; highly oriented pyrolytic graphite |
| 发表期数： | 2013年8月第15期 |
| 引用格式： | 张楠，冯培培. 不同能流的飞秒激光脉冲烧蚀高定向热解石墨的表面结构研究[J]. 中国科技论文在线精品论文，2013，6（15）：1388-1392. |
1
评论数 0请您登录
暂无评论
下载全文
多维论文