Characterization of fullerenes and carbon nanoparticles generated with a laser-furnace technique
Characterization of fullerenes and carbon nanoparticles generated with a laser-furnace technique
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激光炉技术产生的富勒烯和碳纳米颗粒的表征
DOI：
10.1007/s003390050023
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Achiba
中科院分区：
文献类型：
--
作者：
T. Ishigaki;S. Suzuki;H. Kataura;W. Krätschmer;Y. Achiba
利用激光炉装置系统地研究了石墨棒的激光烧蚀和温度梯度升华原位分离碳烟。分离后碳沉积的LD-TOF（激光脱附飞行时间）质谱显示出主要由尺寸和结构差异引起的质量分布特征。还发现，某些部分的碳沉积受到电炉环境温度等实验条件的强烈影响。利用激光拉曼光谱分析了碳沉积的结构信息。此外，为了表征激光烧蚀过程在产生高产量富勒烯的完全相同的条件下，我们使用高速摄像机在几种不同的条件下进行了发射光谱实验。基于这些实验结果，讨论了含富勒烯的纳米碳的形成过程。
Laser ablation of a graphite rod and in situ separation of carbon soot by a temperature-gradient sublimation was systematically investigated using a laser-furnace apparatus. LD-TOF (laser desorption time-of-flight) mass spectra for the carbon deposits after separation show characteristic features of mass distributions mostly caused by the differences in size and structure. It was also found that some portions of the carbon deposits were strongly influenced by the experimental conditions such as the ambient temperature of an electric furnace. Laser Raman spectroscopy was also applied to deduce structural information of the carbon deposits. Furthermore, in order to characterize the laser ablation processes under exactly the same condition used for generating a high yield of fullerenes, we performed emission spectroscopic experiments by use of a high-speed video camera under several different conditions. Based on these experimental findings, the formation processes of carbon nanoparticles including fullerenes are discussed.