微晶
拉曼光谱
激光器
材料科学
衍射
光谱学
同步辐射
分析化学(期刊)
航程(航空)
光学
化学
物理
色谱法
量子力学
复合材料
冶金
作者
Luiz Gustavo Cançado,Kazuyuki Takai,Toshiaki Enoki,Morinobu Endo,Yoong Ahm Kim,Hirofumi Mizusaki,Ado Jório,L. N. Coelho,R. Magalhães-Paniago,M. A. Pimenta
摘要
This work presents a systematic study of the ratio between the integrated intensities of the disorder-induced D and G Raman bands (ID∕IG) in nanographite samples with different crystallite sizes (La) and using different excitation laser energies. The crystallite size La of the nanographite samples was obtained both by x-ray diffraction using synchrotron radiation and directly from scanning tunneling microscopy images. A general equation for the determination of La using any laser energy in the visible range is obtained. Moreover, it is shown that ID∕IG is inversely proportional to the fourth power of the laser energy used in the experiment.
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