General equation for the determination of the crystallite size La of nanographite by Raman spectroscopy
Luiz Gustavo CançadoTokyo Institute of Technology Department of Chemistry, , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanKazuyuki TakaiTokyo Institute of Technology Department of Chemistry, , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanToshiaki EnokiTokyo Institute of Technology Department of Chemistry, , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanMorinobu EndoShinshu University Faculty of Engineering, , 4-17-1 Wakasato, Nagano-shi 380-8553, JapanYoong Ahm KimShinshu University Faculty of Engineering, , 4-17-1 Wakasato, Nagano-shi 380-8553, JapanHiroshi MizusakiShinshu University Faculty of Engineering, , 4-17-1 Wakasato, Nagano-shi 380-8553, JapanAdo JórioUniversidade Federal de Minas Gerais Departamento de Física, , 30123-970 Belo Horizonte, BrazilL. N. CoelhoUniversidade Federal de Minas Gerais Departamento de Física, , 30123-970 Belo Horizonte, BrazilR. Magalhães‐PaniagoUniversidade Federal de Minas Gerais Departamento de Física, , 30123-970 Belo Horizonte, BrazilM. A. PimentaUniversidade Federal de Minas Gerais Departamento de Física, , 30123-970 Belo Horizonte, Brazil
2006en
ABI
Abstract
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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