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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 20일 (금요일) 13:00~14:30 |
| Code |
PHYS.P-116 |
| Subject |
Fundamental Raman Study of Single and Few layer 13C Graphene |
| Authors |
hwansoo jeon, Sunmin Ryu*
Department of Chemistry, Pohang University of Science and Technology, Korea
|
| Abstract |
13C graphene has different lattice vibration frequencies than its isotopologue 12C graphene because of difference in their atomic masses. While the Raman scattering of single and multi-layer 12C graphene has been extensively studied during the past decade, the same statement can hardly be made for 13C graphene. In this work, we systematically investigated the Raman scattering of single and multi-layer 13C graphene prepared by mechanical exfoliation of 13C graphite. As the number of layers increased, G peak grew in intensity and the line shape of 2D peak converged to that of 13C graphite. Based on the G peak intensity and line shape of 2D peak, the thickness could be reliably determined from single to 8 layers. To establish Raman metrology for lattice strain and charge density of 13C graphene, extensive Raman mapping was performed and lead to a quantitative correlation between G and 2D frequencies. To determine the dispersion of 2D frequency as a function of excitation energy, bilayer 13C graphene was probed at various excitation energies of 1.96, 2.41 and 2.71 eV. As excitation energy increased, the 2D peak up-shifted because excitation energy affects the vibration mode selected during the process of double resonance. This work will expand the utility of 13C graphene in various research and applications. |
| E-mail |
hwansoojeon@postech.ac.kr |
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120th General Meeting of the KCS