Raman spectroscopy at the edges of multilayer graphene |
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| Affiliation: | 1. Division of Environment, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;2. Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;3. Materials Characterization and Preparation Facility, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;4. Advanced Engineering Materials Facility, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;1. IEMN, University of Lille, Av. Poincaré CS 60069, 59652 Villeneuve d’Ascq Cedex, France;2. Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin-BP 48, 91192 Gif sur Yvette Cedex, France;1. Extreme Conditions Physics Research Laboratory, Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand;2. Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand;3. Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, DC, 20015, USA;4. Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand;5. Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, 30000, Thailand;6. Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China;7. University of Science and Technology of China, Hefei, 230026, Anhui, People’s Republic of China;1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo, 315201, PR China;2. University of Chinese Academy of Sciences 19(A) Yuquan Road, Beijing, 100049, PR China |
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| Abstract: | Individual graphene layers in a multilayer graphene sample contribute their own edges. The edge of a graphene layer laid on an n layer graphene (nLG) is a building block for the edges of multilayer graphenes. We found that the D band observed from the edge of the top graphene layer laid on the nLG exhibits an identical line shape to that of disordered (n + 1)LG. Based on the spectral features of the D and 2D bands, we identified two types of alignment configurations at the edges of bilayer and trilayer graphenes, whose edges are well-aligned from their optical images. |
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