Crystallographic orientation of early domains in CVD graphene studied by Raman spectroscopy

Seonyoung Jegal, Yufeng Hao, Duhee Yoon, Rodney S. Ruoff, Hoyeol Yun, Sang Wook Lee, Hyeonsik Cheong

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Crystallographic orientations of early multi-lobe graphene domains in CVD-grown graphene are investigated. Partially grown graphene domains were transferred onto flexible substrates and uniaxial tensile strain was applied. From the polarization dependence of the Raman G band, split due to strain, the crystallographic orientation was determined. It was found that there are some single crystal domains. However, lobes have different orientations in some other multi-lobe domains. Within a given lobe, the orientation does not change as the domain grows, indicating that the orientations present in a graphene domain are determined at an early stage of growth.

Original languageEnglish
Pages (from-to)146-150
Number of pages5
JournalChemical Physics Letters
StatePublished - 1 May 2013

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea grant funded by the Ministry of Education, Science and Technology (MEST) of Korea (Nos. 2011-0017605 and 2012R1A2A2A01045496 ), WCU program (R31-2008-000-10057-0), a grant (No. 2011-0031630) from the Center for Advanced Soft Electronics under the Global Frontier Research Program of the MEST, and the Sogang University Research Grant of 201214003. Y.F.H. and R.S.R. gratefully acknowledge support from the Office of Naval Research and SWAN NRI.


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