Journal
SCIENCE
Volume 333, Issue 6042, Pages 607-610Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1207110
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Funding
- Ministry of Education, Science, and Technology (National Research Laboratory) [2008-0060004]
- Ministry of Education, Science, and Technology (World Class University) [R31-2008-000-10057-0, R31-2008-000-10055-0]
- Ministry of Education, Science, and Technology [KRF-2008-314-C00111, KRF-2010-0005390, 2010-0015035, 2011-0014209, 2011-0017605]
- Ministry of Education, Science, and Technology (Quantum Metamaterials Research Center) [R11-2008-053-03002-0]
- Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, U.S. Department of Energy [DE-AC02-05CH11231]
- Seoul Scholarship Foundation
- Ministry of Education, Science & Technology (MoST), Republic of Korea [N01110018] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science, ICT & Future Planning, Republic of Korea [KINC02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2008-0060004, 314-2008-1-C00111, 2008-0062164, 2011-0014209, 2010-0005390, R31-2011-000-10055-0, CG028401] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Graphene produced by exfoliation has not been able to provide an ideal graphene with performance comparable to that predicted by theory, and structural and/or electronic defects have been proposed as one cause of reduced performance. We report the observation of domains on exfoliated monolayer graphene that differ by their friction characteristics, as measured by friction force microscopy. Angle-dependent scanning revealed friction anisotropy with a periodicity of 180 on each friction domain. The friction anisotropy decreased as the applied load increased. We propose that the domains arise from ripple distortions that give rise to anisotropic friction in each domain as a result of the anisotropic puckering of the graphene.
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