Publikationsdatum:
2011-07-02
Beschreibung:
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 degrees 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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Choi, Jin Sik -- Kim, Jin-Soo -- Byun, Ik-Su -- Lee, Duk Hyun -- Lee, Mi Jung -- Park, Bae Ho -- Lee, Changgu -- Yoon, Duhee -- Cheong, Hyeonsik -- Lee, Ki Ho -- Son, Young-Woo -- Park, Jeong Young -- Salmeron, Miquel -- New York, N.Y. -- Science. 2011 Jul 29;333(6042):607-10. doi: 10.1126/science.1207110. Epub 2011 Jun 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Quantum Phases and Devices, Department of Physics, Konkuk University, Seoul 143-701, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21719640" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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