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Jian Lin, Desalegne Teweldebrhan, Khalid Ashraf, Guanxiong Liu, Xiaoye Jing, Zhong Yan, Rong Li, Mihri Ozkan, Roger K. Lake, Alexander A. Balandin and Cengiz S. Ozkan Gating of Single-Layer Graphene with Single-Stranded Deoxyribonucleic Acids Small 6

Version of Record online: 14 MAY 2010 | DOI: 10.1002/smll.200902379

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Adenine nucleoside is physisorbed on the graphene supercell where the π orbitals of the base interact with the π orbitals of the graphene layer. Micro-Raman spectroscopy of the 2D band of pristine graphene and single-stranded DNA (ssDNA)/graphene systems indicates a shift of ≈4 cm−1 as a result of ssDNA patterning. The ssDNA fragments act as negative-potential gating agents.

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