Research Article


2016, 9(5): 1434–1441


Metal intercalation-induced selective adatom mass transport on graphene

Xiaojie Liu1, Cai-Zhuang Wang2 (*), Myron Hupalo2, Hai-Qing Lin3, Kai-Ming Ho2, Patricia A. Thiel4, and Michael C. Tringides2

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1 Center for Quantum Science and School of Physics, Northeast Normal University, Changchun 130117, China
2 Ames Laboratory–U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
3 Beijing Computational Science Research Center, Beijing 100084, China
4 Ames Laboratory–U.S. Department of Energy, Department of Chemistry and Department of Materials Science and Engineering, IowaState University, Ames, IA 50011, USA

Keywords: graphene, intercalation, electrostatic potential, selective adsorption, first-principle calculation
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  • Abstract
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Recent experiments indicate that metal intercalation is a very effective method to manipulate the graphene-adatom interaction and control metal nanostructure formation on graphene. A key question is mass transport, i.e., how atoms deposited uniformly on graphene populate different areas depending on the local intercalation. Using first-principles calculations, we show that partially intercalated graphene, with a mixture of intercalated and pristine areas, can induce an alternating electric field because of the spatial variations in electron doping, and thus, an oscillatory electrostatic potential. This alternating field can change normal stochastic adatom diffusion to biased diffusion, leading to selective mass transport and consequent nucleation, on either the intercalated or pristine areas, depending on the charge state of the adatoms.
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Metal intercalation-induced selective adatom mass transport on graphene. Nano Res. 2016, 9(5): 1434–1441

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