Hole-doping of mechanically exfoliated graphene by confined hydration layers 被引量：1

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摘要 By the use of non-contact atomic force microscopy （NC-AFM） and Kelvin probe force microscopy （KPFM）, we measure the local surface potential of mechanically exfoliated graphene on the prototypical insulating hydrophilic substrate of CAF2（111）. Hydration layers confined between the graphene and the CaF2 substrate, resulting from the graphene＇s preparation under ambient conditions on the hydrophilic substrate surface, are found to electronically modify the graphene as the material＇s electron density transfers from graphene to the hydration layer. Density functional theory （DFT） calculations predict that the first 2 to 3 water layers adjacent to the graphene hole-dope the graphene by several percent of a unit charge per unit cell.

作者 Tjeerd R. J. Bollmann Liubov Yu. Antipina Matthias Temmen Michael Reichling Pavel B. Sorokin

机构地区 Inorganic Materials Science Fachbereich Physik Moscow Institute of Physics and Technology Siberian Federal University National University of Science and Technology MISiS

出处《Nano Research》 SCIE EI CAS CSCD 2015年第9期3020-3026,共7页 纳米研究（英文版）

分类号 O [理学]

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1Novoselov, K. S.; Geim, A. K.; Morozov, S. V.; Jiang, D.; Zhang, Y.; Dubonos, S. V.; Grigorieva, I. V.; Firsov, A. A. Electric field effect in atomically thin carbon films. Science 2004, 306, 666~69.
2Tang, D.-M.; Kvashnin, D. G.; Najmaei, S.; Bando, Y.; Kimoto, K.; Koskinen, P.; Ajayan, P. M.; Yakobson, B. S.; Sorokin, P. B.; Lou, J. et al. Nanomechanical cleavage of molybdenum disulphide atomic layers. Nat Commun. 2014, 5, 3631.
3Song, J.; Ko, T. Y.; Ryu, S. Raman spectroscopy study of annealing-induced effects on graphene prepared by micro- mechanical exfoliation. Bull Korean Chem Soc 2010, 31, 2679-2682.
4Xu, K.; Cao, P. G.; Heath, J. R. Graphene visualizes the firstwater adlayers on mica at ambient conditions. Science 2010, 329, 1188-1191.
5Cao, P. G.; Xu, K.; Varghese, J. O.; Heath, J. R. The micros- copic structure of adsorbed water on hydrophobic surfaces under ambient conditions. Nano Lett 2011, 11, 5581-5586.
6He, K. T.; Wood, J. D.; Doidge, G. P.; Pop, E.; Lyding, J. W. Scanning tunneling microscopy study and nanomanipulation of graphene-coated water on mica. Nano Lett 2012, 12, 2665-2672.
7Komurasaki, H.; Tsukamoto, T.; Yamazaki, K.; Ogino, T. Layered structures of interracial water and their effects on Raman spectra in graphene-on-sapphire systems. J. Phys. Chem. C 2012, 116, 10084-10089.
8Lee, M. J.; Choi, J. S.; Kim, J.-S.; Byun, I.-S.; Lee, D. H.; Ryu, S.; Lee, C.; Park, B. H. Characteristics and effects of diffused water between graphene and a SiO2 substrate. Nano Res. 2012, 5, 710-717.
9Severin, N.; Lange, P.; Sokolov, I. M.; Rabe, J. P. Reversible dewetting of a molecularly thin fluid water film in a soft graphene/mica slit pore. Nano Lett. 2012, 12, 774-779.
10Shim, J.; Lui, C. H.; Ko, T. Y.; Yu, Y.-J.; Kim, P.; Heinz, T. F. Water-gated charge doping ofgraphene induced by mica substrates. Nano Lett. 2012, 12, 648-654.