期刊
NANO LETTERS
卷 11, 期 9, 页码 3543-3549出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl201070c
关键词
Functionalized graphene; Kelvin probe force microscopy; electrical conductivity; contact resistance; sheet resistance
类别
资金
- Army Research Office (ARO)/Multidisciplinary Research Initiative (MURI) [W911NF-09-1-476]
- Pacific Northwest National Laboratory [66354]
- Alexander von Humboldt Foundation
We studied the local voltage drop in functionalized graphene sheets of sub mu m size under external bias conditions by Kelvin probe force microscopy. Using this noninvasive experimental approach, we measured ohmic current-voltage characteristics and an intrinsic conductivity of about 3.7 x 10(5) S/m corresponding to a sheet resistance of 2.7 k Omega/sq under ambient conditions for graphene produced via thermal reduction of graphite oxide. The contact resistivity between functionalized graphene and metal electrode was found. to be <6.3 x 10(-7) Omega cm(2).
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