Mapping Local Quantum Capacitance and Charged Impurities in Graphene via Plasmonic Impedance Imaging.

Shan, Xiaonan; Chen, Shan; Wang, Hui; Chen, Zixuan; Guan, Yan; Wang, Yixian; Wang, Shaopeng; Chen, Hong-Yuan et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

Local quantum capacitance of graphene is imaged with plasmonics-based electrical impedance microscopy, from which the local density and polarity of charged impurities, electron and hole puddles associated with the charged impurities, and the density of the impurity states are determined.

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