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Mapping Local Quantum Capacitance and Charged Impurities in Graphene via Plasmonic Impedance Imaging
Xiaonan Shan1, Shan Chen1, Hui Wang2
1Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.
Advanced Materials (Deerfield Beach, Fla.)
|September 11, 2015
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.
