Modeling Electrolytically Top-Gated Graphene
Abstract
We investigate doping of a single-layer graphene in the presence of electrolytic top gating. The interfacial phenomenon is modeled using a modified Poisson-Boltzmann equation for an aqueous solution of simple salt. We demonstrate both the sensitivity of graphene’s doping levels to the salt concentration and the importance of quantum capacitance that arises due to the smallness of the Debye screening length in the electrolyte.
- Publication:
-
Nanoscale Research Letters
- Pub Date:
- March 2010
- DOI:
- 10.1007/s11671-009-9515-3
- arXiv:
- arXiv:0910.3666
- Bibcode:
- 2010NRL.....5..505M
- Keywords:
-
- Graphene;
- Electrolyte;
- Poisson–Boltzmann model;
- Gating;
- Quantum capacitance;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- 7 pages, including 4 figures, submitted to Nanoscale Research Letters for a special issue related to the NGC 2009 conference (http://asdn.net/ngc2009/index.shtml)