Journal
SOLID-STATE ELECTRONICS
Volume 88, Issue -, Pages 82-88Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sse.2013.04.016
Keywords
Nanoelectrodes; Capacitive biosensor; AC screening; Modeling and simulation
Funding
- FP7 NANOFUNCTION NoE project (FP7-ICT) [257375]
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We develop theoretical models and numerical simulators to accurately describe the AC signal response of nanoelectrodes to the presence of biomolecules, in order to aid the design of capacitive biosensors. In particular, we first develop an analytical model for the electrolyte response to AC signal stimulation, showing that it is possible to define an AC screening length as in the standard Debye-Huckel theory. We then develop a full-custom numerical simulator for a simple nanoelectrode system, where the AC part is solved in the small-signal approximation, coupled to the DC solution. We validate the solver using the analytical model, and then use it to understand the effect of a dielectric biomolecule on the biosensor admittance. (C) 2013 Elsevier Ltd. All rights reserved.
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