Influence of surface charge on the transport characteristics of nanowire-field effect transistors in liquid environments
Nozaki D, Kunstmann J, Zoergiebel F, Cuniberti G (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 106
Article Number: 203104
Journal Issue: 20
DOI: 10.1063/1.4921401
Abstract
One dimensional nanowire field effect transistors (NW-FETs) are a promising platform for sensor applications. The transport characteristics of NW-FETs are strongly modified in liquid environment due to the charging of surface functional groups accompanied with protonation or deprotonation. In order to investigate the influence of surface charges and ionic concentrations on the transport characteristics of Schottky-barrier NW-FETs, we have combined the modified Poisson-Boltzmann theory with the Landauer-Büttiker transport formalism. For a typical device, the model is able to capture the reduction of the sensitivity of NW-FETs in ionic solutions due to the screening from counter ions as well as a local gating from surface functional groups. Our approach allows to model, to investigate, and to optimize realistic Schottky-barrier NW-FET devices in liquid environment.
Involved external institutions
Germany (DE)How to cite
APA:
Nozaki, D., Kunstmann, J., Zoergiebel, F., & Cuniberti, G. (2015). Influence of surface charge on the transport characteristics of nanowire-field effect transistors in liquid environments. Applied Physics Letters, 106(20). https://dx.doi.org/10.1063/1.4921401
MLA:
Nozaki, Daijiro, et al. "Influence of surface charge on the transport characteristics of nanowire-field effect transistors in liquid environments." Applied Physics Letters 106.20 (2015).
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