Screening model for nanowire surface-charge sensors in liquid

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dc.creatorSorensen, Martin H.
dc.creatorMortensen, Niels Asger
dc.creatorBrandbyge, Mads
dc.date2007-08-15
dc.date2007-08-17
dc.date.accessioned2026-07-07T08:27:23Z
dc.date.available2026-07-07T08:27:23Z
dc.descriptionThe conductance change of nanowire field-effect transistors is considered a highly sensitive probe for surface charge. However, Debye screening of relevant physiological liquid environments challenge device performance due to competing screening from the ionic liquid and nanowire charge carriers. We discuss this effect within Thomas-Fermi and Debye-Huckel theory and derive analytical results for cylindrical wires which can be used to estimate the sensitivity of nanowire surface-charge sensors. We study the interplay between the nanowire radius, the Thomas-Fermi and Debye screening lengths, and the length of the functionalization molecules. The analytical results are compared to finite-element calculations on a realistic geometry.
dc.description4 pages including 2 figures. Accepted for APL
dc.identifierhttps://arxiv.org/abs/0708.2001
dc.identifierhttp://arxiv.org/abs/0708.2001
dc.identifierAppl. Phys. Lett. 91, 102105 (2007).
dc.identifierdoi:10.1063/1.2779930
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/137257
dc.subjectSoft Condensed Matter
dc.subjectMesoscale and Nanoscale Physics
dc.titleScreening model for nanowire surface-charge sensors in liquid
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