Predictive simulations and optimization of nanowire field-effect PSA sensors including screening
Type
ArticleKAUST Grant Number
KUK-I1-007-43Date
2013-05-03Online Publication Date
2013-05-03Print Publication Date
2013-06-07Permanent link to this record
http://hdl.handle.net/10754/599386
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We apply our self-consistent PDE model for the electrical response of field-effect sensors to the 3D simulation of nanowire PSA (prostate-specific antigen) sensors. The charge concentration in the biofunctionalized boundary layer at the semiconductor-electrolyte interface is calculated using the propka algorithm, and the screening of the biomolecules by the free ions in the liquid is modeled by a sensitivity factor. This comprehensive approach yields excellent agreement with experimental current-voltage characteristics without any fitting parameters. Having verified the numerical model in this manner, we study the sensitivity of nanowire PSA sensors by changing device parameters, making it possible to optimize the devices and revealing the attributes of the optimal field-effect sensor. © 2013 IOP Publishing Ltd.Citation
Baumgartner S, Heitzinger C, Vacic A, Reed MA (2013) Predictive simulations and optimization of nanowire field-effect PSA sensors including screening. Nanotechnology 24: 225503. Available: http://dx.doi.org/10.1088/0957-4484/24/22/225503.Sponsors
SB and CH acknowledge support by the FWF (Austrian Science Fund) project no. P20871-N13 and by the WWTF (Vienna Science and Technology Fund) project no. MA09-028. CH acknowledges support by award no. KUK-I1-007-43 funded by the King Abdullah University of Science and Technology (KAUST). AV and MR acknowledge support by the DTRA project no. HDTRA1-10-1-0037.Publisher
IOP PublishingJournal
NanotechnologyPubMed ID
23644739ae974a485f413a2113503eed53cd6c53
10.1088/0957-4484/24/22/225503
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