TY - JOUR
T1 - Optimization of nanowire DNA sensor sensitivity using self-consistent simulation
AU - Baumgartner, S
AU - Vasicek, M
AU - Bulyha, A
AU - Heitzinger, C
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUK-I1-007-43
Acknowledgements: The authors acknowledge support by the FWF (Austrian Science Fund) project no. P20871-N13 and by the WWTF (Viennese Science and Technology Fund) project no. MA09-028. This publication is based on work supported by award no. KUK-I1-007-43, funded by the King Abdullah University of Science and Technology (KAUST).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2011/9/26
Y1 - 2011/9/26
N2 - In order to facilitate the rational design and the characterization of nanowire field-effect sensors, we have developed a model based on self-consistent charge-transport equations combined with interface conditions for the description of the biofunctionalized surface layer at the semiconductor/electrolyte interface. Crucial processes at the interface, such as the screening of the partial charges of the DNA strands and the influence of the angle of the DNA strands with respect to the nanowire, are computed by a Metropolis Monte Carlo algorithm for charged molecules at interfaces. In order to investigate the sensing mechanism of the device, we have computed the current-voltage characteristics, the electrostatic potential and the concentrations of electrons and holes. Very good agreement with measurements has been found and optimal device parameters have been identified. Our approach provides the capability to study the device sensitivity, which is of fundamental importance for reliable sensing. © IOP Publishing Ltd.
AB - In order to facilitate the rational design and the characterization of nanowire field-effect sensors, we have developed a model based on self-consistent charge-transport equations combined with interface conditions for the description of the biofunctionalized surface layer at the semiconductor/electrolyte interface. Crucial processes at the interface, such as the screening of the partial charges of the DNA strands and the influence of the angle of the DNA strands with respect to the nanowire, are computed by a Metropolis Monte Carlo algorithm for charged molecules at interfaces. In order to investigate the sensing mechanism of the device, we have computed the current-voltage characteristics, the electrostatic potential and the concentrations of electrons and holes. Very good agreement with measurements has been found and optimal device parameters have been identified. Our approach provides the capability to study the device sensitivity, which is of fundamental importance for reliable sensing. © IOP Publishing Ltd.
UR - http://hdl.handle.net/10754/599101
UR - https://iopscience.iop.org/article/10.1088/0957-4484/22/42/425503
UR - http://www.scopus.com/inward/record.url?scp=80053276051&partnerID=8YFLogxK
U2 - 10.1088/0957-4484/22/42/425503
DO - 10.1088/0957-4484/22/42/425503
M3 - Article
C2 - 21945993
SN - 0957-4484
VL - 22
SP - 425503
JO - Nanotechnology
JF - Nanotechnology
IS - 42
ER -