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We analyze the doping fluctuation induced stochastic performance variation in charge based Si nanowire (SiNW) biosensors. We show that for given doping statistics and system topology configuration, electrostatic biasing condition can be tuned to optimize overall sensor sensitivity. Systems that utilize NW arrays may achieve optimal sensitivity at different biasing condition than that for individual...
A numerical study on the operation of Si nanowire (NW) biosensors in charge-based sensing is presented. The simulation is built on physical models that, upon numerical convergence, coherently account for Fermi–Dirac, Poisson–Boltzman, site-binding and Gouy–Chapman–Stern theories in self-consistent manner. The method enables us to disentangle the impact of key design and experimental setup factors...
We present here a numerically simulated pH sensing performance of Si nanowire (SiNW) FETs. The simulation is formulated based on Fermi-Dirac, Poisson-Boltzman, site-binding and Gouy-Chapman-Stern theories. Device characteristics (Vt, SS, On/Off, etc.) and pH sensing linearity/sensitivity from simulation match well with our sensing experiments using SiNW FETs fabricated with CMOS compatible process...
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