硅纳米线生化传感器的最佳信噪比
Optimal signal-to-noise ratio for silicon nanowire biochemical sensors.
作者信息
Rajan Nitin K, Routenberg David A, Reed Mark A
出版信息
Appl Phys Lett. 2011 Jun 27;98(26):264107-2641073. doi: 10.1063/1.3608155. Epub 2011 Jul 1.
Abstract
The signal-to-noise ratio (SNR) for silicon nanowire field-effect transistors operated in an electrolyte environment is an essential figure-of-merit to characterize and compare the detection limit of such devices when used in an exposed channel configuration as biochemical sensors. We employ low frequency noise measurements to determine the regime for optimal SNR. We find that SNR is not significantly affected by the electrolyte concentration, composition, or pH, leading us to conclude that the major contributions to the SNR come from the intrinsic device quality. The results presented here show that SNR is maximized at the peak transconductance.
摘要
在电解质环境中运行的硅纳米线场效应晶体管的信噪比（SNR）是一个重要的品质因数，用于表征和比较此类器件在作为生化传感器的暴露通道配置中使用时的检测极限。我们采用低频噪声测量来确定最佳信噪比的范围。我们发现，信噪比不受电解质浓度、成分或pH值的显著影响，这使我们得出结论，对信噪比的主要贡献来自器件的固有质量。此处给出的结果表明，信噪比在跨导峰值处达到最大值。
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