Enhanced sensitivity of double gate junctionless transistor architecture for biosensing applications

Nanotechnology
Mukta Singh Parihar, Abhinav Kranti

Abstract

In the present work, we demonstrate the potential of double gate junctionless (JL) architecture for enhanced sensitivity for detecting biomolecules in cavity modulated field effect transistors (FETs). The higher values of body factor, achieved in asymmetric gate operation under impact ionization is utilized for enhanced sensing margin which is nearly five times higher than compared to symmetrical mode operation. The intrinsic detection sensitivity is evaluated in terms of threshold voltage change, and the ratio of drain current in the presence and absence of biomolecules in JL nanotransistors. It is shown that asymmetric mode JL transistor achieves a higher degree of detection sensitivity even for a partially filled cavity. The work demonstrates the potential of JL channel architecture for cavity based dielectric modulated FET biosensors.

References

Sep 23, 2006·Journal of Colloid and Interface Science·Zhijian WuKangtaek Lee
Jul 26, 2008·Nature Nanotechnology·Hyungsoon ImYang-Kyu Choi
Nov 17, 2009·Nano Letters·Xuan P A GaoCharles M Lieber
Feb 23, 2010·Nature Nanotechnology·Jean-Pierre ColingeRichard Murphy
Aug 12, 2010·Nano Letters·Jae-Hyuk AhnYang-Kyu Choi

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Citations

Dec 23, 2015·Chemical Reviews·Anqi Zhang, Charles M Lieber

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