Analytical Modeling of Surface Potential and Figure of Merit Computation for Planar Junctionless pH Sensing BioFET

2021 ◽  
pp. 1-1
Author(s):  
Nawaz Shafi ◽  
Aasif Mohamad Bhat ◽  
Jaydeep Singh Parmar ◽  
Chitrakant Sahu ◽  
Periasamy C
Keyword(s):  
Surface Potential ◽  
Figure Of Merit ◽  
Analytical Modeling ◽  
Ph Sensing

scholarly journals 2D Analytical Modeling of Surface Potential for GaAs based Nanowire Gate All Around MOSFET

2018 ◽  
Vol 377 ◽  
pp. 012103
Author(s):  
Amit Agarwal ◽  
Raushan Tiwari ◽  
Shreya Ranjan ◽  
P.C. Pradhan ◽  
B.P. Swain
Keyword(s):  
Surface Potential ◽  
Analytical Modeling

scholarly journals Surface Potential-Controlled Oscillation in FET-Based Biosensors

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1939 ◽  
Author(s):  
Ji Hyun Kim ◽  
Seong Jun Park ◽  
Jin-Woo Han ◽  
Jae-Hyuk Ahn
Keyword(s):  
Surface Potential ◽  
Threshold Voltage ◽  
Oscillation Frequency ◽  
Point Of Care ◽  
Ring Oscillator ◽  
Ph Sensing ◽  
Label Free ◽  
Point Of Care Testing ◽  
Electrical Measurements ◽  
Readout Circuits

Field-effect transistor (FET)-based biosensors have garnered significant attention for their label-free electrical detection of charged biomolecules. Whereas conventional output parameters such as threshold voltage and channel current have been widely used for the detection and quantitation of analytes of interest, they require bulky instruments and specialized readout circuits, which often limit point-of-care testing applications. In this study, we demonstrate a simple conversion method that transforms the surface potential into an oscillating signal as an output of the FET-based biosensor. The oscillation frequency is proposed as a parameter for FET-based biosensors owing to its intrinsic advantages of simple and compact implementation of readout circuits as well as high compatibility with neuromorphic applications. An extended-gate biosensor comprising an Al2O3-deposited sensing electrode and a readout transistor is connected to a ring oscillator that generates surface potential-controlled oscillation for pH sensing. Electrical measurement of the oscillation frequency as a function of pH reveals that the oscillation frequency can be used as a sensitive and reliable output parameter in FET-based biosensors for the detection of chemical and biological species. We confirmed that the oscillation frequency is directly correlated with the threshold voltage. For signal amplification, the effects of circuit parameters on pH sensitivity are investigated using different methods, including electrical measurements, analytical calculations, and circuit simulations. An Arduino board to measure the oscillation frequency is integrated with the proposed sensor to enable portable and real-time pH measurement for point-of-care testing applications.

2-D Analytical Modeling of Surface Potential and Threshold Voltage for Vertical Super-Thin Body FET

2017 ◽  
Vol 64 (5) ◽  
pp. 2106-2112 ◽  
Author(s):  
Saurav Roy ◽  
Amitabh Chatterjee ◽  
Dheeraj Kumar Sinha ◽  
Rimma Pirogova ◽  
Srimanta Baishya
Keyword(s):  
Surface Potential ◽  
Threshold Voltage ◽  
Analytical Modeling ◽  
Thin Body
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