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Papers by Sharmistha Shee
Journal of Computational Electronics
We propose and investigate a biosensor based on a transparent dielectric-modulated dual-trench ga... more We propose and investigate a biosensor based on a transparent dielectric-modulated dual-trench gate-engineered metaloxide-semiconductor field-effect transistor (DM DT GE-MOSFET) for label-free detection of biomolecules with enhanced sensitivity and efficiency. Various sensing parameters such as the I ON /I OFF ratio and the threshold voltage shift are evaluated as metrics to validate the proposed sensing device. Additionally, S Vth (the V th sensitivity) is also analyzed, considering both positively and negatively charged biomolecules. In addition, radiofrequency (RF) sensing parameters such as the transconductance gain and the cutoff frequency are taken into account to provide further insight into the sensitivity of the proposed device. Furthermore, the linearity, distortion, and noise immunity of the device are evaluated to confirm the overall performance of the biosensor at high (GHz) frequency. The results indicate that the proposed biosensor exhibits a S Vth value of 0.68 for positively charged biomolecules at a very low drain bias of 0.2 V. The proposed device can thus be used as an alternative to conventional FET-based biosensors.
Due to limitations of Silicon, Transition metal dichalcogenides (TMD) based biosensors are popula... more Due to limitations of Silicon, Transition metal dichalcogenides (TMD) based biosensors are popular in the recent times. In TMD family, Molybdenum telluride (MoTe2) is being studied a lot for different biosensing application. However, for DNA detection using TMD based DMFET, the effect of the electrical variations in DNA has not been studied before. Also, the impact of DNA-Electrode interaction on transducer level of DMFET is yet to be studied. In this article, we have proposed a Molybdenum telluride (MoTe2) based Accumulation Mode Field Effect Transistor (AMFET) for possible dielectric modulated biosensing application. The study is focused on DNA detection including the electric variations of DNA due to surface interaction. We have done a circuit level analysis of the proposed structure for having deeper insights into its performance under various DNA orientations in the nanogap. We have also presented a benchmarking to highlight the superior sensitivity of the proposed structure (∆...
Superlattices and Microstructures, 2015
ABSTRACT
Proceedings of The 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC), 2014
2014 International Conference on Advances in Electrical Engineering (ICAEE), 2014
ABSTRACT
Environmental Science and Engineering, 2013
Journal of Computational Electronics
We propose and investigate a biosensor based on a transparent dielectric-modulated dual-trench ga... more We propose and investigate a biosensor based on a transparent dielectric-modulated dual-trench gate-engineered metaloxide-semiconductor field-effect transistor (DM DT GE-MOSFET) for label-free detection of biomolecules with enhanced sensitivity and efficiency. Various sensing parameters such as the I ON /I OFF ratio and the threshold voltage shift are evaluated as metrics to validate the proposed sensing device. Additionally, S Vth (the V th sensitivity) is also analyzed, considering both positively and negatively charged biomolecules. In addition, radiofrequency (RF) sensing parameters such as the transconductance gain and the cutoff frequency are taken into account to provide further insight into the sensitivity of the proposed device. Furthermore, the linearity, distortion, and noise immunity of the device are evaluated to confirm the overall performance of the biosensor at high (GHz) frequency. The results indicate that the proposed biosensor exhibits a S Vth value of 0.68 for positively charged biomolecules at a very low drain bias of 0.2 V. The proposed device can thus be used as an alternative to conventional FET-based biosensors.
Due to limitations of Silicon, Transition metal dichalcogenides (TMD) based biosensors are popula... more Due to limitations of Silicon, Transition metal dichalcogenides (TMD) based biosensors are popular in the recent times. In TMD family, Molybdenum telluride (MoTe2) is being studied a lot for different biosensing application. However, for DNA detection using TMD based DMFET, the effect of the electrical variations in DNA has not been studied before. Also, the impact of DNA-Electrode interaction on transducer level of DMFET is yet to be studied. In this article, we have proposed a Molybdenum telluride (MoTe2) based Accumulation Mode Field Effect Transistor (AMFET) for possible dielectric modulated biosensing application. The study is focused on DNA detection including the electric variations of DNA due to surface interaction. We have done a circuit level analysis of the proposed structure for having deeper insights into its performance under various DNA orientations in the nanogap. We have also presented a benchmarking to highlight the superior sensitivity of the proposed structure (∆...
Superlattices and Microstructures, 2015
ABSTRACT
Proceedings of The 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC), 2014
2014 International Conference on Advances in Electrical Engineering (ICAEE), 2014
ABSTRACT
Environmental Science and Engineering, 2013