Title: Staggered heterojunctions-based tunnel-FET for application as a label-free biosensor

Authors: Avik Chakraborty; Debasis Singha; A. Sarkar

Addresses: Jalpaiguri Government Engineering College, Jalpaiguri, West Bengal, PIN-735102, India ' Surendranath Evening College, 24/2, Mahatma Gandhi Road, Kolkata, West Bengal 700009, India ' Maulana Abul Kalam Azad University of Technology, BF 142, Sector 1, Salt Lake City, Kolkata, West Bengal 700064, India

Abstract: In this work, on the basis of dielectric modulation, a heterojunction (HETJ) surrounding gate (SRG) tunnel field effect (TFET) biosensor has been proposed. Due to the presence of biomolecules having different dielectric constant in the nanogap region of the biosensor, sensing has been performed. The sensitivity of the biosensor has been indicated using the traditional change in threshold voltage as well as in terms of I_ON/I_OFF ratio. The results obtained from TCAD device simulation reveals that the proposed HETJ-based biosensor provides higher sensitivity as compared to other existing homojunction (HJ)-based biosensors.

Keywords: biosensor; heterojunction; tunnel FET; dielectric modulation; label free; surrounding gate.

DOI: 10.1504/IJNP.2018.092681

International Journal of Nanoparticles, 2018 Vol.10 No.1/2, pp.107 - 116

Received: 06 Jan 2018
Accepted: 12 Jan 2018
Published online: 27 Jun 2018 *

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