Low-Power Negative-Differential-Resistance Device for Sensing the Selective Protein via Supporter Molecule Engineeringopen access
- Authors
- Dastgeer, G[Dastgeer, Ghulam]; Nisar, S[Nisar, Sobia]; Shahzad, ZM[Shahzad, Zafar Muhammad]; Rasheed, A[Rasheed, Aamir]; Kim, DK[Kim, Deok-Kee]; Jaffery, SHA[Jaffery, Syed Hassan Abbas]; Wang, L[Wang, Liang]; Usman, M[Usman, Muhammad]; Eom, J[Eom, Jonghwa]
- Issue Date
- Jan-2023
- Publisher
- WILEY
- Keywords
- broken bandgap; negative differential resistance; selective protein detection; van der Waals heterostructure
- Citation
- ADVANCED SCIENCE, v.10, no.1
- Indexed
- SCOPUS
- Journal Title
- ADVANCED SCIENCE
- Volume
- 10
- Number
- 1
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/101904
- DOI
- 10.1002/advs.202204779
- ISSN
- 2198-3844
- Abstract
- Van der Waals (vdW) heterostructures composed of atomically thin two-dimensional (2D) materials have more potential than conventional metal-oxide semiconductors because of their tunable bandgaps, and sensitivities. The remarkable features of these amazing vdW heterostructures are leading to multi-functional logic devices, atomically thin photodetectors, and negative differential resistance (NDR) Esaki diodes. Here, an atomically thin vdW stacking composed of p-type black arsenic (b-As) and n-type tin disulfide (n-SnS2) to build a type-III (broken gap) heterojunction is introduced, leading to a negative differential resistance device. Charge transport through the NDR device is investigated under electrostatic gating to achieve a high peak-to-valley current ratio (PVCR), which improved from 2.8 to 4.6 when the temperature is lowered from 300 to 100 K. At various applied-biasing voltages, all conceivable tunneling mechanisms that regulate charge transport are elucidated. Furthermore, the real-time response of the NDR device is investigated at various streptavidin concentrations down to 1 pm, operating at a low biasing voltage. Such applications of NDR devices may lead to the development of cutting-edge electrical devices operating at low power that may be employed as biosensors to detect a variety of target DNA (e.g., ct-DNA) and protein (e.g., the spike protein associated with COVID-19).
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Collections - Graduate School > SKKU Advanced Institute of Nano Technology > 1. Journal Articles
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