A novel approach towards molecular memory device in gate tunable structure of MoS2-graphene

Tripathi, R and Misra, A (2020) A novel approach towards molecular memory device in gate tunable structure of MoS2-graphene. In: Nano Research . (In Press)

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Abstract

Molecular interaction in two-dimensional (2D) van der Waals (vdW) interfaces has drawn tremendous attention for extraordinary materials characteristics. So far sensing characteristics of molecular interaction has been exploited extensively to reach the detection limit to a few parts-per-billion (ppb) of molecules and far less attention is given to the evolution of persistent current state due to the molecular exposure. Our study focuses on molecular memory operation of MoS2-graphene heterostructure based field effect transistor. Metastable resistance state of the device due to the external perturbation of molecules is tuned to get a nearly relaxation free current state at much lower molecular concentration of 10 ppb to facilitate non-volatile memory features for molecular memory operation. An ultrafast switching operation in milli-second order is achieved at room temperature for the fastest recovery obtained so far in any molecular sensor. The process is co-controlled both by molecular as well as external charge density. Figure not available: see fulltext. © 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Item Type:	Journal Article
Publication:	Nano Research
Publisher:	Tsinghua University
Additional Information:	copyright to this article belongs to Tsinghua University
Keywords:	Digital storage; Field effect transistors; Graphene; Layered semiconductors; Molecular interactions; Molecular structure; Molecules; Molybdenum compounds; Van der Waals forces, External perturbations; Molecular concentration; Molecular memory devices; Non-volatile memory; Persistent currents; Sensing characteristics; Two Dimensional (2 D); Ultrafast switching, Graphene transistors
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	28 Oct 2020 10:19
Last Modified:	28 Oct 2020 10:19
URI:	http://eprints.iisc.ac.in/id/eprint/67039

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