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Defects-assisted piezoelectric response in liquid exfoliated MoS2nanosheets

Shakya, J and Gayathri, HN and Ghosh, A (2022) Defects-assisted piezoelectric response in liquid exfoliated MoS2nanosheets. In: Nanotechnology, 33 (7).

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Official URL: https://doi.org/10.1088/1361-6528/ac368b


MoS2 is an intrinsic piezoelectric material which offers applications such as energy harvesting, sensors, actuators, flexible electronics, energy storage and more. Surprisingly, there are not any suitable, yet economical methods that can produce quality nanosheets of MoS2 in large quantities, hence limiting the possibility of commercialisation of its applications. Here, we demonstrate controlled synthesis of highly crystalline MoS2 nanosheets via liquid phase exfoliation of bulk MoS2, following which we report piezoelectric response from the exfoliated nanosheets. The method of piezo force microscopy was employed to explore the piezo response in mono, bi, tri and multilayers of MoS2 nanosheets. The effective piezoelectric coefficient of MoS2 varies from 9.6 to 25.14 pm V-1. We attribute piezoelectric response in MoS2 nanosheets to the defects formed in it during the synthesis procedure. The presence of defects is confirmed by x-ray photoelectron spectroscopy. © 2021 IOP Publishing Ltd.

Item Type: Journal Article
Publication: Nanotechnology
Publisher: IOP Publishing Ltd
Additional Information: The copyright for this article belongs to Authors
Keywords: Crystallography; Defects; Energy harvesting; Flexible electronics; Layered semiconductors; Nanosheets; Piezoelectric actuators; Piezoelectricity; Sulfur compounds; X ray photoelectron spectroscopy, 2d material; Commercialisation; Controlled synthesis; Economical methods; Electronic energies; Energy harvesting sensors; ITS applications; Piezoelectric response; Piezoelectricity; Sensor/actuator, Molybdenum compounds
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 07 Jan 2022 07:01
Last Modified: 07 Jan 2022 07:01
URI: http://eprints.iisc.ac.in/id/eprint/70914

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