PtSe2 grown directly on polymer foil for use as a robust piezoresistive sensor

Boland, Conor S, Ó Coileáin, Cormac, Wagner, Stefan, McManus, John B, Cullen, Conor P, Lemme, M C, Duesberg, Georg S and McEvoy, Niall (2019) PtSe2 grown directly on polymer foil for use as a robust piezoresistive sensor. 2D Materials. ISSN 2053-1583

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Abstract

Robust strain gauges are fabricated by growing PtSe2 layers directly on top of flexible polyimide foils. These PtSe2 layers are grown by low-temperature, thermally-assisted conversion of predeposited Pt layers. Under applied flexure the PtSe2 layers show a decrease in electrical resistance signifying a negative gauge factor. The influence of the growth temperature and film thickness on the electromechanical properties of the PtSe2 layers is investigated. The best-performing strain gauges fabricated have a superior gauge factor to that of commercial metal-based strain gauges. Notably, the strain gauges offer good cyclability and are very robust, surviving repeated peel tests and immersion in water. Furthermore, preliminary results indicate that the stain gauges also show potential for high-frequency operation. This host of advantageous properties, combined with the possibility of further optimization and channel patterning, indicate that PtSe2 grown directly on polyimide holds great promise for future applications.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science
T Technology > TA Engineering (General). Civil engineering (General) > TA0401 Materials of engineering and construction. Mechanics of materials > TA0418.9.A-Z Materials of special composition or structure, A-Z > TA0418.9.N35 Nanostructured materials
Depositing User: Conor Boland
Date Deposited: 01 Aug 2019 08:39
Last Modified: 19 Jul 2020 01:00
URI: http://sro.sussex.ac.uk/id/eprint/85221

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