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

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posted on 2023-06-09, 18:32 authored by Conor Boland, Cormac Ó Coileáin, Stefan Wagner, John B McManus, Conor P Cullen, M C Lemme, Georg S Duesberg, Niall McEvoy
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.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

2D Materials

ISSN

2053-1583

Publisher

IOP Publishing

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-08-01

First Open Access (FOA) Date

2020-07-19

First Compliant Deposit (FCD) Date

2019-07-30

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