Solution-processed negative gauge factor PtSe2 strain sensors

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932180" target="_blank" >RIV/60461373:22310/25:43932180 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlehtml/2025/nr/d5nr01217a" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2025/nr/d5nr01217a</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5nr01217a" target="_blank" >10.1039/d5nr01217a</a>

Result language
angličtina
Original language name
Solution-processed negative gauge factor PtSe2 strain sensors
Original language description
We undertake electrochemical exfoliation of a 2D semiconductor platinum diselenide, PtSe2 and investigate the piezoresistance response of a solution-processed network. Due to the large PtSe2 aspect ratios, exceeding 300, we achieve conformal flake-to-flake junctions and good inter-flake electrical coupling. Our measured piezoresistive gauge factor is negative (-5.45), consistent with the intrinsic negative gauge factor of PtSe2. This negative network gauge factor implies that strain is transferred from the substrate to the nanosheets. However, detailed modelling shows that the strain transferred to the nanosheets is much smaller than the applied strain, showing that conformal junctions do not necessarily lead to good mechanical coupling between nanosheets. Our model implies that this gauge factor is consistent with a strain transfer efficiency of 8.5%. Our strain sensor also demonstrated a cyclic response for over 1000 cycles, enabling the sensor to be used in future flexible optoelectronics applications.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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