Enhancing the Interfacial Adhesion of a Ductile Gold Electrode with PDMS Using an Interlocking Structure for Applications in Temperature Sensors.

Shuai Shi, Penghao Zhao, Pan Yang, Le Zhao, Jingguang Yi, Zuohui Wang, Shihui Yu

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Article in Nanomaterials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Shuai ShiSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Penghao ZhaoSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Pan YangSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Le ZhaoSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Jingguang YiSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Zuohui WangSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Shihui YuSchool of Power and Electrical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China.

Funding

the Education Key Projects of Henan Provincial Department 23A430034the Education Key Projects of Henan Provincial Department 25B150019the Natural Science Foundation of Henan 232300420096the Natural Science Foundation of Henan 252300421812

6 · The paper itself

Abstract

The poor interfacial adhesion between ductile gold (Au) electrodes and polydimethylsiloxane (PDMS) substrates affects their application in flexible sensors. Here, a porous Au electrode is designed and combined with a flexible PDMS substrate to form a structure that embeds Au into the PDMS film, thereby enhancing the interfacial adhesion of the Au/PDMS electrode. The resistivity change of the Au/PDMS electrode is only 12.3% after 100 tape peeling trials. The resistance of the Au/PDMS electrode remains stable at the 30% strain level after 2000 tensile cycling tests. This feature is mainly attributed to the deformation buffering effect of the porous Au film. After 100 min of ultrasonic oscillation testing, the resistivity change of the Au/PDMS electrode remains stable. It is also shown that the Au/PDMS electrode has excellent interfacial adhesion properties, which is mainly attributed to the interlocking effect of the Au/PDMS electrode structure. In addition, the temperature coefficient of resistance (TCR) of the temperature sensor based on the Au/PDMS electrode is approximately 0.00320/°C and the sensor's sensitivity remains almost stable after 200 temperature measurement cycles. Au/PDMS electrodes have great potential for a wide range of applications in flexible electronics due to their excellent interfacial adhesion and electrical stability.

Indexed as

Au/PDMSembedded structureinterfacial adhesioninterlocking effecttemperature sensor

Identifiers

PMID40648708

DOI10.3390/nano15131001

PMCPMC12251063

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