Title
Three-dimensional surface strain sensor based on PDMS/LIG composite film with adjustable electromechanical performance
Author
Yang, Huiru (Harbin Institute of Technology; Southern University of Science and Technology)
Huang, Qianming (Harbin Institute of Technology; Southern University of Science and Technology)
Wang, S. (TU Delft Bio-Electronics)
Zong, Qihang (Southern University of Science and Technology)
Tan, C. (TU Delft Electronic Components, Technology and Materials) 
Ye, H. (Southern University of Science and Technology)
Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials)
Date
2024
Abstract
Flexible strain sensors play a crucial role in health monitoring, smart wearable devices, and human–machine interaction. Three-dimensional surface evaluation methods for strain sensors offer advantages by being closer to actual strain, featuring a larger working range, and being more suitable for multidirectional strain. In this study, a three-dimensional (3D) surface strain sensor based on polydimethylsiloxane/laser-induced graphene (PDMS/LIG) composite films has been developed. The electromechanical properties of this sensor, encompassing 3D strain range and sensitivity, can be adjusted by manipulating laser parameters and LIG patterns. The key to attaining these specific characteristics lies in the intentional design of crack types and orientations on the sensor's surface. Remarkably, the line-vertical (LV) sensor exhibits outstanding sensitivity with a GF of 211.3. The line-parallel (LP) sensor achieves a GF of 115.1. Additionally, it demonstrates a stretching range of 25% and maintains stable performance over an extensive number of strain/release test cycles (more than 3000 cycles). With these advantages, the 3D strain sensor can not only be applied in human activity monitoring but also monitoring pressure within microchannels in microfluidic chips, suggesting promising applications in the health and medical fields.
Subject
3D surface sensing
Adjustable electromechanical performance
PDMS/LIG composite
Strain sensor
To reference this document use:
http://resolver.tudelft.nl/uuid:443b3cfc-7414-4d35-89c4-baef07af62b8
DOI
https://doi.org/10.1016/j.apsusc.2024.159885
Embargo date
2025-01-01
ISSN
0169-4332
Source
Applied Surface Science, 660
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Huiru Yang, Qianming Huang, S. Wang, Qihang Zong, C. Tan, H. Ye, Kouchi Zhang