High‐Performance Pressure Sensors Based on Shaped Gel Droplet Arrays

Author:

Wang Zhenwu12ORCID,Cai Qianyu12,Lu Lutong1,Levkin Pavel A.12ORCID

Affiliation:

1. Institute of Biological and Chemical Systems‐Functional Molecular Systems (IBCS‐FMS), Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany

2. Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz‐Haber‐Weg 6 76131 Karlsruhe Germany

Abstract

AbstractPolymer gel‐based pressure sensors offer numerous advantages over traditional sensing technologies, including excellent conformability and integration into wearable devices. However, challenges persist in terms of their performance and manufacturing technology. In this study, a method for fabricating gel pressure sensors using a hydrophobic/hydrophilic patterned surface is introduced. By shaping and fine‐tuning the droplets of the polymer gel prepolymerization solution on the patterned surface, remarkable sensitivity improvements compared to unshaped hydrogels have been achieved. This also showcased the potential for tailoring gel pressure sensors to different applications. By optimizing the configuration of the sensor array, an uneven conductive gel array is fabricated, which exhibited a high sensitivity of 0.29 kPa−1 in the pressure range of 0–30 kPa, while maintaining a sensitivity of 0.13 kPa−1 from 30 kPa up to 100 kPa. Furthermore, the feasibility of using these sensors for human motion monitoring is explored and a conductive gel array for 2D force detection is successfully developed. This efficient and scalable fabrication method holds promise for advancing pressure sensor technology and offers exciting prospects for various industries and research fields.

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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