All Paper‐Based, Multilayered, Inkjet‐Printed Tactile Sensor in Wide Pressure Detection Range with High Sensitivity. Issue 2 (22nd August 2021)

• Record Type: Journal Article
• Authors: Lee, Taehoon; Kang, Yunsung; Kim, Kwanhun; Sim, Sangjun; Bae, Kyubin; Kwak, Yeunjun; Park, Wonkeun; Kim, Minhyeong; Kim, Jongbaeg
• Is Part Of: Advanced materials technologies. Volume 7:Issue 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-22
• Subjects: inkjet printing -- mulberry paper -- pressure sensor -- paper‐based tactile sensors -- wide pressure range; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202100428
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Paper has attracted considerable interest as a promising pressure‐sensing element owing to its foldability/bendability and deformability due to its high porosity. However, paper‐based tactile sensors reported hitherto cannot achieve high sensitivity and a wide sensing range simultaneously. In this study, a resistive tactile sensor using carbon nanotube‐ and silver nanoparticle‐printed mulberry paper as a pressure‐sensing element and electrodes, respectively, is developed. The rough surface and high inner porosity of mulberry paper induce a significant change in the contact area when a multilayer‐stacked structure is used, resulting in increased sensitivity to pressure. Moreover, the enhanced mechanical robustness of mulberry paper originating from the highly bonded network of long and thick fibers affords a wide pressure‐sensing range. The sensor exhibits a high sensitivity exceeding 1 kPa −1 in an applied pressure range of 0.05–900 kPa; this achievement has not been reported among paper‐based tactile sensors. Furthermore, the sensor exhibits a fast response/relaxation time, low detection limit, high resolution, high durability, and high flexibility. The advantages of the sensor afford several applications, including a crosstalk‐free pressure sensor array, a three‐axis pressure sensor, and wearable devices for measuring signals from a user. Abstract : Mulberry paper is used as a pressure‐sensing element in a resistive tactile sensor for the first time. Carbon nanotube (CNT)‐printed mulberry paper with a stacked structure allows a wide pressure‐sensing range with high sensitivity. The sensor achieves a high sensitivity exceeding 1 kPa −1 over a wide sensing range (0.05–900 kPa), surpassing the performance of previously reported paper‐based tactile sensors.