Skin-Inspired Tactile Sensor on Cellulose Fiber Substrates with Interfacial Microstructure for Health Monitoring and Guitar Posture Feedback

Rajat Subhra Karmakar; Chia-Pei Chu; Chia-Lin Li; Chun-Hway Hsueh; Ying-Chih Liao; Yen-Wen Lu

doi:10.3390/bios13020174

journal article Open Access Jan 22, 2023

Skin-Inspired Tactile Sensor on Cellulose Fiber Substrates with Interfacial Microstructure for Health Monitoring and Guitar Posture Feedback

Rajat Subhra Karmakar Chia-Pei Chu Chia-Lin Li

Chun-Hway Hsueh

Ying-Chih Liao

Yen-Wen Lu

Biosensors Vol. 13 No. 2 pp. 174 · MDPI AG

View at Publisher Save 10.3390/bios13020174

Abstract

Skin-inspired flexible tactile sensors, with interfacial microstructure, are developed on cellulose fiber substrates for subtle pressure applications. Our device is made of two cellulose fiber substrates with conductive microscale structures, which emulate the randomly distributed spinosum in between the dermis and epidermis layers of the human skin. The microstructures not only permit a higher stress concentration at the tips but also generate electrical contact points and change contact resistance between the top and bottom substrates when the pressure is applied. Meanwhile, cellulose fibers possessing viscoelastic and biocompatible properties are utilized as substrates to mimic the dermis and epidermis layers of the skin. The electrical contact resistances (ECR) are then measured to quantify the tactile information. The microstructures and the substrate properties are studied to enhance the sensors’ sensitivity. A very high sensitivity (14.4 kPa−1) and fast recovery time (approx. 2.5 ms) are achieved in the subtle pressure range (approx. 0–0.05 kPa). The device can detect subtle pressures from the human body due to breathing patterns and voice activity showing its potential for healthcare. Further, the guitar strumming and chord progression of the players with different skill levels are assessed to monitor the muscle strain during guitar playing, showing its potential for posture feedback in playing guitar or another musical instrument.

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Details

Published: Jan 22, 2023
Vol/Issue: 13(2)
Pages: 174
License: View

Authors

R

Rajat Subhra Karmakar

Department of Biomechatronics Engineering, National Taiwan University, 10617 Taipei, Taiwan

C

Chia-Pei Chu

Department of Chemical Engineering, National Taiwan University, 10617 Taipei, Taiwan

C

Chia-Lin Li

Department of Materials Science and Engineering, National Taiwan University, 10617 Taipei, Taiwan

C

Chun-Hway Hsueh

Department of Materials Science and Engineering, National Taiwan University, 10617 Taipei, Taiwan

Y

Ying-Chih Liao

Department of Chemical Engineering, National Taiwan University, 10617 Taipei, Taiwan

Y

Yen-Wen Lu

Department of Biomechatronics Engineering, National Taiwan University, 10617 Taipei, Taiwan

Funding

National Science and Technology Council Award: MOST 110-2221-E-002-105-MY3

Cite This Article

Rajat Subhra Karmakar, Chia-Pei Chu, Chia-Lin Li, et al. (2023). Skin-Inspired Tactile Sensor on Cellulose Fiber Substrates with Interfacial Microstructure for Health Monitoring and Guitar Posture Feedback. Biosensors, 13(2), 174. https://doi.org/10.3390/bios13020174

Skin-Inspired Tactile Sensor on Cellulose Fiber Substrates with Interfacial Microstructure for Health Monitoring and Guitar Posture Feedback

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