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Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

Authors :
Hyun-Seok Jang
Ki Hoon Lee
Byung Hoon Kim
Source :
Nanomaterials, Vol 14, Iss 12, p 1000 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Many studies on flexible strain and pressure sensors have been reported due to growing interest in wearable devices for healthcare purposes. Here, we present flexible pressure and strain (motion) sensors prepared with only graphene oxide (GO) and commercial silk fabrics and yarns. The pressure sensors were fabricated by simply dipping the silk fabric into GO solution followed by applying a thermal treatment at 400 °C to obtain reduced GO (rGO). The pressure sensors were made from rGO-coated fabrics, which were stacked in three, five, and seven layers. A super-sensitivity of 2.58 × 103 kPa−1 at low pressure was observed in the seven-layer pressure sensor. The strain sensors were obtained from rGO-coated twisted silk yarns whose gauge factor was 0.307. Although this value is small or comparable to the values for other sensors, it is appropriate for motion sensing. The results of this study show a cost-effective and simple method for the fabrication of pressure and motion sensors with commercial silk and GO.

Details

Language :
English
ISSN :
20794991
Volume :
14
Issue :
12
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.bbeb70d37b0d486ba37037eab0b28296
Document Type :
article
Full Text :
https://doi.org/10.3390/nano14121000