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Issue 15, 2016

Graphene coated nonwoven fabrics as wearable sensors

Abstract

Wearable electronic devices are becoming increasingly popular. They can bring a tremendous impact to human life. Wearable sensors, a class of wearable electronic devices, have attracted considerable attention because of their importance in healthcare. In this study, graphene-based wearable sensors, which can be directly integrated into clothes or textile products, are fabricated by a simple and cost effective method. Non-woven fabric (NWF) is considered as a green and low cost textile material, and its properties can be engineered for specific functions, such as medical systems, clothing, filter and packaging. A piece of NWF was dipped into graphene oxide (GO) solution and then reduced in HI acid. The GO reduction was confirmed by both X-ray photoelectron spectra and scanning electron microscopy. In the final product, reduced GO sheets were evenly coated on the NWF surface. The as-prepared graphene-NWF (GNWF) sensors exhibited a negative gauge factor at small strain. The signal has good reproducibility in response to stretching, bending and pressure. The highest gauge factor is −7.1 at 1% strain, and the highest sensitivity is 0.057 kPa−1. The GNWF sensors are able to respond to a series of human motions with the differentiation of various degrees of motions, and it can monitor small scale motions such as pulse and respiration.

Graphical abstract: Graphene coated nonwoven fabrics as wearable sensors

Supplementary files

Article information

Article type
Paper
Submitted
25 Jan 2016
Accepted
08 Mar 2016
First published
08 Mar 2016

J. Mater. Chem. C, 2016,4, 3224-3230

Graphene coated nonwoven fabrics as wearable sensors

D. Du, P. Li and J. Ouyang, J. Mater. Chem. C, 2016, 4, 3224 DOI: 10.1039/C6TC00350H

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