title: Fabrication of a flexible and conductive lyocell fabric decorated with graphene nanosheets as a stable electrode material.
abstract: Textile electrodes are highly desirable for wearable electronics as they offer light-weight, flexibility, cost effectiveness and ease of fabrication. Here, we propose the use of lyocell fabric as a flexible textile electrode because of its inherently super hydrophilic characteristics and increased moisture uptake. A highly concentrated colloidal solution of graphene oxide nanosheets (GONs) was coated on to lyocell fabric and was then reduced in to graphene nanosheets (GNs) using facile chemical reduction method. The proposed textile electrode has a very high surface conductivity with a very low value of surface resistance of only 40Ωsq(-1), importantly without use of any binding or adhesive material in the processing step. Atomic force spectroscopy (AFM) and Transmission electron microscopy (TEM) were conducted to study the topographical properties and sheet exfoliation of prepared GONs. The surface morphology, structural characterization and thermal stability of the fabricated textile electrode were studied by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), X ray photon spectroscopy (XPS), Raman spectroscopy, Wide angle X ray diffraction spectroscopy (WAXD) and Thermogravimetric analysis (TGA) respectively. These results suggest that the GONs is effectively adhered on to the lyocell fabric and the conversion of GONs in to GNs by chemical reduction has no adverse effect on the crystalline structure of textile substrate. The prepared graphene coated conductive lyocell fabric was found stable in water and electrolyte solution and it maintained nearly same surface electrical conductivity at various bending angles. The electrical resistance results suggest that this lyocell based textile electrode (L-GNs) is a promising candidate for flexible and wearable electronics and energy harvesting devices.
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors: Naveed
authors: N
authors: Mengal
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea; Mehran University of Engineering and Technology, Jamshoro, 76062, Pakistan.
authors: Iftikhar Ali
authors: IA
authors: Sahito
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea; Mehran University of Engineering and Technology, Jamshoro, 76062, Pakistan.
authors: Alvira Ayoub
authors: AA
authors: Arbab
authors: Department of Fuel Cell and Hydrogen Technology, Hanyang University, Seoul 133-791, Republic of Korea; Research Institute of Industrial Technology Convergence Technical Textile and Materials R&D Group, Korea Institute of Industrial Technology, Republic of Korea.
authors: Kyung Chul
authors: KC
authors: Sun
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors: Muhammad Bilal
authors: MB
authors: Qadir
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors: Anam Ali
authors: AA
authors: Memon
authors: Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea. Electronic address: shjeong@hanyang.ac.kr.
authors: Sung Hoon
authors: SH
authors: Jeong
keywords: Conductive; Electrode material; Flexible; Lyocell; Stable