Multispecies-coadsorption-induced rapid preparation of graphene glass fiber fabric and applications in flexible pressure sensor
Kun Wang, Xiucai Sun, Shuting Cheng, Yi Cheng, Kewen Huang, Ruojuan Liu, Hao Yuan, Wenjuan Li, Fushun Liang, Yuyao Yang, Fan Yang, Kangyi Zheng, Zhiwei Liang, Ce Tu, Mengxiong Liu, M. Ma, Yunsong Ge, Muqiang Jian, Wan‐Jian Yin, Yue Qi, Zhongfan Liu
Abstract
Abstract Direct chemical vapor deposition (CVD) growth of graphene on dielectric/insulating materials is a promising strategy for subsequent transfer-free applications of graphene. However, graphene growth on noncatalytic substrates is faced with thorny issues, especially the limited growth rate, which severely hinders mass production and practical applications. Herein, graphene glass fiber fabric (GGFF) is developed by graphene CVD growth on glass fiber fabric. Dichloromethane is applied as a carbon precursor to accelerate graphene growth, which has a low decomposition energy barrier, and more importantly, the produced high-electronegativity Cl radical can enhance adsorption of active carbon species by Cl–CH 2 coadsorption and facilitate H detachment from graphene edges. Consequently, the growth rate is increased by ~3 orders of magnitude and carbon utilization by ~960-fold, compared with conventional methane precursor. The advantageous hierarchical conductive configuration of lightweight, flexible GGFF makes it an ultrasensitive pressure sensor for human motion and physiological monitoring, such as pulse and vocal signals.