Wang Kun, Sun Xiucai, Cheng Shuting, Cheng Yi, Huang Kewen, Liu Ruojuan, Yuan Hao, Li Wenjuan, Liang Fushun, Yang Yuyao, Yang Fan, Zheng Kangyi, Liang Zhiwei, Tu Ce, Liu Mengxiong, Ma Mingyang, Ge Yunsong, Jian Muqiang, Yin Wanjian, Qi Yue, Liu Zhongfan
Centre for Nanochemistry, Beijing Science and Engineering Centre for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
Beijing Graphene Institute (BGI), Beijing, China.
Nat Commun. 2024 Jun 12;15(1):5040. doi: 10.1038/s41467-024-48958-y.
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 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.
在介电/绝缘材料上直接通过化学气相沉积（CVD）生长石墨烯是实现石墨烯后续免转移应用的一种有前景的策略。然而，在非催化衬底上生长石墨烯面临棘手的问题，尤其是生长速率有限，这严重阻碍了大规模生产和实际应用。在此，通过在玻璃纤维织物上进行石墨烯CVD生长制备了石墨烯玻璃纤维织物（GGFF）。二氯甲烷被用作碳前驱体以加速石墨烯生长，其具有较低的分解能垒，更重要的是，产生的高电负性Cl自由基可通过Cl-CH共吸附增强活性碳物种的吸附，并促进H从石墨烯边缘脱附。因此，与传统的甲烷前驱体相比，生长速率提高了约3个数量级，碳利用率提高了约960倍。轻质、柔性的GGFF具有有利的分级导电结构，使其成为用于人体运动和生理监测（如脉搏和声音信号）的超灵敏压力传感器。
