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3D Synergistical MXene/Reduced Graphene Oxide Aerogel for a Piezoresistive Sensor Yanan Ma,†,‡ Yang Yue,† Hang Zhang,† Feng Cheng,† Wanqiu Zhao,† Jiangyu Rao,† Shijun Luo,‡ Jie Wang,§ Xueliang Jiang,∥ Zhitian Liu,∥ Nishuang Liu,† and Yihua Gao*,† †
Center for Nanoscale Characterization & Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO), School of Physics, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan 430074, China ‡ School of Sciences, Hubei University of Automotive Technology, Shiyan 442002, China § Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China ∥ School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China S Supporting Information *
ABSTRACT: A piezoresistive sensor based on ultralight and superelastic aerogel is reported to fabricate MXene/ reduced graphene oxide (MX/rGO) hybrid 3D structures and utilize their pressure-sensitive characteristics. The MX/ rGO aerogel not only combines the rGO’s large specific surface area and the MXene’s (Ti3C2Tx) high conductivity but also exhibits rich porous structure, which leads to performance better than that of single-component rGO or MXene in terms of the pressure sensor. The large nanosheets of rGO can prevent the poor oxidization of MXene by wrapping MXene inside the aerogel. More importantly, the piezoresistive sensor based on the MX/ rGO aerogel shows extremely high sensitivity (22.56 kPa−1), fast response time (
