Foot-scale MXene film of ultrathin electronic skin for wearable motion sensors
Junlin Ma, Kai Yang, Yu Jiang, Liuxue Shen, Hongting Ma, Wenrui Zhang, Jianxin Zhang, Nan Zhu
Abstract
Acquisition of large-area functional films is beneficial to the development of electronic skins (e-skins) in application of smart wearable sensors. Besides the excellent conductivity or mechanical properties of MXene, it is necessary to achieve controllable self-assembly of MXene film with large-scale for e-skins. Here, a versatile pH-induced oil-water (O/W) interfacial self-assembly engineering for fabrication of foot-level MXene film has been proposed, and as-prepared MXene film can be easily transferred onto various flexible substrates of glass plate, quartz plate, or polyethylene terephthalate (PET). Moreover, wearable ultrathin sensors based on foot-level MXene films can remotely monitor human activities (motion, physiological signals of pulse beating). Significantly, wearable e-skin enabled by foot-scale MXene film realizes effective capture of spatial information. Prospectively, pH-induced interfacial self-assembly of MXene provides an effective strategy for foot-scale two-dimensional films for wearable e-skin of motion sensors, which is promising for attractive wearable electronics in the future.