摘要
Liquid metal(LM)exhibits a distinct combination of high electrical conductivity comparable to that of metals and exceptional deformability derived from its liquid state,thus it is considered a promising material for high-performance soft electronics.However,rapid patterning LM to achieve a sensory system with high sensitivity remains a challenge,mainly attributed to the poor rheological property and wettability.Here,we report a rheological modification strategy of LM and strain redistribution mechanics to simultaneously simplify the scalable manufacturing process and significantly enhance the sensitivity of LM sensors.By incorporating SiO_(2)particles into LM,the modulus,yield stress,and viscosity of the LM-SiO_(2)composite are drastically enhanced,enabling 3D printability on soft materials for stretchable electronics.The sensors based on printed LM-SiO_(2)composite show excellent mechanical flexibility,robustness,strain,and pressure sensing performances.Such sensors are integrated onto different locations of the human body for wearable applications.Furthermore,by integrating onto a tactile glove,the synergistic effect of strain and pressure sensing can decode the clenching posture and hitting strength in boxing training.When assisted by a deeplearning algorithm,this tactile glove can achieve recognition of the technical execution of boxing punches,such as jab,swing,uppercut,and combination punches,with 90.5%accuracy.This integrated multifunctional sensory system can find wide applications in smart sport-training,intelligent soft robotics,and human-machine interfaces.
基金
J.X.acknowledges financial support from the NSF,USA(CMMI-1762324)
Facebook.Y.Q.and H.W.acknowledge financial support from the National Natural Science Foundation of China(Grant no.12202388,11672269,11972323)
China Postdoctoral Science Foundation(Grant no.2022M710129,2023T160581)
Zhejiang Provincial Natural Science Foundation of China(Grant no.LQ22A020009,LR20A020002)
the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(Grant no.2023C01051).
