材料科学
压力传感器
三元运算
复合数
电子皮肤
纳米技术
壳体(结构)
数码产品
液态金属
复合材料
机械工程
计算机科学
电气工程
工程类
程序设计语言
作者
Jinhao Zhang,Xin Wang,Zhiwei Yang,Jian Wang,Jiacheng Cao,Qian Chen,Shilong Yu,Jian Zhang,Tianwen Guo,Hai Li,Xiao Huang
标识
DOI:10.1021/acsami.3c14627
摘要
Eutectic gallium-indium alloy (EGaIn) is a biocompatible liquid metal, promising for wearable electronics. Through functionalization and formation of composites, EGaIn-based materials have shown potential in multifunctional sensing devices. Here, egg-shell EGaIn/Ag/ZnO ternary composite particles were prepared through an ultrasound-assisted displacement reaction combined with room-temperature hydrolysis. The composite was further constructed as a wearable sensor capable of both pressure and proximity detection. For pressure sensing, due to the decrease in the Young's modulus of the egg-shell structure and the presence of the electrical double layers between Ag and ZnO, which enriched surface charges, the sensor showed excellent sensitivity at low pressures (2.17 KPa-1, <0.4 KPa) and thus the ability to sense body movements. For proximity sensing, the composite sensor was able to detect approaching objects that were up to 20 cm away. By combining and fitting the sensing curves for both the touchless and touching modes, the extracted parameters were used to create fingerprints for different objects, demonstrating the great potential of our sensor in the differentiation and identification of unknown objects for future robotics and artificial intelligence.
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