Liquid metal based flexible strain-stress sensor is an electronic medical device that can accurately detect and respond to various strain and stress changes in the body, and it has become a highly sought-after research area in recent years. Many current-use rigid electrodes lack sufficient flexibility and durability, especially when applied to complex and dynamic environments, and may cause damage to the body. In contrast, the liquid metal based flexible strain-stress sensor simultaneously has the advantages of high electronic conductivity, stretchability, stability and biocompatibility. In this study, a high-performance flexible strain-stress sensor using gallium-indium alloy with excellent sensitivity and stability is developed by optimizing the liquid metal composition and sensor structure, which has a significant prospect and potential market in the fields of wearable electronics, human-machine interaction, and biomedical monitoring.
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