Graphene-based tattoo-like electronic skin attached to human skin and plants [Photo: Tsinghua University]
Chinese scientists have developed a graphene-based tattoo-like electronic skin that could function as a wearable device to monitor a person's health.
我國科學家研制了一種石墨烯紋身式電子皮膚,可用作穿戴設(shè)備來監(jiān)測健康狀況。
電子皮膚(electronic skin)是一種重要的生物醫(yī)學傳感器(biomedical sensor),要求器件擁有好的柔韌性和可伸縮性、高靈敏度(high sensitivity)、好的貼合度和舒適度。石墨烯(graphene)由于其出色的導電性和柔韌性(excellent conductivity and flexibility),是電子皮膚的理想材料。
通過將電子皮膚貼附在口罩、手腕、喉嚨、人中等多個位置分別實現(xiàn)對呼吸、心跳、語音(breathing, heartbeat and voice)等人體信號的測量。該項技術(shù)靈敏度更高,能耐受更高溫度(withstand high temperature),而且襯底超薄,沒有穿戴不適感。
除了測量皮膚表面的拉伸與壓縮,這種石墨烯的紋身還可以利用犧牲層工藝轉(zhuǎn)移到多種襯底上(the electronic skin is also transferable to other substrates),例如樹葉,絲綢等等。