Leaf-inspired homeostatic cellulose biosensors.
Leaf-inspired homeostatic cellulose biosensors.
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DOI：
10.1126/sciadv.abe7432
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发表时间：
2021-04
期刊：
影响因子：
13.6
通讯作者：
Lee SW
中科院分区：
文献类型：
--
作者：
Kim JY;Yun YJ;Jeong J;Kim CY;Müller KR;Lee SW
Sticky like a leaf: Cellulose biosensors accurately and continuously monitor bio-signals with a homeostatic sensor-skin interface. An incompatibility between skin homeostasis and existing biosensor interfaces inhibits long-term electrophysiological signal measurement. Inspired by the leaf homeostasis system, we developed the first homeostatic cellulose biosensor with functions of protection, sensation, self-regulation, and biosafety. Moreover, we find that a mesoporous cellulose membrane transforms into homeostatic material with properties that include high ion conductivity, excellent flexibility and stability, appropriate adhesion force, and self-healing effects when swollen in a saline solution. The proposed biosensor is found to maintain a stable skin-sensor interface through homeostasis even when challenged by various stresses, such as a dynamic environment, severe detachment, dense hair, sweat, and long-term measurement. Last, we demonstrate the high usability of our homeostatic biosensor for continuous and stable measurement of electrophysiological signals and give a showcase application in the field of brain-computer interfacing where the biosensors and machine learning together help to control real-time applications beyond the laboratory at unprecedented versatility.
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