An Ultrastable Ionic Chemiresistor Skin with an Intrinsically Stretchable Polymer Electrolyte
An Ultrastable Ionic Chemiresistor Skin with an Intrinsically Stretchable Polymer Electrolyte
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DOI：
10.1002/adma.201706851
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发表时间：
2018-05-17
影响因子：
29.4
通讯作者：
Jung, Hee-Tae
中科院分区：
文献类型：
--
作者：
Jin, Ming Liang;Park, Sangsik;Jung, Hee-Tae
本文描述了利用固有可拉伸热塑性聚氨酯电解质作为挥发性有机化合物（VOC）传感通道而设计的离子化学电阻表皮（ICS）的超稳定传感特性。观察到分层组装的聚合物电解质膜是非常均匀、透明和本质上可拉伸的。系统的实验和理论研究也表明，人工离子在聚氨酯基体中均匀分布，无需微尺度相分离，这是实现ICS器件高可靠性的必要条件。ICS对肺癌患者呼出气体中的代表性挥发性有机化合物（甲苯、己烷、丙醛、乙醇、丙酮等）具有高度的敏感性和稳定性。特别是，即使在长期储存或恶劣环境条件（相对湿度85%或温度100℃）或严重机械变形（弯曲至1 mm的曲率半径或拉伸应变100%）下，传感器也能完全工作，这可以成为实现人体自适应和皮肤附着的生物传感器平台的有效方法，用于日常使用和早期诊断。
Ultrastable sensing characteristics of the ionic chemiresistor skin (ICS) that is designed by using an intrinsically stretchable thermoplastic polyurethane electrolyte as a volatile organic compound (VOC) sensing channel are described. The hierarchically assembled polymer electrolyte film is observed to be very uniform, transparent, and intrinsically stretchable. Systematic experimental and theoretical studies also reveal that artificial ions are evenly distributed in polyurethane matrix without microscale phase separation, which is essential for implementing high reliability of the ICS devices. The ICS displays highly sensitive and stable sensing of representative VOCs (including toluene, hexane, propanal, ethanol, and acetone) that are found in the exhaled breath of lung cancer patients. In particular, the sensor is found to be fully operational even after being subjected to long-term storage or harsh environmental conditions (relative humidity of 85% or temperature of 100 degrees C) or severe mechanical deformation (bending to a radius of curvature of 1 mm, or stretching strain of 100%), which can be an effective method to realize a human-adaptive and skin-attachable biosensor platform for daily use and early diagnosis.