High Performance Humidity Fluctuation Sensor for Wearable Devices via a Bioinspired Atomic-Precise Tunable Graphene-Polymer Heterogeneous Sensing Junction
High Performance Humidity Fluctuation Sensor for Wearable Devices via a Bioinspired Atomic-Precise Tunable Graphene-Polymer Heterogeneous Sensing Junction
复制标题
通过仿生原子精确可调谐石墨烯聚合物异质传感结用于可穿戴设备的高性能湿度波动传感器
DOI：
10.1021/acs.chemmater.8b01587
复制
发表时间：
2018-07-10
影响因子：
8.6
通讯作者：
Chen, Tao
中科院分区：
文献类型：
--
作者：
He, Jiang;Xiao, Peng;Chen, Tao
对人体水分代谢动态信息的测量可以无创地为我们提供丰富的生物信息。这一概念受到传统水分传感器的灵敏度和响应速度之间的权衡的阻碍。在此，受自然生物中基于弱键相互作用的分子检测系统的启发，我们通过将合理厚度的传感材料限制在石墨烯纳米通道中，设计了一种可调石墨烯-聚合物异质纳米传感结的新概念。基于动态氢键的全新传感机制赋予传感器对较宽范围的相对湿度（RH）（从0%到97%）具有超过4个数量级的灵敏度，具有前所未有的快速响应（20 ms）和恢复时间（17 ms）几乎没有湿度滞后。该传感器的优点使我们能够真实的实时记录用户说话和呼吸时的湿度波动信息，既可以揭示语音特征，又可以准确地监测呼吸频率。重要的是，这种先进的传感器通过以非接触方式检测人体皮肤上最细微的RH波动，为准确可靠的生理和心理监测提供了新的机会。
Measurements of an individual's water metabolism dynamical information can provide us rich biological information in a noninvasive way. This concept is hindered by the trade-off between the sensitivity and responsive velocity of traditional moisture sensors. Herein, inspired by the molecular detecting system based on weak bond interactions in natural organisms, we designed a new concept of a tunable graphene-polymer heterogeneous nanosensing junction by confining a reasonable thickness sensing material into graphene nanochannels. The fundamentally new sensing mechanism based on dynamical hydrogen bonds endows the sensor with over 4 orders of magnitude sensitivity toward a wide range of relative humidity (RH) (from 0% to 97%) with unprecedented fast response (20ms) and recovery times (17ms) with little humidity hysteresis. The promising advantages of the sensor allow us to record humidity fluctuation information in real time during a user's speech and breath, which can both reveal the speech feature and monitor the respiration rate accurately. Importantly, this advanced sensor provides a new opportunity for accurate and reliable physiological and psychological monitoring by detecting the subtlest RH fluctuations on human skin in a noncontact way.