Ultrafast-response/recovery capacitive humidity sensor based on arc-shaped hollow structure with nanocone arrays for human physiological signals monitoring
Ultrafast-response/recovery capacitive humidity sensor based on arc-shaped hollow structure with nanocone arrays for human physiological signals monitoring
复制标题
基于纳米锥阵列弧形中空结构的超快响应/恢复电容式湿度传感器用于人体生理信号监测
DOI：
10.1016/j.snb.2021.129637
复制
发表时间：
2021-02-16
影响因子：
8.4
通讯作者：
Wang, Cong
中科院分区：
文献类型：
--
作者：
Niu, Hongsen;Yue, Wenjing;Wang, Cong
柔性湿度传感器由于在医疗健康监测方面的应用前景而引起了广泛关注。到目前为止，通过简单且具有成本效益的方法实现具有超快响应/恢复和可控形态的器件仍然是一个严峻的挑战。在此，通过使用聚偏二氟乙烯-三氟乙烯[P(VDF-TrFE)]纳米锥阵列创建弧形空心结构，开发了一种高性能柔性电容式湿度传感器。特别是，提出了一种基于热压法和阳极氧化铝模板转移法相结合的简便方法，以实现形貌可控的纳米结构阵列的大规模制备。得益于开放的弧形中空结构和大面积的P(VDF-TrFE)纳米锥阵列，所提出的湿度传感器显示出一些显着的特征，例如超快响应/恢复时间（3.693/3.430 s）、长期稳定性（25天）、优异的弯曲稳定性（10,000次循环）、在一定温度范围（20-50℃）内对湿度的电容响应不受影响以及对湿度的高选择性。水蒸气。上述显着优势使得所提出的湿度传感器能够成功地用于提取多种生理信号，包括呼吸检测、皮肤非接触传感以及实时监测尿布润湿过程和皮肤湿度，这在许多疾病的预防和诊断中显示出巨大的潜在价值。
Flexible humidity sensors have attracted substantial attention due to the promising application in medical health monitoring. Up to now, the realization of such devices with ultrafast response/recovery and controllable morphology via a facile and cost-effective approach still remains a severe challenge. Herein, a high-performance flexible capacitive humidity sensor by creating the arc-shaped hollow structure with the poly(vinylidenefluorideco-trifluoroethylene) [P(VDF-TrFE)] nanocone arrays is developed. Particularly, a facile method based on combining the hot-pressing method and the anodized aluminum oxide template transfer method is proposed to realize the large-scale preparation of the nanostructure arrays with controllable morphology. Benefiting from the open arc-shaped hollow structure and the large-area P(VDF-TrFE) nanocone arrays, the proposed humidity sensor shows several conspicuous features, such as ultrafast response/recovery time (3.693/3.430 s), long-term stability (25 days), excellent bending stability (10,000 cycles), unaffected capacitance response to humidity in a certain temperature range (20-50?) and high selectivity toward water vapor. The above salient superiorities enable the proposed humidity sensor to be successfully utilized in extraction of a variety of physiological signals including breathing detection, skin noncontact sensing, and real-time monitoring of diaper wetting process and skin humidity, which reveals great potential value in prevention and diagnosis of many diseases.