Humidity-Responsive Gold Aerogel for Real-Time Monitoring of Human Breath,Langmuir

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Humidity-Responsive Gold Aerogel for Real-Time Monitoring of Human Breath
Langmuir ( IF 3.7 ) Pub Date : 2018-04-01 00:00:00 , DOI: 10.1021/acs.langmuir.8b00472
Israt Ali _{1,

2} , Liming Chen ₂ , Youju Huang _{1,

2,

3} , Liping Song _{1,

2} , Xuefei Lu ₁ , Baoqing Liu ₁ , Lei Zhang _{1,

2} , Jiawei Zhang _{1,

2} , Linxi Hou ₄ , Tao Chen _{1,

2}

Affiliation

Humidity sensors have received considerable attention in recent years because of their significance and wide applications in agriculture, industries, goods stores, and medical fields. However, the conventional humidity sensors usually possessed a complex sensing mechanism and low sensitivity and required a time-consuming, labor-intensive process. The exploration for an ideal sensing material to amplify the sensitivity of humidity sensors is still a big challenge. Herein, we developed a simple, low-cost, and scalable fabrication strategy to construct a highly sensitive humidity sensor based on polymer/gold nanoparticle (AuNP) hybrid materials. The hybrid polymer/AuNP aerogel was prepared by a simple freeze-drying method. By taking advantage of the conductivity of AuNPs and high surface area of the highly porous structure, the hybrid poly-N-isopropylacrylamide (PNIPAm)/AuNP aerogel showed high sensitivity to water molecules. Interestingly, the hybrid PNIPAm/AuNP aerogel-based humidity sensor can be used to detect human breath in different states, such as normal breath, fast breath, and deep breath, or in different individuals such as persons with illness, persons who are smoking, and persons who are normal, which is promising in practical flexible wearable devices for human health monitoring. In addition, the humidity sensor can be used in whistle tune recognition.

中文翻译：

湿度响应式金气凝胶，用于实时监测人的呼吸

近年来，由于湿度传感器的重要性及其在农业，工业，商品商店和医疗领域中的广泛应用，湿度传感器已引起了广泛的关注。然而，常规的湿度传感器通常具有复杂的感测机制和低灵敏度，并且需要耗时，费力的过程。寻找一种理想的传感材料来放大湿度传感器的灵敏度仍然是一个巨大的挑战。本文中，我们开发了一种简单，低成本且可扩展的制造策略，以基于聚合物/金纳米颗粒（AuNP）混合材料构建高灵敏度的湿度传感器。杂化聚合物/ AuNP气凝胶通过简单的冷冻干燥方法制备。通过利用AuNPs的电导率和高度多孔结构的高表面积，该杂化聚N-异丙基丙烯酰胺（PNIPAm）/ AuNP气凝胶显示出对水分子的高度敏感性。有趣的是，基于PNIPAm / AuNP气凝胶的混合湿度传感器可用于检测处于不同状态的人的呼吸，例如正常呼吸，快速呼吸和深呼吸，或用于不同的人，例如患病者，吸烟者，和正常人，这在用于人类健康监测的实用可穿戴设备中很有希望。此外，湿度传感器可用于口哨音识别。

更新日期：2018-04-01

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