High-performance flexible humidity sensor based on B-TiO2/ SnS2 nanoflowers for non-contact sensing and respiration detection

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2024-09-19 DOI:10.1016/j.surfin.2024.105136

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Abstract

The development of flexible humidity sensors is essential for the advancement of wearable devices and electronic skin. However, the process of preparing these sensors is typically complex, and they often suffer from poor stability and a limited sensing range, which fails to meet the requirements for practical applications. Here, we prepared SnS₂ with nanoflower morphology by hydrothermal method, and successfully prepared a high-performance flexible humidity sensor with a high response range (20-95 %) by compositing it with B-TiO₂ nanoparticles with oxygen defects after sodium borohydride reduction and coating it on a PET flexible substrate. This sensor demonstrates an exceptional response (753.2 at 90 % RH) in high humidity environments and exhibits rapid response (13 s) and recovery times (19 s). Moreover, the sensor accurately detects human breathing patterns and frequencies, making it suitable for non-contact sensing applications. This research offers valuable insights into the simplified preparation and advancement of flexible humidity sensors.

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基于 B-TiO2/ SnS2 纳米流的高性能柔性湿度传感器，用于非接触传感和呼吸检测

柔性湿度传感器的开发对于可穿戴设备和电子皮肤的发展至关重要。然而，这些传感器的制备过程通常比较复杂，而且往往存在稳定性差、传感范围有限等问题，无法满足实际应用的要求。在此，我们采用水热法制备了具有纳米花形态的 SnS2，并在硼氢化钠还原后将其与具有氧缺陷的 B-TiO2 纳米粒子复合，涂覆在 PET 柔性基底上，成功制备出了具有高响应范围（20%-95%）的高性能柔性湿度传感器。这种传感器在高湿度环境中的响应速度（753.2，相对湿度为 90%）非常快，响应时间（13 秒）和恢复时间（19 秒）也很快。此外，该传感器还能准确检测人体呼吸模式和频率，因此适用于非接触式传感应用。这项研究为简化柔性湿度传感器的制备和改进提供了宝贵的见解。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)