Flexible and multifunctional humidity sensor based on coral-like La2(WO4)3 for contactless healthcare monitoring

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-09-19 DOI:10.1016/j.surfin.2025.107702

Xiaobei Xu , Zhihua Zhao , Wei Jiang , Chao Qiu , Huiqin Li , Qilin Zou

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引用次数: 0

Abstract

This research successfully produced lanthanum tungstate (La₂(WO₄)₃) nanoparticles with a coral-like morphology through a hydrothermal synthesis approach, subsequently fabricating an innovative humidity detection device utilizing this nanostructured material. The crystalline phase structure and elemental composition of the material were systematically characterized by XRD and XPS, while its unique coral-like porous morphological features were revealed through SEM and TEM. The performance of the La₂(WO₄)₃ moisture-sensitive element was tested in detail at room temperature (25 °C). Benefiting from the material's distinctive three-dimensional porous structure, the sensor has exceptional humidity detection capabilities, including a wide detection range (11–95 % RH), high response value (212.5), fast response/recovery time (16 s/263 s), and excellent detection resolution (as low as 1 % RH relative humidity change). The sensor also shows good long-term stability and reproducibility. Notably, it offers advantages such as a simple fabrication process and low cost, making it highly promising for applications in environmental monitoring, medical diagnosis, aerospace, and high-precision measurement fields. In addition to creating a moisture-sensitive material with superior performance, this research offers new insights for the creation of humidity sensors with superior performance.

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基于珊瑚状La2(WO4)3的柔性多功能湿度传感器，用于非接触式医疗监测

本研究通过水热合成方法成功制备了具有珊瑚状形貌的钨酸镧（La2(WO4)3）纳米颗粒，并利用该纳米结构材料制作了一种创新的湿度检测装置。通过XRD和XPS对材料的晶相结构和元素组成进行了系统表征，并通过SEM和TEM揭示了材料独特的珊瑚状多孔形态特征。对La2(WO4)3湿敏元件在室温（25℃）下的性能进行了详细测试。得益于材料独特的三维多孔结构，该传感器具有卓越的湿度检测能力，包括宽检测范围（11 - 95% RH）、高响应值（212.5）、快速响应/恢复时间（16秒/263秒）和出色的检测分辨率（低至1% RH相对湿度变化）。该传感器具有良好的长期稳定性和重复性。值得注意的是，它具有制造工艺简单、成本低等优点，在环境监测、医疗诊断、航空航天和高精度测量等领域具有很大的应用前景。除了创造一种性能优越的湿度敏感材料外，这项研究还为制造性能优越的湿度传感器提供了新的见解。

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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)