Incorporating Au nanoparticles into metal-organic framework for low humidity sensors
SENSORS AND ACTUATORS B-CHEMICAL(2024)
摘要
Locating high active metal species into idea support surface to form spatially integrated nanostructure is essential for the adsorption and excitation process of water molecules. In this work, we proposed a spatial confinement strategy through incorporating Au nanoparticles into metal-organic framework (MOF) to realize low humidity sensing detection. We found the porous nature of MOF-303 morphology can provide confined room to induce Au species accumulation around the high active hydrophilic pocket (composed by three mu 2-OH groups and two N (H)). In-situ Raman results further indicate the spatially-close Au species and hydrophilic pocket sites could synergistically promote chemical adsorption of water molecules and proton transfer processes. The as-fabricated Au@MOF-303 humidity sensor exhibits ultra-high response at low humidity condition (4345 Hz to 3.39 % RH), low humidity hysteresis (0.18 % RH), excellent repeatability and selectivity. Furthermore, the Au@MOF-303 sensor enables real-time monitoring of breathing signals attached to the surgical mask and the proximity of the fingertips.
更多查看译文
关键词
Metal-organic framework,Confinement strategy,Quartz crystal microbalance,Low humidity sensor,Respiratory monitoring
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要