Chowdhury Silvia, Nugraha Asep Sugih, Yuliarto Brian, Yamauchi Yusuke, Kaneti Yusuf Valentino
Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia.
Advanced Functional Materials Laboratory, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia.
Small Methods. 2025 Jul;9(7):e2401808. doi: 10.1002/smtd.202401808. Epub 2025 May 12.
Metal‒organic frameworks (MOFs) are promising materials for advanced sensors because of their large surface area, high porosity, and compositional and structural versatility. The incorporation of a secondary metal center to form bimetallic MOFs can significantly enhance sensor performance by increasing the number of adsorption sites for gas molecules, enhancing charge transfer, and improving structural stability. Additionally, the tunable structure, composition, and porosity of bimetallic MOFs allow for the design of highly selective sensors tailored to specific gases. However, their low conductivity and thermal stability limit their application in traditional chemiresistive sensors. Instead, bimetallic MOFs are well suited for mass-sensitive gas sensors, such as quartz crystal microbalance (QCM) gas sensors, which operate at room temperature and rely on physical or chemical interactions. This review highlights recent advances in the exterior and interior nanoarchitectural control of bimetallic MOFs and their emerging applications in QCM sensors for various gas detection methods, along with the underlying sensing mechanisms. This study concludes with an overview of the challenges and future research directions in the synthesis and application of these materials for QCM gas sensors.
金属有机框架材料(MOFs)因其具有大的表面积、高孔隙率以及组成和结构的多样性,是用于先进传感器的有前景的材料。引入二级金属中心形成双金属MOFs,可以通过增加气体分子的吸附位点数量、增强电荷转移以及提高结构稳定性来显著提升传感器性能。此外,双金属MOFs可调节的结构、组成和孔隙率使得设计针对特定气体的高选择性传感器成为可能。然而,它们的低导电性和热稳定性限制了其在传统化学电阻式传感器中的应用。相反,双金属MOFs非常适合用于质量敏感型气体传感器,如石英晶体微天平(QCM)气体传感器,这类传感器在室温下工作,依靠物理或化学相互作用。本综述重点介绍了双金属MOFs在外部和内部纳米结构控制方面的最新进展及其在用于各种气体检测方法的QCM传感器中的新兴应用,以及潜在的传感机制。本研究最后概述了这些材料在QCM气体传感器合成和应用中面临的挑战及未来研究方向。
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