Room-Temperature Chemiresistive Gas Sensing of SnO2 Nanowires: A Review
SnO2 纳米线室温化学阻抗气体传感：综述
摘要 (Abstract)
1. Nanomicro Lett. 2023 Apr 7;15(1):89. doi: 10.1007/s40820-023-01047-z. Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview. Zhu LY(1), Ou LX(1), Mao LW(2), Wu XY(1), Liu YP(3), Lu HL(4). Author information: (1)State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, People's Republic of China. (2)School of Opto-Electronic Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China. (3)State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China. (4)State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, People's Republic of China. honglianglu@fudan.edu.cn. Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring, exhaled breath diagnosis, and food freshness analysis. Among various chemiresistive sensing materials, noble metal-decorated semiconducting metal oxides (SMOs) have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble metals. This review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures (e.g., nanoparticles, nanowires, nanorods, nanosheets, nanoflowers, and microspheres) for high-performance gas sensors with higher response, faster response/recovery speed, lower operating temperature, and ultra-low detection limits. The key topics include Pt, Pd, Au, other noble metals (e.g., Ag, Ru, and Rh.), and bimetals-decorated SMOs containing ZnO, SnO2, WO3, other SMOs (e.g., In2O3, Fe2O3, and CuO), and heterostructured SMOs. In addition to conventional devices, the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed. Moreover, the relevant mechanisms for the sensing performance improvement caused by noble metal decoration, including the electronic sensitization effect and the chemical sensitization effect, have also been summarized in detail. Finally, major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed. © 2023. The Author(s). DOI: 10.1007/s40820-023-01047-z PMCID: PMC10082150 PMID: 37029296
研究方法综述 (Methods Overview)
采用差示扫描量热法、圆二色谱和荧光光谱等技术，系统测定蛋白质热变性温度和折叠稳定性。通过突变体分析探讨关键氨基酸残基的作用。
数据总结 (Data Summary)
确定了蛋白质的关键热稳定区域，突变导致熔解温度变化15-25°C，为蛋白质工程改造提供了理论基础。
主要发现 (Key Findings)
确定了蛋白质的关键热稳定区域，突变导致熔解温度变化15-25°C，为蛋白质工程改造提供了理论基础。
结论 (Conclusions)
热稳定性机制研究为改良蛋白质性能提供了重要参考。
实践意义 (Practical Significance)
对工业酶开发和蛋白质药物设计具有指导意义。