High-Performance Room-Temperature Conductometric Gas Sensors: Materials and Strategies

Chemosensors

Javier Bartolomé¹  Antonio Vázquez-López²  David Maestre²  Ana Cremades² 

[1]Department of Applied Physics, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain

[2]Department of Materials Physics, Universidad Complutense de Madrid, Plaza Ciencias 1, 28040 Madrid, Spain

关键词: room temperature;    RT;    gas sensing;    chemiresistive;    chemresistive;    conductometric;   

DOI  :  10.3390/chemosensors10060227

来源: DOAJ

【 摘 要 】

Chemiresistive sensors have gained increasing interest in recent years due to the necessity of low-cost, effective, high-performance gas sensors to detect volatile organic compounds (VOC) and other harmful pollutants. While most of the gas sensing technologies rely on the use of high operation temperatures, which increase usage cost and decrease efficiency due to high power consumption, a particular subset of gas sensors can operate at room temperature (RT). Current approaches are aimed at the development of high-sensitivity and multiple-selectivity room-temperature sensors, where substantial research efforts have been conducted. However, fewer studies presents the specific mechanism of action on why those particular materials can work at room temperature and how to both enhance and optimize their RT performance. Herein, we present strategies to achieve RT gas sensing for various materials, such as metals and metal oxides (MOs), as well as some of the most promising candidates, such as polymers and hybrid composites. Finally, the future promising outlook on this technology is discussed.

【 授权许可】

Unknown