High-performance room-temperature conductometric Gas sensors: materials and strategies



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Vázquez López, Antonio and Bartolomé Vílchez, Javier and Cremades Rodríguez, Ana Isabel and Maestre Varea, David (2022) High-performance room-temperature conductometric Gas sensors: materials and strategies. Chemosensors, 10 (6). ISSN 2227-9040

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Official URL: http://dx.doi.org/10.3390/chemosensors10060227


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

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© 2022 by the authors. Licensee MDPI
This research was funded by the Spanish Ministry of Innovation and Technology and the Spanish Ministry of Economy through Project RTI2018-097195-B-100. This research received funding from the Comunidad de Madrid and Universidad Autónoma de Madrid under the V PRICIT program through the Project SI3/PJI/2021-00393.

Uncontrolled Keywords:Sensing performance; Conducting polymer; Indium oxide; Nanostructured materials; Oxygen-adsorption; Humidity sensors; Hybrid materials; N-type; SnO_2; Films; Room temperature; RT; Gas sensing; Chemiresistive; Conductometric; Conductive polymers; Metal oxides; Light activated; Heterojunctions; Morphology optimization; Sensing principles
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:73944
Deposited On:22 Jul 2022 16:11
Last Modified:03 Aug 2022 09:52

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