Vázquez López, AntonioBartolomé Vílchez, JavierCremades Rodríguez, Ana IsabelMaestre Varea, David2023-06-222023-06-222022-062227-904010.3390/chemosensors10060227https://hdl.handle.net/20.500.14352/71827© 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.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 discussedengAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttp://dx.doi.org/10.3390/chemosensors10060227https://www.mdpi.com/open access538.9Sensing performanceConducting polymerIndium oxideNanostructured materialsOxygen-adsorptionHumidity sensorsHybrid materialsN-typeSnO_2FilmsRoom temperatureRTGas sensingChemiresistiveConductometricConductive polymersMetal oxidesLight activatedHeterojunctionsMorphology optimizationSensing principlesFísica de materialesFísica del estado sólido2211 Física del Estado Sólido