Matatagui Cruz, DanielLópez Sánchez, JesúsPeña Moreno, ÁlvaroSerrano, AídaDel Campo, AdolfoRodríguez De La Fuente, ÓscarCarmona Tejero, NoemíNavarro Palma, ElenaMarín Palacios, María PilarHorrillo, María del Carmen2023-12-202023-12-202021Matatagui, D., López-Sánchez, J., Peña, A., Serrano, A., Del Campo, A., De La Fuente, O.R., Carmona, N., Navarro, E., Marín, P., Del Carmen Horrillo, M.: Ultrasensitive NO2 gas sensor with insignificant NH3-interference based on a few-layered mesoporous graphene. Sensors and Actuators B: Chemical. 335, 129657 (2021). https://doi.org/10.1016/j.snb.2021.12965710.1016/j.snb.2021.129657https://hdl.handle.net/20.500.14352/91643Few-layered mesoporous graphene (FLMG) is employed as a sensing material to develop an innovative and high-sensitivity room temperature NO_(2) sensor through a simple manufacturing process. For this purpose, sensing material is optimized at 100 min by a high-energy milling process where natural graphite is used as a precursor: it is an inexpensive, sustainable and suitable active material. The large number of defects created and the enhanced degree of mesoporosity produced during the milling process determine the physical principles of operation of the designed device. NO_(2) gas sensing tests reveal an improved and selective performance with a change in resistance of ∼16 % at 0.5 ppm under ultraviolet photo-activation, establishing a detection limit around ∼25 ppb. Interestingly, the response of the developed sensor to humidity is independent in the measured range (0–33 % relative humidity at 25 °C) and the dependency to the presence of NH3 is rather poor as well (∼1.5 % at 50 ppm).engjournal article0925-4005https://doi.org/10.1016/j.snb.2021.129657https://www.sciencedirect.com/science/article/pii/S0925400521002252open access538.9Sub-ppm sensitivityGas selectivityNO_(2) gas sensorsFew-layered mesoporous grapheneHigh-energy ball millingRaman-spectroscopyFísica de materiales2211 Física del Estado Sólido