RT info:eu-repo/semantics/article T1 Mesoscale organization of titania thin films enables oxygen sensing at room temperature A1 Rassu, Pietro A1 Malfatti, Luca A1 Carboni, Davide A1 Casula, Maria F. A1 Garroni, Sebastiano A1 Zampetti, Emiliano A1 Macagnano, Antonella A1 Bearzotti, Andrea A1 Innocenzi, Plinio K1 Materiales K1 Materials K1 Ensayos (Tecnología) K1 Testing AB The application of titania materials to gas sensing devices based on thin films are of limited utilitybecause they only operate at a high working temperature and exhibit in general a low sensitivity. Toovercome these constraints, a new type of oxygen sensor based on mesoporous titania thin filmsworking at room temperature under UV irradiation has been developed. The increased density of chargecarriers induced by the photoconductive effect, has been used to enhance the sensitivity of the thinoxide layers. Mesostructured titania films have been prepared via self-assembly and thermal processingto remove the organic template obtaining anatase nanocrystals. The mesoporous films show a strikingdecrease of the current in the presence of oxygen that acts as an electron scavenger. Mesoporoussamples exhibit a much higher response with respect to dense titania, due to the higher surface areaand the larger number of surface defects. PB Royal Society of Chemistry SN 2050-7526 YR 2017 FD 2017-12 LK http://hdl.handle.net/10259/5736 UL http://hdl.handle.net/10259/5736 LA eng NO RAS is acknowledged for funding this project through CRP 30 L.R. 7/2007 ‘‘Bando Capitale Umano ad Alta Qualificazione annualita` 2015’’. This work was partially supported by the project ‘‘Mi ADATTI E L’ABBATTI’’- INSTM-Regione Lombardia project INSTMRL6. DS Repositorio Institucional de la Universidad de Burgos RD 28-mar-2024