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 23-nov-2024