INVESTIGADORES
ALDAO celso Manuel
artículos
Título:
NovelgassensorwithdualresponseunderCO(g)exposure:Optical and electricalstimuli
Autor/es:
M.A. PONCE; C.M. ALDAO
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2018 vol. 536 p. 280 - 288
ISSN:
0921-4526
Resumen:
In thiswork,alanthanum(La)dopedceria(CeO2) film, whichdepictedadualgassensingresponse(electric andoptical)forCO(g) detection, wasobtainedbythemicrowave-assistedhydrothermal(HAM)synthesis anddepositedbythescreen-printingtechnique,inordertopreventdeathsbyintoxicationwiththis life-threateninggas.AnelectricresponseunderCO(g) exposurewasobtained,alongwithanex-tremelyfastopticalresponseforatemperatureof380 °C, associatedwithCeþ4 reduction andvacancygeneration.Adirectopticalgapwasfoundtobearound2.31eVfromUV?Vis results,whichcorrespondsto atransitionfromvalencebandto4fstates.Duetotheanomalouselectronconfiguration ofceriumatoms with4felectronsinitsreducedstate,theyarelikelytopresentanelectricconductionbasedonthesmall polarontheorywithahoppingmechanismresponsibleforitsdualsensingresponsewithacomplete reversiblebehaviour.
