vai_a_storia   vai_a_organizzazione   vai_a_sedi   vai_a_personale   Area Riservata
    English English Version  

Chemical Tuning versus Microstructure Features in Solid-State Gas Sensors: LaFe1-xGaxO3, a Case Study

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Natile M.M., Ponzoni A., Concina I., Glisenti A

Affiliazione Autori:  CNR-IENI, INSTM-Padova, via F. Marzolo 1, 35131 Padova, Italy; Dipartimento di Scienze Chimiche, Università di Padova, via F. Marzolo 1, 35131 Padova, Italy; CNR-INO Sensor Laboratory, via Branze 45, 25123 Brescia, Italy; Department of Information Engineering, University of Brescia, via Valotti 9, 25133 Brescia, Italy

Riassunto:  A simple and cheap wet chemical approach is exploited to synthesize LaFe1-xGaxO3 (x = 0-1) crystalline perovskites. Ga doping level deeply influences not only the microstructure, but also the iron chemical features and consequently the responses to external chemicals. Sensitivity toward gases (NO2, CO, and ethanol), in fact, is driven by both Fe/Ga ratio and iron oxidation states, which are demonstrated playing a role much stronger than morphological parameters, such as grain size and specific surface area, usually dominating the performances of metal oxide based gas sensors. Results highlight that sensing behavior is tunable within a large extent by a simple and effective modulation of the chemical composition, obtaining sensitivities comparable with state of the art perovskite based gas sensors.

Volume n.:  26 (4)      Pagine da: 1505  a: 1513
Ulteriori informazioni:  M.M.N. and A.G. warmly acknowledge Dr. A. Galenda (CNR-IENI, Padova) for his help in the synthesis. M.M.N. acknowledges Italian MIUR under the Projects FIRB RBPR05JH2P \"Rete ItalNanoNet\", FIRB RBAP114AMK \"RINAME\", and PRIN 20097 x 44S7\" \"Record\" for partial funding.
DOI: 10.1021/cm4018858

*Impact Factor della Rivista: (2014) 8.354   *Citazioni: 37
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

Riferimenti visionabili in IsiWeb of Knowledge: (solo per sottoscrittori)
Per visualizzare la scheda dell'articolo su IsiWeb: Clicca qui
Per visualizzare la scheda delle Citazioni dell'articolo su IsiWeb: Clicca qui

INO © Istituto Nazionale di Ottica - Largo Fermi 6, 50125 Firenze | Tel. 05523081 Fax 0552337755 - P.IVA 02118311006     P.E.C.    Info