| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
 126 0 |
 SM ISO690:2012KOROTCHENKOV, Ghenadii, BRYNZARI, Vladimir, GOLOVANOV, Vyacheslav, CERNEAVSCHII, Anton, MATOLIN, Vladimir, TADD, Andrew R.. Acceptor-like behavior of reducing gases on the surface of n-type In 2 O 3. In: Applied Surface Science, 2004, vol. 227, pp. 122-131. ISSN 0169-4332. DOI: https://doi.org/10.1016/j.apsusc.2003.11.051 |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
  Applied Surface Science |
|
| Volumul 227 / 2004 / ISSN 0169-4332 | |
|
|
| DOI:https://doi.org/10.1016/j.apsusc.2003.11.051 | |
| Pag. 122-131 | |
| Rezumat | |
Studying gas sensing effects in n-In 2 O 3 films, we have observed the anomalous behavior of reducing gases such as CO and H 2 . At T oper < 250-300°C the decrease of In 2 O 3 film conductivity took place during the interactions with CO and H 2 . Such effect is specific for n-In 2 O 3 interactions with oxidizing gases. Acceptor-like behavior of conductivity has been observed in humid atmosphere only. The In 2 O 3 films were deposited by spray pyrolysis from InCl 3 -water solutions. Their thickness was varied between 20 and 400nm. The maximum of acceptor effect took place for In 2 O 3 films with minimal thickness and minimal grain size. The mechanism of CO and H 2 interactions with chemisorbed molecular oxygen has been proposed to explain of the observed effect. According to this model, the low temperature CO and H 2 oxidation by molecular oxygen is followed by accumulation of atomic oxygen forms (O) on the surface of In 2 O 3 . Water plays a role of catalyst in these reactions. Mechanism of such influence is connected with formation of intermediate complexes on the surface of In 2 O 3 . |
|
| Cuvinte-cheie Acceptor-like behavior, In 2 O 3, molecular oxygen, Reducing gases, thin films |
|
|
|
|
|
