High-throughput gas sensing screening of surface-doped In(2)O(3).
Identifieur interne : 007F76 ( Main/Exploration ); précédent : 007F75; suivant : 007F77High-throughput gas sensing screening of surface-doped In(2)O(3).
Auteurs : RBID : pubmed:17206832English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Indium.
- methods : Combinatorial Chemistry Techniques.
- Electric Impedance, Semiconductors.
Abstract
The effect of various surface doping elements on the electrical and gas sensing properties of indium(III) oxide thick films sensors was investigated by means of high-throughput impedance spectroscopy (HTIS). Some doping elements lead to changes in both the conductivity in air as well as in the gas sensing properties towards oxidizing (NO(2), NO) and reducing (H(2), CO, propene) gases. Correlations between the sensing and the electrical properties in reference atmosphere indicate that the effect of the doping elements can be ascribed to an influence on the oxidation state of the metal oxide surface rather that to an interaction with the respective testing gases. An equation for the description of the temperature-dependent conductivity in air and nitrogen is proposed to describe the oxidation state of the metal oxide surface taking into account sorption of oxygen. Furthermore, a model associating the sensing properties and the oxidation state of the surface layer of the metal oxide based on oxygen spillover from doping element particles to the metal oxide surface is introduced.
DOI: 10.1021/cc060044p
PubMed: 17206832
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">High-throughput gas sensing screening of surface-doped In(2)O(3).</title><author><name sortKey="Sanders, D" uniqKey="Sanders D">D Sanders</name><affiliation wicri:level="3"><nlm:affiliation>RWTH Aachen University, Institute of Inorganic Chemistry, D-52056 Aachen, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>RWTH Aachen University, Institute of Inorganic Chemistry, D-52056 Aachen</wicri:regionArea><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Aix-la-Chapelle</settlement></placeName></affiliation></author><author><name sortKey="Simon, U" uniqKey="Simon U">U Simon</name></author></titleStmt><publicationStmt><date when="????"><PubDate><MedlineDate>2007 Jan-Feb</MedlineDate></PubDate></date><idno type="doi">10.1021/cc060044p</idno><idno type="RBID">pubmed:17206832</idno><idno type="pmid">17206832</idno><idno type="wicri:Area/Main/Corpus">002923</idno><idno type="wicri:Area/Main/Curation">002923</idno><idno type="wicri:Area/Main/Exploration">007F76</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Combinatorial Chemistry Techniques (methods)</term><term>Electric Impedance</term><term>Indium (chemistry)</term><term>Semiconductors</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Indium</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Combinatorial Chemistry Techniques</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Electric Impedance</term><term>Semiconductors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The effect of various surface doping elements on the electrical and gas sensing properties of indium(III) oxide thick films sensors was investigated by means of high-throughput impedance spectroscopy (HTIS). Some doping elements lead to changes in both the conductivity in air as well as in the gas sensing properties towards oxidizing (NO(2), NO) and reducing (H(2), CO, propene) gases. Correlations between the sensing and the electrical properties in reference atmosphere indicate that the effect of the doping elements can be ascribed to an influence on the oxidation state of the metal oxide surface rather that to an interaction with the respective testing gases. An equation for the description of the temperature-dependent conductivity in air and nitrogen is proposed to describe the oxidation state of the metal oxide surface taking into account sorption of oxygen. Furthermore, a model associating the sensing properties and the oxidation state of the surface layer of the metal oxide based on oxygen spillover from doping element particles to the metal oxide surface is introduced.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">17206832</PMID><DateCreated><Year>2007</Year><Month>01</Month><Day>08</Day></DateCreated><DateCompleted><Year>2007</Year><Month>03</Month><Day>20</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1520-4766</ISSN><JournalIssue CitedMedium="Print"><Volume>9</Volume><Issue>1</Issue><PubDate><MedlineDate>2007 Jan-Feb</MedlineDate></PubDate></JournalIssue><Title>Journal of combinatorial chemistry</Title><ISOAbbreviation>J Comb Chem</ISOAbbreviation></Journal><ArticleTitle>High-throughput gas sensing screening of surface-doped In(2)O(3).</ArticleTitle><Pagination><MedlinePgn>53-61</MedlinePgn></Pagination><Abstract><AbstractText>The effect of various surface doping elements on the electrical and gas sensing properties of indium(III) oxide thick films sensors was investigated by means of high-throughput impedance spectroscopy (HTIS). Some doping elements lead to changes in both the conductivity in air as well as in the gas sensing properties towards oxidizing (NO(2), NO) and reducing (H(2), CO, propene) gases. Correlations between the sensing and the electrical properties in reference atmosphere indicate that the effect of the doping elements can be ascribed to an influence on the oxidation state of the metal oxide surface rather that to an interaction with the respective testing gases. An equation for the description of the temperature-dependent conductivity in air and nitrogen is proposed to describe the oxidation state of the metal oxide surface taking into account sorption of oxygen. 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