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Authordc.contributor.authorDoll, Theodor 
Authordc.contributor.authorVelasco Vélez, Juan J. es_CL
Authordc.contributor.authorRosenthal, Dirk es_CL
Authordc.contributor.authorAvila, Jonathan es_CL
Authordc.contributor.authorFuenzalida Escobar, Víctor es_CL
Cita de ítemdc.identifier.citationChemPhysChem 2013, 14, 2505 – 2510en_US
Identifierdc.identifier.otherDOI: 10.1002/cphc.201201013
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractMicrochemical sensors and catalytic reactors make use of gases during adsorption in specific ways on selected materials. Fine-tuning is normally achieved by morphological control and material doping. The latter relates surface properties to the electronic structure of the bulk, and this suggests the possibility of electronic control. Although unusual for catalytic surfaces, such phenomena are sometimes reported for microsensors, but with little understanding of the underlying mechanisms. Herein, direct observation of the electroadsorptive effect by a combination of X-ray photoelectron spectroscopy and con-ductivity analysis on nanometre-thick semiconductor films on buried control electrodes is reported. For the SnO2/NO2 model system, NO3 surface species, which normally decay at the latest within minutes, can be kept stable for 1.5 h with a high coverage of 15% under appropriate electric fields. This includes uncharged states, too, and implies that nanoelectronic structures provide control over the predominant adsorbate conformation on exterior surfaces and thus opens the field for chemically reactive interfaces with in situ tunability.en_US
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Títulodc.titleDirect Observation of the Electroadsorptive Effect on Ultrathin Films for Microsensor and Catalytic-Surface Controlen_US
Document typedc.typeArtículo de revistaen_US

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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile