6533b821fe1ef96bd127b78e
RESEARCH PRODUCT
Field-induced tip–sample oxygen transfer in scanning tunneling microscopy on TiO2(110) (1 1).
Sylvie BourgeoisPeter KrügerBruno DomenichiniM. Petukhovsubject
Scanning tunneling spectroscopyAnalytical chemistrychemistry.chemical_elementField evaporation02 engineering and technologyTungsten01 natural sciencesOxygenMolecular physicslaw.inventionTunnel effectlaw0103 physical sciencesMaterials Chemistry010306 general physicsScanning tunneling microscopyQuantum tunnellingTitanium oxideChemistryBiasingSurface structureSurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter PhysicsCrystallographic defectSurfaces Coatings and FilmsScanning tunneling microscope0210 nano-technologySurface defectsdescription
International audience; A study on the field-induced tip–surface oxygen transfer at room temperature and its influence on the tunneling conditions for stable STM imaging of the TiO2(110) (1 1) surface is reported. A simple model of field-induced transfer is applied to tungsten and platinum–iridium tips. The oxygen transition rates from the sample to the tip or from the tip to the sample depend on the oxygen desorption barriers formed at tunneling distance. For stable imaging the applied bias voltage has to balance the oxygen transfer probabilities in both directions. In the case of Pt/Ir tips, the tunneling conditions for images with clear evidence of bridging oxygen point defects have been established.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-07-01 |