Characterizing TiO2(110) surface states by their work function

DC FieldValueLanguage
dc.contributor.authorBorodin, Andriy
dc.contributor.authorReichling, Michael
dc.date.accessioned2021-12-23T15:56:55Z-
dc.date.available2021-12-23T15:56:55Z-
dc.date.issued2011
dc.identifier.issn14639076
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/2614-
dc.description.abstractThe unreconstructed TiO2(110) surface is prepared in well-defined states having different characteristic stoichiometries, namely reduced (r-TiO2, 6 to 9% surface vacancies), hydroxylated (h-TiO2, vacancies filled with OH), oxygen covered (ox-TiO2, oxygen adatoms on a stoichiometric surface) and quasi-stoichiometric (qs-TiO2, a stoichiometric surface with very few defects). The electronic structure and work function of these surfaces and transition states between them are investigated by ultraviolet photoelectron spectroscopy (UPS) and metastable impact electron spectroscopy (MIES). The character of the surface is associated with a specific value of the work function that varies from 4.9 eV for h-TiO2, 5.2 eV for r-TiO2, 5.35 eV for ox-TiO2 to 5.5 eV for qs-TiO2. We establish the method for an unambiguous characterization of TiO2(110) surface states solely based on the secondary electron emission characteristics. This is facilitated by analysing a weak electron emission below the nominal work function energy. The emission in the low energy cut-off region appears correlated with band gap emission found in UPS spectra and is attributed to localised electron emission through Ti3+(3d) states.
dc.description.sponsorshipCOST actionEuropean Cooperation in Science and Technology (COST); The authors are grateful to H.-P. Steinruck and A. L. Shluger for a discussion of the work on the occasion of the final meeting of the COST D41 action. Support from the COST action is gratefully acknowledged. We also acknowledge stimulating discussions with S. Wendt.
dc.language.isoen
dc.publisherROYAL SOC CHEMISTRY
dc.relation.ispartofPHYSICAL CHEMISTRY CHEMICAL PHYSICS
dc.subjectADSORPTION
dc.subjectATOMIC-STRUCTURE
dc.subjectChemistry
dc.subjectChemistry, Physical
dc.subjectGAP
dc.subjectH2O
dc.subjectHYDROGEN
dc.subjectIMPACT ELECTRON-SPECTROSCOPY
dc.subjectO-2
dc.subjectPhysics
dc.subjectPhysics, Atomic, Molecular & Chemical
dc.subjectRUTILE TIO2(110)
dc.subjectSTM
dc.subjectTIO2
dc.titleCharacterizing TiO2(110) surface states by their work function
dc.typejournal article
dc.identifier.doi10.1039/c0cp02835e
dc.identifier.isiISI:000293900400009
dc.description.volume13
dc.description.issue34
dc.description.startpage15442
dc.description.endpage15447
dc.contributor.orcid0000-0003-3186-9000
dc.contributor.researcheridB-1123-2011
dc.publisher.placeTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
dcterms.isPartOf.abbreviationPhys. Chem. Chem. Phys.
crisitem.author.deptUniversität Osnabrück-
crisitem.author.deptFB 04 - Physik-
crisitem.author.deptidfb04-
crisitem.author.orcid0000-0003-3186-9000-
crisitem.author.parentorgUniversität Osnabrück-
crisitem.author.netidBoAn001-
crisitem.author.netidReMi818-
Show simple item record

Page view(s)

6
Last Week
0
Last month
0
checked on Apr 14, 2024

Google ScholarTM

Check

Altmetric