Structure and growth of ultrathin titanium oxide films on Ru(0001)

Männig, A.; Zhao, Zhuowen; Rosenthal, Dirk; Christmann, K.; Hoster, Harry E.; Rauscher, Hubert; Behm, R. J.

doi:10.1016/j.susc.2004.11.039

Cited by 39 publications

(49 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The clean Ru(0001) substrate was first oxidized in 5 × 10 −8 mbar of O 2 at 373 K for 6 min, which resulted in a (2 × 1)O/Ru(0001) structure 43,44 with an oxygen coverage of 0.5 ML. The oxygen ad-layer was used primarily to prevent intermixing of Si and Ru, as well as to facilitate the oxidation of Si ad-atoms.…”

Section: Resultsmentioning

confidence: 99%

Tuning the electronic structure of ultrathin crystalline silica films on Ru(0001)

et al. 2012

View full text Add to dashboard Cite

A combination of density functional theory calculations and photoelectron spectroscopy provides new insights into the atomistic picture of ultrathin silica films grown on Ru(0001). The silica film features a double-layer silicate sheet formed by corner-sharing [SiO 4 ] tetrahedra and is weakly bound to the Ru(0001) substrate. This allows oxygen atoms to reversibly adsorb directly on the metal surface underneath the silica film. We demonstrate that the amount of adsorbed oxygen can be reversibly varied by vacuum annealing and oxidation, which in turn result in gradual changes of the silica/Ru electronic states. This finding opens the possibility for tuning the electronic properties of oxide/metal systems without altering the thickness or the structure of an oxide overlayer.

show abstract

Section: Resultsmentioning

confidence: 99%

Tuning the electronic structure of ultrathin crystalline silica films on Ru(0001)

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Films have the invaluable advantage that they can be prepared in a very clean and electrically conductive fashion and, in addition, be grown by epitaxy in a certain desired crystallographic orientation forced by the lattice parameters of the host surface. In the recent literature there are some detailed reports on the growth and structure of thin titanium dioxide films grown on Ni, Pt, Mo, W, Ru and Re surfaces, [16,17,41,[63][64][65][66][67][68][69][70][71][72][73][74] which we consider in somewhat more detail below. Surface-analytical methods employed were, among others, LEED, Auger electron spectroscopy (AES), ion scattering, X-ray photoelectron spectroscopy (XPS), STM, surface X-ray diffraction and photoemission.…”

Section: (110) Oriented Rutile Thin Filmsmentioning

confidence: 99%

“…Titanium Dioxide on Ruthenium, Ru(0001): The (hcp) ruthenium (0001) surface has been chosen as a substrate for titania deposition, too. [73,74] In an early work, Badyal et al [73] used LEED, AES, XPS and CO adsorption/titration to characterise the Ru(0001)-TiO x interface with the motivation to model and quantify the SMSI phenomenon. [36,37] The TiO x films were prepared by controlled evaporation of Ti in an ambient atmosphere (p = 1 10 À6 Torr O 2 ); excessive oxygen chemisorbed on the Ti-free patches of the Ru(0001) surface could be removed by appropriate hydrogen exposure and off-reaction.…”

Section: (110) Oriented Rutile Thin Filmsmentioning

confidence: 99%

“…More recently, the TiO x -on-Ru(0001) system was revisited by Männig et al, [74] who focussed on both the structural and chemical properties of this system. Again, ultra-thin films (maximum thickness~3 ML) were prepared with the advantage that the initial stages of TiO x crystallite formation could be followed in some detail, especially by means of STM imaging.…”

Section: (110) Oriented Rutile Thin Filmsmentioning

confidence: 99%

See 1 more Smart Citation

Model Studies on CO Oxidation Catalyst Systems: Titania and Gold Nanoparticles

et al. 2010

View full text Add to dashboard Cite

The peculiar catalytic activity of Au-supported titanium dioxide surfaces in the CO oxidation reaction has been a focus of interest for more than twenty years. Herein, recent data concerning preparation and structural characterisation of planar catalyst model systems consisting of single-crystalline titania and/or gold nanoparticles deposited thereon is presented and reviewed. We first expand on the deposition and growth of TiO(2) films on selected metal host surfaces and then consider the deposition of Au nanoparticles on these surfaces, including information on their geometric and electronic structures. The second issue is the interaction of these materials with carbon monoxide (one of the essential ingredients of the CO oxidation reaction) which serves as a probe molecule and monitor of the chemical activity of the model catalyst samples. Concerted efforts relating the structural and chemical properties of the respective binary materials (titania support plus deposited gold) can help to tackle and finally resolve the still open problems concerning the high activity of Au-TiO(2) catalysts in the CO oxidation reaction.

show abstract

“…Single crystals and thin films: RhO 2 /Rh(111) [8], VO x /Rh(111) [18], FeO/Pt(111) [6], FeO/Ru(0001) [19], TiO 2 /Ru(0001) [20], FeO/Rh(111) [21]; Al 2 O 3 /Ni 3 Al [7] In these examples the superstructure periodicity ranges from 1.4 nm to 4.5 nm. The future expansion of this list will give us the freedom of tailoring the nanoblocks in size and the array spacing.…”

Section: Model and Discussionmentioning

confidence: 99%

Oxide templates for self-assembling arrays of metal nanoclusters

et al. 2006

View full text Add to dashboard Cite

It is widely accepted that self-assembling building blocks is one of the promising ways for engineering new materials. Recent years reveal substantial progress in fabricating colloidal particles, polymer blocks and supramolecular aggregates of organic molecules.Despite substantial progress in molecular self-assembly there is still a lack of simple blocks made of "solid matter" (e.g. metals, oxides etc.) with well-defined crystal structure and spatial order. Here we demonstrate that ordered arrays of metal nanoclusters can be fabricated by self-assembly on a wide range of oxide templates. These nano-templates are produced either by depositing an alien oxide film or by oxidizing a metal/metal oxide substrate.

show abstract

Structure and growth of ultrathin titanium oxide films on Ru(0001)

Cited by 39 publications

References 38 publications

Tuning the electronic structure of ultrathin crystalline silica films on Ru(0001)

Tuning the electronic structure of ultrathin crystalline silica films on Ru(0001)

Model Studies on CO Oxidation Catalyst Systems: Titania and Gold Nanoparticles

Oxide templates for self-assembling arrays of metal nanoclusters

Contact Info

Product

Resources

About