The geometric structure of intrinsic defects at TiO2(110) surfaces: an STM study

Fischer, Stefan; Munz, A.W.; Schierbaum, K.D.; Göpel, Wolfgang

doi:10.1016/0039-6028(95)00572-2

Cited by 134 publications

(121 citation statements)

References 30 publications

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“…Accordingly, it has been frequently studied by a variety of methods ranging from low-energy [42] and medium-energy electron diffraction [43] or X-ray diffraction [44] to scanning tunnelling microscopy. [21,[45][46][47][48] As shown in Figure 2, the unrelaxed (110) surface consists of rows of bridging oxygen atoms and rows of alternating fivefold coordinated titanium atoms. By appropriate argon-ion sputtering, the surface can also be prepared in the (1 2) reconstructed form.…”

Section: (110) Oriented Rutile Thin Filmsmentioning

confidence: 99%

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

et al. 2010

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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.

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Section: (110) Oriented Rutile Thin Filmsmentioning

confidence: 99%

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

et al. 2010

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“…48,250,251,252,253 Using this approach, the spatial distribution and number density of defects has been revealed, however, no information on their nature and electronic properties could be obtained. The first topographic images of undecorated point defects were obtained on the TiO 2 (110) surface, 254,255 although those sites were confused with hydrogen adatoms for a long time due to their similar appearance. 44,256 The final identification of the defects as oxygen vacancies came from water and oxygen adsorption experiments, which either led to an increasing number of H adatoms or to a decreasing concentration of O vacancies, respectively, and thus enabled the distinction of both species ( Fig.…”

Section: Defects In the Oxide Surfacementioning

confidence: 99%

Properties of oxide thin films and their adsorption behavior studied by scanning tunneling microscopy and conductance spectroscopy

Nilius

2009

Surface Science Reports

218

233

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The preparation of thin oxide films on metal supports is a versatile approach to explore the properties of oxide materials that are otherwise inaccessible to most surface science techniques due to their insulating nature. Although substantial progress has been made in the characterization of oxide surfaces with spatially averaging techniques, a local view is often essential to provide comprehensive understanding of such systems. The scanning tunneling microscope (STM) is a powerful tool to obtain atomic-scale information on the growth behavior of oxide films, the resulting surface morphology and defect structure.

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“…One first evident application of such a sensor is an STM tip operated as a three-phase boundary Schottky barrier device. [143]. Further explanations are given in the text.…”

Section: Scanning Probe Techniquesmentioning

confidence: 99%