Atomic force microscopy study of (001) SrTiO3 surfaces

Stäuble-Pümpin, B.; Ilge, B.; Matijasevic, V.; Scholte, P.M.L.O.; Steinfort, A.J.; Tuinstra, F.

doi:10.1016/s0039-6028(96)00897-7

Cited by 43 publications

(19 citation statements)

References 6 publications

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“…[2][3][4][5][6][7][8][9][10][11][12] The understanding and improving of molecule-surface linkages of organic molecules with oxide surfaces is an important step toward the development of, for example, dye-sensitizing devices and the catalysis of diverse organic reactions. 13,14 Many theoretical and experimental studies have been carried out for SrTiO 3 (001) surfaces with water as an adsorbate on perfect, stepped, or reduced surfaces in order to identify the catalytic active sites on the surface.…”

Section: Introductionmentioning

confidence: 99%

First-principles investigations of electronic and magnetic properties of SrTiO3(001) surfaces with adsorbed ethanol and acetone molecules

2011

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First-principles methods based on density functional theory are used to investigate the electronic and magnetic properties of molecular interaction of the TiO 2 terminated SrTiO 3 (100) surface with ethanol or acetone. Both the perfect surface and the surface with an oxygen or a titanium vacancy in the top layer are considered. Ethanol and acetone are preferentially adsorbed molecularly via their respective oxygen atom on top of the Ti atom on the perfect surface. In case of an oxygen vacancy the adsorption of ethanol or acetone occurs directly on top of the vacancy and does not significantly affect the magnetism caused by the vacancy. In the case of a titanium vacancy both adsorbates occupy positions above Ti atoms. During this adsorption process the ethanol molecule dissociates into a CH 3 CO radical and three hydrogen atoms. The latter form hydroxide bonds with three of the four dangling oxygen bonds around the Ti vacancy and any magnetic moment induced by the Ti vacancy is annihilated. Thus the ethanol and acetone have a different impact on the surface magnetism of the SrTiO 3 (100) surface.

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Section: Introductionmentioning

confidence: 99%

First-principles investigations of electronic and magnetic properties of SrTiO3(001) surfaces with adsorbed ethanol and acetone molecules

2011

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“…Strontium titanate (SrTiO 3 ) single crystals have been the subject of numerous investigations because of their relevance in sensor applications, photocatalysis, and as a substrate for high-T c superconductors [1,2,3,4,5]. SrTiO 3 crystallizes in the cubic perovskite structure with a lattice constant of 3.9 Å and formal ionic charges of Sr 2+ , Ti 4+ , and O 2-.…”

Section: Introductionmentioning

confidence: 99%

Nanostructures on La-doped SrTiO3 surfaces

et al. 2003

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SrTiO(3)(100) single crystals with high donor dopant concentrations (5 at% La) were annealed at 1000 degrees C for up to 150 h in ultrahigh vacuum (UHV). By applying scanning tunneling microscopy (STM) nanostructures are observed on top of the surface with typical diameters of 20 nm and typical heights of 8 nm. To characterize their electronic structure and chemical composition, the surface was analyzed by metastable impact electron spectroscopy (MIES), ultraviolet photoelectron spectroscopy (UPS), scanning tunneling spectroscopy (STS), and depth profiling Auger electron spectroscopy (AES). Investigations of the stoichiometry suggest that the secondary phases consist of LaTiO(3). We present a defect chemistry model which attempts to explain the observed effects.

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“…A possible explanation for the contrast is thought to lie in the variations in experimental procedures 68. This issue is convincingly addressed by Stä ble-Pü mpin et al72 who showed how O 3 annealing accelerated the surface reconstruction process brought about by UHV and O 2 anneals.…”

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confidence: 96%

Strontium titanate surfaces

Deak¹

2007

Materials Science and Technology

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Strontium titanate (SrTiO 3 ) is a perovskite material with a variety of useful yet complex surface structures. Recent studies of SrTiO 3 have revealed how surface treatment can give rise to multi-functional surfaces, with attributes ranging from blue-light emission and high electrical conductivity to photocatalytic activity and nanostructure self-assembly. Research encompassing the surface science of strontium titanate is reviewed which includes studies that utilise scanning tunnelling microscopy, atomic force microscopy, electron diffraction, surface spectroscopy and theoretical modelling techniques are critically reviewed. A series of investigations that characterise the structural and chemical environment of SrTiO 3 surfaces are outlined and discussed. Various issues regarding SrTiO 3 surfaces are examined, including near-surface chemistry, surface terminations and surface structure. Emphasis is put on the link between surface processing methods and properties. A rich variety of surface reconstructions and structures have been observed but few are well characterised. Future advances in understanding these surfaces will be accompanied by studies that apply these surfaces for engineering new systems on the nanoscale.

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Atomic force microscopy study of (001) SrTiO3 surfaces

Cited by 43 publications

References 6 publications

First-principles investigations of electronic and magnetic properties of SrTiO3(001) surfaces with adsorbed ethanol and acetone molecules

First-principles investigations of electronic and magnetic properties of SrTiO3(001) surfaces with adsorbed ethanol and acetone molecules

Nanostructures on La-doped SrTiO3 surfaces

Strontium titanate surfaces

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