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Article
Structure of a model TiO2 photocatalytic interface
The interaction of water with TiO2 is crucial to many of its practical applications, including photocatalytic water splitting. Following the first demonstration of this phenomenon 40 years ago there have been num...
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Article
Initial corrosion observed on the atomic scale
Electrochemical corrosion creates problems for engineers, and destroys over 3% of the world's GDP. But decomposition processes can be useful too, for example in the formation of porous metals. For good or ill,...
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Article
X-ray standing wave investigations of Si dopant incorporation in GaN
The synchrotron radiation technique of x-ray standing waves (XSW), which allows to directly obtain structural and element-specific data, was successfully used for the investigation of the dopant site distribut...
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Article
Synchrotron X-ray diffraction study of SrRuO3/SrTiO3/SrRuO3 nano-sized heterostructures grown by laser MBE
Structural investigation using X-ray synchrotron radiation has been performed on SrRuO3/SrTiO3/SrRuO3 epitaxial heterostructures, with each constituent layer a few unit cell thick grown on (001) SrTiO3 substra...
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Chapter
Local Lattice Distortions in YBa2Cu3Oy: Do** Dependence
Do** dependence of the local lattice distortions in YBa2Cu3Oy: thin films epitaxially grown on SrTiO3 has been studied by polarized extended x-ray absorption fine structure (EXAFS). We find that the in-plane Cu...
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Article
Microscopic structure and structuring of perovskite surfaces and interfaces: SrTiO3, RBa2Cu3O7-δ
surfaces and bicrystal interfaces and the growth of YBa2Cu3O7-δ thin films on such substrates using scanning tunneling microscopy and X-ray diffraction. Proper annealing of SrTiO3 in oxygen and/or ultrahigh vacu...
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Article
Atomic Scale Engineering of SrTiO3 Single Crystal Surfaces and Bicrystal Boundaries for Epitaxial Growth of Oxide Thin Films
We introduce a new annealing procedure to prepare well defined surfaces of SrTiO3 single crystal and bicrystal substrates. Annealing SrTiO3 (001) substrates in oxygen and then in ultra high vacuum produces a unif...
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Article
Local lattice anomalies in underdoped YBa2Cu3O7-Σ probed by X-ray absorption fine structure
Temperature-dependent local lattice anomalies in underdoped YBa2Cu3O7-Σ are studied by extended X-ray absorption fine structure (EXAFS) in a fluorescence mode. The in-plane polarized Cu A^-EXAFS is measured on un...
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Article
A titanium-rich (111) surface of SrTiO3 single crystals by thermal annealing
A very smooth (111) titanium-rich surface was obtained by annealing SrTiO3 single crystals in UHV. The surface structure was investigated with SEM, STM and LEED and was found to consist of terraces, interrupted b...
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Article
Contributions of multipole terms to the photoelectric yield in X-ray standing-wave measurements
The influence of higher-order multipole terms in the photoelectron yield on the result of an X-ray Standing Wave (XSW) measurement is discussed. The contributions of dipole, quadrupole and octupole term are an...
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Chapter
Electrode-Electrolyte Interfaces Investigated with X-Ray Standing Waves: Cu(111)/Pb, Tl
We report on the results of the in-situ structural characterization of underpotential deposited TI and Pb on Cu(111) electrodes with x-ray standing waves. These measurements show that submonolayer amounts of T...
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Article
In-Plane Asymmetries on the Ge(111)-c(2×8) Surface Mapped with the Scanning Tunneling Microscope
We report on new experimental studies of the Ge(111)-c(2×8) reconstruction performed with low-energy electron diffraction. (LEED) and scanning tunneling microscopy (STM). Weak quarter-order reflections are pre...
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Article
Determination of lattice mismatch in NiSi2 overlayers on Si(111)
We determined the perpendicular overlayer mismatch for type A and type B NiSi2 samples of thicknesses ranging from about 200 to 1000 Å via bulk x-ray diffraction. An increase in the density of dislocations which ...
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Article
X-Ray standing wave analysis of bismuth implanted in Si(110)
Perfect crystal silicon samples implanted with 60 KeV Bi atoms along the [110] surface normal direction were analyzed with X-ray standing waves. Two reflection orders, (220) and (440) were used with synchrontr...