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Article
Epidemiologie und Pathogenese der diabetischen Nierenerkrankung
DKD (diabetic kidney disease) beschreibt die renalen mikroangiopathischen Komplikationen des Diabetes mellitus (DM) und ist eine Hauptursache der erhöhten Morbidität und Mortalität von Patienten mit DM. Die aktue...
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Article
Steintherapie morgen und übermorgen
Operative Urologie und interventionelle Steintherapie sind in hohem Maße technisierte und technologiebasierte Disziplinen der modernen Chirurgie. In Deutschland können wir auf eine lange Tradition technischer ...
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Article
Open AccessMutations of IFT81, encoding an IFT-B core protein, as a rare cause of a ciliopathy
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Article
Interstitielle Nephritis
Die interstitielle Nephritis beschreibt entzündliche Krankheitsentitäten, die im Wesentlichen im tubulointerstitiellen Raum stattfinden. Auslöser für interstitielle Nephritiden sind Medikamente (z. B. Antibiot...
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Article
High Frequency Transport Properties of YBCO: Extrinsic Versus Intrinsic d-Wave Properties
In good superconducting YBCO films, the surface impedance Z(T,ω,B)=Zint(T,ωB)+Zres(T,ωB) is dominated for T T c/2 and B∼0 by intrinsic properties, which are difficult to improve. B...
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Article
Metal-Insulator Transition (MIT), Defects, and Percolative Transport in HTS
HTS as layered, doped Mott insulators close to the Metal-Insulator Transition (MIT) become insulating at 6.5 kΩ per CuO-plane at n L ≤ 1021/cm3 localized states. The MIT occurs exponentially around point defects ...
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Article
Corrosion and surface spectroscopies of high-temperature superconductors
Crucial spectroscopic high-temperature superconductor (HTS) information is based on surface methods, like scanning tunneling spectroscopy (STS) or angle-resolved photo-emission spectroscopy (ARPES). But, typic...
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Article
Pseudogap and Transport in HTS
Perpendicular transport is one of the key factors to HTS superconductivity, sampling the quasi-insulating blocking layer, separating the conducting CuO-planes, and driving the metal–insulator transition (MIT) ...
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Article
Charge transfer via interfaces, especially of nanoscale materials
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Article
Resonant Tunneling, Pseudo-Gap, and Charge Dynamics in Cuprate Superconductors
The quasi-two-dimensional, metallic conduction in the CuO2 planes and activated out-of-plane conduction seem typical for most of the cuprate superconductors. The counteraction of overlap and charging energies ΔU*...
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Article
Tunnel channels, spectroscopy and imaging in STM
φ/?≈5.1/nmfor a tunnel with barrier height φ≈1 eV are given for surfaces covered by water, air or vacuum. Despite the n=1,2,3 intermediate states and their charging, imaging down to atomic resolution is achiev...
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Article
YBa2Cu3O7-δ single crystals revisited: Scanning probe data on very pure samples grown in BaZrO3 crucibles
Cu3O7-δ (YBCO) single crystals grown in BaZrO3 crucibles by scanning and friction force microscopy (SFM, FFM) as well as by scanning tunneling microscopy (STM) and angle resolved X-ray photo-electron spectroscopy...
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Article
Nonlinear surface impedance in “low” and “high”T c superconductors
The degradation of the surface impedanceZ = R + iX with rf power is a principal limit for measurements and applications. Such nonlinearities occur for normal conducting cavities by heating or electron loading. Bu...
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Article
Resonant tunneling and perpendicular conduction in cuprate conductors with varying O-content
Anisotropy is inherent to layered cuprates with conduction mainly confined to the CuO2-planes, claimed to be the source of superconductivity. Resonant tunnel exchange for conduction parallel and perpendicular to ...
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Article
Temperature dependence of surface impedance Z(T, ω) and mean free paths I(T) of YBCO-superconductors
The surface impedance Z(T,ω) at 10 and 145 GHz and between 4 and 300 K is obtained experimentally. Z(Ta≤T≤Tc) is quantitatively fitted by the BCS theory with a mean free path I(T) increasing rapidely below Tc. Th...
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Article
Nucleation and growth of Ni-LIGA layers
The quality of a Ni-LIGA layer and its adhesion to TiO2 depend crucially on interface morphology and chemistry. The unique combination of ARXPS (angle resolved photo electron spectroscopy), STM (Scanning tunnel ...
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Article
Granular superconductors and their intrinsic and extrinsic surface impedance
High-frequency experiments depend sensitively on homogeneous and inhomogeneous “defects” in the normal and superconducting state. As homogeneous effects, the intrinsic scattering time is of great theoretical i...
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Article
Interface studies on magnetron-sputtered SnO2-films
Thin SnO2 films have been prepared for H2-gas sensor application by RF magnetron sputtering onto different SiO2 based glasses. ARXPS and sputter-AES measurements have been performed to evaluate the compounds at S...
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Article
ARXPS studies of SiO2-SiC interfaces and oxidation of 6H SiC single crystal Si-(001) and C-(001) surfaces
The main puzzle in oxidation of hexagonal SiC is the slower rate of the Si-terminated surface as compared to the C-terminated surface, which is blamed on an unknown interface compound. ARXPS is a unique method...
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Article
ARXPS-analysis and morphology of sputtered nanocrystalline TiC/SiC coatings
ARXPS (angle resolved X-ray photoelectron spectroscopy) measurements are used to obtain informations about surfaces and grain boundaries. Data acquired from nanocrystalline carbidic hard coatings have been emp...