21 Result(s)

Article

PVA/gelatin-based hydrogel coating of nickel-titanium alloy for improved tissue-implant interface

Nickel-titanium shape memory alloys have attracted notable interest for biomedical applications due to their unique properties. However, there are still some concerns on the potential release of nickel ions ca...

G. M. Simsek, J. Barthes, C. Muller, G. B. McGuinness, N. E. Vrana… in Applied Physics A (2021)

Article

Determination of Triaxial Residual Stress in Plasma-Sprayed Hydroxyapatite (HAp) Deposited on Titanium Substrate by X-ray Diffraction

Measurement of residual stress in plasma-sprayed coating is of key importance to optimize their microstructure and mechanical properties. In this study, the x-ray diffraction analysis was carried out using the...

N. Bosh, H. Mozaffari-Jovein, C. Müller in Journal of Thermal Spray Technology (2018)

Article

A non-noble Cr-Ni-based catalyst for the oxygen reduction reaction in alkaline polymer electrolyte fuel cells

We report on a new type of polymer electrolyte fuel cell based on a hydroxide ion conductive polymer combined with a non-noble chromium–nickel (Cr–Ni) catalyst for the oxygen reduction reaction (ORR). We study...

P. Faubert, I. Kondov, D. Qazzazie, O. Yurchenko, C. Müller in MRS Communications (2018)

Article

Morphology and oxygen vacancy investigation of strontium titanate-based photo electrochemical cells

In this paper single band gap photo electrochemical cells (PECs) are presented, which consist of strontium titanate (SrTiO₃) photo anodes on nickel cathodes in potassium hydroxide electrolyte. SrTiO₃ powders are ...

D. Hertkorn, M. Benkler, U. Gleißner, F. Büker, C. Megnin… in Journal of Materials Science (2015)

Article

Plasma nitriding of steels with severely plastic deformed surfaces

Linear Flow Splitting (LFS) is a new massive forming process, which enables the continuous production of integral bifurcated profiles with ultrafine-grained surface layers. Owing to the uniaxial material flow ...

J. Schuster, E. Bruder, C. Müller in Journal of Materials Science (2012)

Article

BSA adsorption on titanium: ToF-SIMS investigation of the surface coverage as a function of protein concentration and pH-value

The adsorption properties of bovine serum albumin (BSA) on pure titanium (99.99%+) were studied by time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). For this...

M. Wilhelmi, C. Müller, C. Ziegler, M. Kopnarski in Analytical and Bioanalytical Chemistry (2011)

Article

Rolled-up In(Ga)As/GaAs Nanotubes Diameter as a Function of Structural Properties

Inherently strained bilayers of In(Ga)As/GaAs, Epitaxially grown on top of an AlAs sacrificial buffer layer roll-up into free-standing nanotubes if they are released from their substrate by selective underetch...

Ch. Deneke, C. Müller, O. G. Schmidt in MRS Online Proceedings Library (2011)

Article

Interface Study of SiO₂/ HfO₂/SiO₂ Stacks Used as InterPoly Dielectric for Future Generations of Embedded Flash Memories

We have investigated the integration of Hf-based material as Inter Poly Dielectric in flash memories devices. Electrical measurements showed the good properties of SiO₂/HfO₂/SiO₂ stacks. We then interested to the...

A. Guiraud, N. Breil, M. Gros-Jean, D. Deleruyelle… in MRS Online Proceedings Library (2010)

Article

Fracture Toughness of Heat-Treated Superaustenitic Stainless Steels

Cast duplex and superaustenitic stainless steels are attractive alloys for applications that desire high strength and high corrosion resistance. Due to the large amounts of alloying additions present in these ...

C. Muller, L. Scott Chumbley in Journal of Materials Engineering and Performance (2010)

Article

Formation of ultrafine-grained microstructure in HSLA steel profiles by linear flow splitting

Linear flow splitting is a new cold forming process for the production of branched sheet metal structures in integral style. It induces extremely high deformation degrees without formation of cracks in the spl...

T. Bohn, E. Bruder, C. Müller in Journal of Materials Science (2008)

Article

Characterization of SiC and Si₃N₄ nanoparticles and their aqueous dispersions

Nanoparticles of SiC and Si₃N₄ were previously used to obtain electroless NiP/particles nanocomposites. The incorporation process was very different, depending on the particle: SiC tended to agglomerate and had a...

M. Sarret, C. Müller, A. Amell in Journal of Nanoparticle Research (2007)

Article

Two-Dimensional Superconducting Fluctuations in MgB₂ Films

The origin of the resistive transition broadening for superconducting MgB₂ films is investigated experimentally. The crucial role of two-dimensional weak and critical fluctuations is demonstrated.

A. S. Sidorenko, V. I. Zdravkov, V. V. Ryazanov, M. Klemm… in Journal of Superconductivity (2004)

Article

Photoconductivity in Oxygen Deficient La0.7 Pbx □0.3 − x MnO3 − δ Thin Films Prepared by Chemical Route

We report the influence of light irradiation on the electrical properties of oxygen deficient La_0.7Pb_x □_{0.3 − x} MnO_{3 − δ} thin films with (x = 0.1) and without (x = 0.3) cation vacancies (noted by □). Transient ph...

R. Cauro, R. Papiernik, A. Gilabert, Y. Girault… in Journal of Superconductivity (2001)

Article

A versatile plasma technique to improve plastic materials against gas and water-vapour permeation

Plasma-enhanced chemical deposition processes have been studied by comparing the performance of flexible diffusion barrier layers on plastic films produced in the same reactor. Under similar experimental condi...

E. M. Moser, C. Müller in Journal of Materials Science (1999)

Article

Cosegregation-Induced Epitaxial Growth of Two- and Three-Dimensional Compounds on Multicomponent Alloy Surfaces

In this contribution the cosegregation-induced epitaxial growth of two- and three-dimensional chromium nitrides on ferritic Fe-15%Cr-N(100) (C_N = 30 wt-ppm) single crystal surfaces will be discussed. The two-dime...

E. Clauberg, A. Dziakova, B. Eltester, L. Hammer… in MRS Online Proceedings Library (1998)

Article

Fatigue crack closure and crack growth behaviour in a titanium alloy with different microstructures

Fatigue crack closure and crack growth behaviour in Ti–2.5 wt % Cu alloy with two equiaxed and two lamellar microstructures have been investigated by constant-load amplitudetests. Plasticity-induced crack clos...

Sheng-HUI Wang, C. MÜLler in Journal of Materials Science (1998)

Article

Defect Distribution and Metastabhjty in Chalcopyrite Semiconductors

Deep levels in chalcopyrite based heteroj unctions are investigated by capacitance techniques. A method is presented which allows the determination of defect distributions from admittance measurements. For CuInSe

T. Walter, R. Herberholz, C. Müller, H.W. Schock in MRS Online Proceedings Library (1996)

Article

Sr_xBa_(1−x)TiO₃ Thin Films for Active Microwave Applications

The dielectric constant, loss tangent and Curie temperature for Sr_xBa_(1ȡx)TiO₃ (SBT) thin films with x = 0.2 − 0.8 have been investigated at microwave frequencies. SBT films (0.5 − 3 εm thick) were grown on (100)...

J. S. Horwitz, J. M. Pond, B. Tadayan, R. C. Y. Auyeung… in MRS Online Proceedings Library (1994)

Article

Therapeutic drug monitoring of Cyclosporin A (CsA). Comparison of the results after immunochemical (RIA, FPIA) and Chromatographic (HPLC) determination

W. Mraz, U. Behr, E. Sponer, C. Müller… in Fresenius' Zeitschrift für analytische Che… (1988)

Article

A general micro-ELISA design utilizing monoclonal antibodies: Application to assays for AFP and CEA

Although more laborious at first sight than commercial ELISA procedures, our assay system can compete with them even in terms of turn-around time: with simple microtitre equipment assay time is practically uni...

C. Müller, R. Moritz, E. Köttgen in Fresenius' Zeitschrift für analytische Chemie (1986)