Search Results - "Tschöpe, A."

Grain size-dependent electrical conductivity of polycrystalline cerium oxide II: Space charge model by Tschöpe, A.

“…The effect of space charges along grain boundaries on the electrical conductivity of polycrystalline mixed ionic/electronic conductors (MIECs) was…”
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Grain size-dependent electrical conductivity of polycrystalline cerium oxide: I. Experiments by Tschöpe, A., Sommer, E., Birringer, R.

“…The electrical conductivity of polycrystalline cerium oxide was investigated in the nanometer and micrometer size range. Nanocrystalline samples of different…”
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Determination of the shear modulus of gelatine hydrogels by magnetization measurements using dispersed nickel nanorods as mechanical probes by Bender, P., Tschöpe, A., Birringer, R.

“…Ni nanorods are dispersed into gelatine gels and used as nanoprobes to estimate the shear modulus of the surrounding gel matrix by magnetization measurements…”
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Magnetization measurements reveal the local shear stiffness of hydrogels probed by ferromagnetic nanorods by Bender, P., Tschöpe, A., Birringer, R.

“…The local mechanical coupling of ferromagnetic nanorods in hydrogels was characterized by magnetization measurements. Nickel nanorods were synthesized by the…”
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Magnetic field dependent small-angle neutron scattering on a Co nanorod array: evidence for intraparticle spin misalignment by Günther, A., Bick, J.-P., Szary, P., Honecker, D., Dewhurst, C. D., Keiderling, U., Feoktystov, A. V., Tschöpe, A., Birringer, R., Michels, A.

“…The structural and magnetic properties of a cobalt nanorod array have been studied by means of magnetic field dependent small‐angle neutron scattering (SANS)…”
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The grain boundary effect in heavily doped cerium oxide by Tschöpe, A., Kilassonia, S., Birringer, R.

“…Microcrystalline cerium oxide ceramics, doped with Y, La or Gd in the concentration range between 0.1 and 27 at.% were prepared and their electrical…”
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Synthesis and characterization of uniaxial ferrogels with Ni nanorods as magnetic phase by Bender, P., Günther, A., Tschöpe, A., Birringer, R.

“…In the present study, the rotation of magnetic nanorods in a soft hydrogel matrix induced by a homogeneous magnetic field is investigated. Magnetic nanorods of…”
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Temperature-Programmed Reaction Spectroscopy of Ceria- and Cu/Ceria-Supported Oxide Catalyst by Zimmer, P., Tschöpe, A., Birringer, R.

“…The surface reduction and oxidation of nanocrystalline CeO2 and CuO/CeO2 was investigated by temperature-programmed reduction (TPR) and…”
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Angular dependence of coercivity and remanence of Ni nanowire arrays and its relevance to magnetoviscosity by Günther, A., Monz, S., Tschöpe, A., Birringer, R., Michels, A.

“…Ni nanowire arrays with varying wire dimensions (diameter d, length l) and center-to-center distances d CC were synthesized by pulsed electrodeposition of Ni…”
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Low temperature processing of dense nanocrystalline yttrium-doped cerium oxide ceramics by Markmann, J, Tschöpe, A, Birringer, R

“…Nanocrystalline cerium oxide ceramics of high homogeneity and nearly full density were prepared. The starting material was synthesized by the direct…”
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N2O Temperature-Programmed Oxidation and EXAFS Studies on the Dispersion of Copper in Ceria-Supported Nanocatalysts by Tschöpe, A, Markmann, J, Zimmer, P, Birringer, R, Chadwick

“…The dispersion of copper in ceria-supported catalysts was investigated. By variation of the copper loading in a series of Cu x Ce1 - x O2 - x samples, it was…”
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Grain-size-dependent thermopower of polycrystalline cerium oxide by Tschöpe, A, Kilassonia, S, Zapp, B, Birringer, R

“…The effect of grain boundaries on the defect chemistry of polycrystalline cerium oxide was investigated by measuring the thermopower of cerium oxide samples…”
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Emf Measurements on Nanocrystalline Copper-Doped Ceria by Knauth, P., Schwitzgebel, G., Tschöpe, A., Villain, S.

“…Mixed oxide samples of nanostructured CuxCe1−xO2−yof various composition were generated by (i) chemical precipitation and ball milling and (ii) inert gas…”
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Magnetic properties of isotropic and anisotropic CoFe2O4-based ferrogels and their application as torsional and rotational actuators by Monz, S, Tschöpe, A, Birringer, R

“…CoFe2O4-based ferrogels were prepared with both isotropic and anisotropic orientation of the magnetic anisotropy axis of the magnetic particles. In contrast to…”
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Magnetically enhanced fluidized‐bed electrodes – A promising reactor concept for bioelectrochemical syntheses by Abt, M., Tschöpe, A., Franzreb, M.

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Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide by Tschöpe, Andreas, Ying, Jackie Y., Tuller, Harry L.

“…Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in…”
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Thermodynamic stability of nanocrystalline palladium by Gärtner, F., Bormann, R., Birringer, R., Tschöpe, A.

“…We focus on the question whether an unrelaxed grain boundary structure exhibits a lower Gibbs energy state with respect to the relaxed grain boundary. For…”
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Redox Activity of Nonstoichiometric Cerium Oxide-Based Nanocrystalline Catalysts by Tschope, A., Liu, W., Flytzanistephanopoulos, M., Ying, J.Y.

“…Nonstoichiometric cerium oxide-based catalysts were investigated for SO 2 reduction by CO to elemental sulfur, CO oxidation, and complete methane oxidation…”
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Quantification of magneto-optically active nanorods and inactive aggregates in nickel nanorod colloids by Tschöpe, A., Krämer, F., Birster, K., Gratz, M., Birringer, R.

“…Nickel nanorods of sufficiently small size exhibit collinear ferromagnetic and optical anisotropy which allows the measurement of their field-dependent…”
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Oxyreduction studies on nanostructured cerium oxide by Tschöpe, A., Birringer, R.

“…The effect of high surface area in porous nanostructured cerium oxide on chemical equilibrium with oxygen gas phase was investigated. Nanostructured cerium…”
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