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Auflistung nach Schlagwort "Anisotropy"

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Anisotropic transport properties of graphene-based conductor materials

Slawig, Diana; Rizzi, Leo; Rothe, Tom; Schuster, Jörg; Tegenkamp, Christoph (Dordrecht [u.a.] : Springer Science + Business Media B.V, 2021)

We analyzed nanographite-based materials in a combined study including experimental analysis via 4-point probe STM and simulation to provide a complete picture of microscopic and macroscopic properties of the material. The ...
Comparison of modelled and measured tilted solar irradiance for photovoltaic applications

Mubarak, Riyad; Hofmann, Martin; Riechelmann, Stefan; Seckmeyer, Gunther (Basel : MDPI AG, 2017)

This work assesses the performance of five transposition models that estimate the global and diffuse solar irradiance on tilted planes based on the global horizontal irradiance. The modelled tilted irradiance values are ...
Description of the contract between a deterministic anisotropic tool surface and a workpiece subjected to plastic deformation

Rotarescu, M.-I. (London : SAGE Publications Ltd., 1998)

The finite element method offers an opportunity to obtain important information by simulating metal-forming processes. The description of the tool-workpiece interaction still remains a critical issue. The aim of this paper ...
Dry friction of microstructured polymer surfaces inspired by snake skin

Baum, Martina J.; Heepe, Lars; Fadeeva, Elena; Gorb, Stanislav N. (Frankfurt am Main : Beilstein-Institut zur Förderung der Chemischen Wissenschaften, 2014)

The microstructure investigated in this study was inspired by the anisotropic microornamentation of scales from the ventral body side of the California King Snake (Lampropeltis getula californiae). Frictional properties ...
Dynamics of ferrocene in molecular sieves probed by Mossbauer spectroscopy and nuclear resonant scattering

Asthalter, T.; Sergueev, I.; Van Bürck, U.; Wagner, F.E.; Härter, P.; Kornatowski, J.; Klingelhöfer, S.; Behrens, Peter (Bristol : IOP Publishing Ltd., 2010)

A detailed study on the slow dynamics of ferrocene in the unidimensional channels of the molecular sieves SSZ-24 and AlPO4-5 has been carried out, using Mössbauer spectroscopy (MS), nuclear forward scattering (NFS) and ...
Experimental setup to characterize flow-induced anisotropy of sheet metals

Gutknecht, F.; Gerstein, G.; Traphöner, H.; Clausmeyer, T.; Nürnberger, F. (Bristol : Institute of Physics Publishing, 2018)

For many metals, a transient variation of the yield stress can be observed when changing the orientation of a load-path. Such behavior affects the manufacturing process itself, e.g. by increasing forming forces, altered ...
Ferro-self-assembly: Magnetic and electrochemical adaptation of a multiresponsive zwitterionic metalloamphiphile showing a shape-hysteresis effect

Bitter, Stefan; Schlötter, Moritz; Schilling, Markus; Krumova, Marina; Polarz, Sebastian; Winter, Rainer F. (Cambridge : RSC, 2020)

Metallosurfactants are molecular compounds which combine the unique features of amphiphiles, like their capability of self-organization, with the peculiar properties of metal complexes like magnetism and a rich redox ...
Generation of ultrasmall nanostructures in oxide layers assisted by self-organization

Block, T.; Pfnür, Herbert (College Park, MD : American Institute of Physics, 2008)

We explored the structural limits of unconventional electron-beam lithography by directly writing with an electron beam into ultrathin SiO2 films. The obtained structures were analyzed by tunneling microscopy. The Auger ...
Humidity-mediated anisotropic proton conductivity through the 1d channels of co-mof-74

Javed, Ali; Strauss, Ina; Bunzen, Hana; Caro, Jürgen; Tiemann, Michael (Basel : MDPI AG, 2020)

Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure and morphology were characterized by scanning electron microscopy (SEM), IR, and Raman spectroscopy. The ...
Impact of different polyimide-based substrates on the soft magnetic properties of NiFe thin films

Rittinger, Johannes; Taptimthong, Piriya; Jogschies, Lisa; Wurz, Marc Christopher; Rissing, Lutz (Bellingham, Wash. : SPIE, 2015)

We investigated the impact of polymer substrates on the magnetic properties of soft magnetic thin films. Experiments were carried out to evaluate the performance of AMR (anisotropic magnetoresistive) sensors deposited on ...
Locally anisotropic cosmological systems in modified two measure and massive gravity theories

Vacaru, Sergiu I. (Singapur : World Scientific Publishing Co. Pte. Ltd., 2018)

We outline a geometric method of constructing generic off-diagonal and diagonal cosmological solutions of effective Einstein equations modeling modified gravity theories with two non-Riemannian volume forms and associated ...
Numerical and experimental investigations of the anisotropic transformation strains during martensitic transformation in a low alloy Cr-Mo steel 42CrMo4

Behrens, Bernd-Arno; Bouguecha, Anas; Bonk, Christian; Chugreev, Alexander (Amsterdam : Elsevier, 2017)

Hot forming as a coupled thermo-mechanical process comprises of numerous material phenomena with a corresponding impact on the material behavior during and after the forming process. Within the subsequent heat treatment, ...
Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

Clausmeyer, Till; van den Boogaard, Ton; Noman, Muhammad; Gershteyn, Grygoriy; Scharper, Mirko; Svendsen, Bob; Bargmann, Swantje (Heidelberg : Springer Verlag, 2011)

This work focuses on the modeling of the evolution of anisotropy induced by the development of the dislocation microstructure. A model formulated at the engineering scale in the context of classical metal plasticity and a ...
Properties and anisotropy behaviour of a nickel base alloy material produced by robot-based wire and arc additive manufacturing

Hassel, Thomas; Carstensen, Torben (Heidelberg : Springer, 2020)

In order to produce three-dimensional components from metals, a wide variety of processes exist. Laser processes combined with metal powders are frequently used and developed. Restrictive factors are the machine-related ...
Radiation and energetic analysis of nanofluid based volumetric absorbers for concentrated solar power

Eggers, Jan Rudolf; Lange, Eckart Matthias.; Kabelac, Stephan (Basel : MDPI AG, 2018)

Recently, several publications gave attention to nanofluid based solar absorber systems in which the solar radiation energy is directly absorbed in the volume of the fluid. This idea could provide advantages over conventionally ...
Scale dependency of anisotropic thermal conductivity of heterogeneous geomaterials

Li, Kai-Qi; Chen, Qi-Min; Chen, Guan (Berlin ; Heidelberg : Springer, 2024)

The precise determination of subsurface thermal properties is critical for ground-source heating systems. The geomaterials are inherently heterogeneous, and their thermal conductivity measured in laboratory and field tests ...
Spin-orbit coupling and anisotropy of spin splitting in quantum dots

Könemann, J.; Haug, Rolf J.; Maude, D.K.; Fal'Ko, V.I.; Altshuler, B.L. (College Park, MD : American Physical Society, 2005)

In lateral quantum dots, the combined effect of both Dresselhaus and Bychkov-Rashba spin-orbit coupling is equivalent to an effective magnetic field ±BSO which has the opposite sign for sz=±1/2 spin electrons. When the ...
Structural, vibrational and electronic properties of SnMBO4 (M = Al, Ga): A predictive hybrid DFT study

Curti, Mariano; Mendive, Cecilia B.; Bredow, Thomas; Mangir, Murshed, M.; Gesing, Thorsten M. (Bristol : Institute of Physics Publishing, 2019)

We propose two new members of the mullite-type family, SnAlBO4 and SnGaBO4, and carry out an in-depth study of their crystal properties using the hybrid method PW1PW. Both are isostructural to PbMBO4 (M = Fe, Mn, Al, Ga), ...
Switching between one and two dimensions: Conductivity of Pb-induced chain structures on Si(557)

Tegenkamp, Christoph; Kallassy, Z.; Pfnür, Herbert; Günter, H.-L.; Zielasek, V.; Henzler, M. (College Park, MD : American Physical Society, 2005)

We show in a combined study of four-point conductance measurement and tunneling microscopy that surface state conductance induced by one monolayer of Pb on Si(557) can be quasi one dimensional with conductivity values close ...

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