Markus Poetschke

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Graphene has a multitude of striking properties that make it an exceedingly attractive material for various applications, many of which will emerge over the next decade. However, one of the most promising applications lie in exploiting its peculiar electronic properties which are governed by its electrons obeying a linear dispersion relation. This leads to(More)
The growth velocity of platinum nanowires in an aqueous solution of K(2)PtCl(4) is investigated as a function of the metal complex concentration and temperature. The solution is specially prepared to provide mainly the neutral complex cis-[PtCl(2)(H(2)O)(2)] for growing nanowires by dielectrophoresis. The measured growth velocities indicate(More)
We developed a multiscale approach to explore the effective thermal conductivity of polycrystalline graphene sheets. By performing equilibrium molecular dynamics (EMD) simulations, the grain size effect on the thermal conductivity of ultra-fine grained polycrystalline graphene sheets is investigated. Our results reveal that the ultra-fine grained graphene(More)
2 Crystallinity of Electrochemically Assembled Platinum Nanowires 3 Alexander Nerowski,† Markus Poetschke,† Ulrich Wiesenhütter, Jürgen Nicolai, Ulana Cikalova, 4 Arezoo Dianat,† Artur Erbe, Jörg Opitz, Manfred Bobeth,† Larysa Baraban,*,† 5 and Gianaurelio Cuniberti†,‡ 6 †Institute for Materials Science and Max Bergmann Center of Biomaterials and ‡Center(More)
MM 46.1 Thu 10:15 H 1029 SiC formation in carbon nanotubes grown from permalloy catalyst particles — ∙Anja Kießling1, Darius Pohl1, Christine Täschner1, Rolf Erni2, Mark Hermann Rümmeli1, Ludwig Schultz1, and Bernd Rellinghaus1 — 1IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany — 2Electron Microscopy Center, Empa, Swiss Federal Laboratories for(More)
Telephone surveys have gained considerable importance in recent years. The present article describes advantages and drawbacks of this mode of data collection. Particular attention is devoted to a number of aspects involved: costs, computer-assisted fieldwork, response rates, special demands on sampling, use of incentives, survey participation and the role(More)
M. Poetschke,1 C. G. Rocha,1 L. E. F. Foa Torres,2 S. Roche,1,3,4 and G. Cuniberti1 1Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, D-01062 Dresden, Germany 2Instituto de Física Enrique Gaviola (CONICET) and FaMAF, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina 3CEA,(More)
Motivated by the analysis of electrochemical growth of metallic nanowires from solution, we studied ion fluxes near nanoelectrodes in a binary symmetric electrolyte on the basis of the modified Poisson-Nernst-Planck equations in the strongly nonlinear region at large applied ac voltage. For an approximate calculation of the electric field near the nanowire(More)
Here we present electrochemically grown ultrathin platinum nanowires and demonstrate that their morphology and crystalline structure can be tuned by the waveform of the alternating voltage applied to the microelectrodes. The structure of the nanowires was analyzed by scanning and transmission electron microscopy. The voltage signal, applied to grow the(More)
Telefonische Befragungen haben in den letzten Jahren zunehmende Bedeutung erlangt. Der Beitrag beschreibt Vor- und Nachteile dieser Erhebungsform. Besondere Beachtung finden der Kostenaspekt, die computergestützte Feldarbeit, die Ausschöpfung der Stichprobe, besondere Anforderungen an die Stichprobenziehung, die Wirkung von Incentives, Grundlagen der(More)