F. Kühn

Kinetic Monte Carlo simulations of surface reactions on supported nanoparticles: A novel approach and computer code

Lothar Kunz, F. Kühn, Olaf Deutschmann

So far most kinetic Monte Carlo (kMC) simulations of heterogeneously catalyzed gas phase reactions were limited to flat crystal surfaces. The newly developed program MoCKA (Monte Carlo Karlsruhe) combines graph-theoretical and lattice-based principles to be able to efficiently handle multiple lattices with …

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The entropy of water in swelling PGA/PAH polyelectrolyte multilayers

Raphael Zahn, Katrin R. Bickel, Tomaso Zambelli, Judith Reichenbach et autres

We investigated the thermodynamical properties of water exchanged in poly(l-glutamic acid)/poly(allylamine)hydrochloride (PGA/PAH) polyelectrolyte multilayers containing ferrocyanide. Oxidation/reduction of the ferrocyanide in the multilayer caused a reversible swelling/contraction of the film due to the uptake/release of counter ions and water. We used electrochemical …

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Progress of InGaN Light Emitting Diodes on SiC

Uwe Strauß, H.‐J. Lugauer, A. Weimar, J. Baur et autres

We present brightness improvements of blue InGaN chips on SiC substrates. Chip shape, performance of the contacts, high structural quality of the InGaN quantum well layers are essential for an optical output as high as 9.5 mW at 470 nm and 20 …

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Experimental and simulation study of the behaviour and operation modes of MSGC+GEM detectors

M. Ageron, A. Albert, T. Barvich, W. Worby Beaumont et autres

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Construction and performance of a micro-pattern stereo detector with two gas electron multipliers

T. Barvich, P. Blüm, M. Erdmann, M. Fahrer et autres

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Performance test of a micro-pattern stereo detector with two gas electron multipliers

T. Barvich, P. Blüm, M. Erdmann, M. Fahrer et autres

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Robustness test of a system of MSGC+GEM detectors at the cyclotron facility of the Paul Scherrer institute

M. Ageron, A. Albert, T. Barvich, W. Worby Beaumont et autres

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GaN-based lasers on SiC: influence of mirror reflectivity on L–I characteristics

V. Schwegler, Sven Schad, M. Scherer, M. Kamp et autres

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TESTING FOR LEAKAGE IN CONTAINERS FOR RADIOACTIVE MATERIAL

F. Kühn

> Some problems which arise in testing radioactive preparations in containers for leaks are discussed. Complete specifications for such tests were not yet available at the time the manuscript was finished. (auth)