@inproceedings{DuttaFlassigBestleetal., author = {Dutta, Amit Kumar and Flassig, Peter Michael and Bestle, Dieter and Keskin, Akin and Swoboda, Marius}, title = {Validierung optimierter Verdichterschaufeln mit Hilfe der 3D-CFD}, series = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, booktitle = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, publisher = {Dt. Ges. f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, pages = {1023 -- 1033}, language = {de} } @inproceedings{FlassigDuttaBestle, author = {Flassig, Peter Michael and Dutta, Amit Kumar and Bestle, Dieter}, title = {Robuste Auslegung von Verdichterschaufeln}, series = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, booktitle = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, publisher = {Dt. Ges. f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, pages = {1001 -- 1010}, language = {de} } @inproceedings{SommerFlassigDuttaetal., author = {Sommer, Lars and Flassig, Peter Michael and Dutta, Amit Kumar and Bestle, Dieter}, title = {Kr{\"u}mmungs-Nebenbedingungen in der aerodynamischen Mehrkriterien-Optimierung von Verdichterschaufelprofilen}, series = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, booktitle = {Deutscher Luft- und Raumfahrtkongress 2008, Darmstadt, 23. bis 25. September 2008, Bd. 2}, publisher = {Dt. Ges. f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, pages = {1011 -- 1022}, language = {de} } @inproceedings{DuttaFlassigBestle, author = {Dutta, Amit Kumar and Flassig, Peter Michael and Bestle, Dieter}, title = {Validation of Q3D-Blade Optimisation Results by 3D-CFD}, language = {en} } @inproceedings{FlassigDuttaBestle, author = {Flassig, Peter Michael and Dutta, Amit Kumar and Bestle, Dieter}, title = {Robustheit und Zuverl{\"a}ssigkeit in der aerodynamischen Verdichterauslegung}, language = {de} } @inproceedings{DuttaFlassigOttoetal., author = {Dutta, Amit Kumar and Flassig, Peter Michael and Otto, Dierk and Bestle, Dieter}, title = {Process Integration for Multidisciplinary Multi-objective Blade Design}, language = {en} } @inproceedings{KeskinSwobodaFlassigetal., author = {Keskin, Akin and Swoboda, Marius and Flassig, Peter Michael and Dutta, Amit Kumar and Bestle, Dieter}, title = {New Optimization Strategy for Rapid industrial Blade Design}, language = {en} } @inproceedings{FlassigBestle, author = {Flassig, Peter Michael and Bestle, Dieter}, title = {Probabilistische Studien zur robusten aerodynamischen Verdichterauslegung}, language = {de} } @inproceedings{SeifarthWilkeWalczyketal., author = {Seifarth, Olaf and Wilke, A. and Walczyk, Christian and Dabrowski, Jarek Marek and Zaumseil, Peter and Schmeißer, Dieter and M{\"u}ssig, Hans-Joachim and Schroeder, Thomas}, title = {Band gap and electronic structure determination with XAS and UPS of thin Pr-oxide films on Si(111)}, series = {Proceedings of 15th Workshop on Dielectrics in Microelectronics, Bad Saarow, 23 - 25 June 2008, Bad Saarow (Berlin)}, booktitle = {Proceedings of 15th Workshop on Dielectrics in Microelectronics, Bad Saarow, 23 - 25 June 2008, Bad Saarow (Berlin)}, pages = {285 -- 286}, language = {en} } @inproceedings{FlassigBestle, author = {Flassig, Peter Michael and Bestle, Dieter}, title = {Robust 2D Compressor Blading with respect to Measured Manufacturing Uncertainties}, language = {en} } @inproceedings{BestleFlassig, author = {Bestle, Dieter and Flassig, Peter Michael}, title = {Optimal Aerodynamic Compressor Blade Design Considering Manufacturing Noise}, language = {en} } @misc{DudekLupinaKozłowskietal., author = {Dudek, Piotr T. and Lupina, Grzegorz and Kozłowski, Grzegorz and Zaumseil, Peter and Bauer, Jakob and Fursenko, Oksana and Dabrowski, Jarek Marek and Schmidt, R. and Lippert, Gunther and M{\"u}ssig, Hans-Joachim and Schr{\"o}der, Thomas and Schmeißer, Dieter and Zschech, Ehrenfried}, title = {Atomic-scale engineering of future high-k dynamic random access memory dielectrics: The example of partial Hf substitution by Ti in BaHfO3}, series = {Journal of Vacuum Science and Technology / B}, volume = {29}, journal = {Journal of Vacuum Science and Technology / B}, number = {1}, issn = {2166-2754}, language = {en} } @inproceedings{GehrlichOhsiekKleinetal., author = {Gehrlich, Lukas and Ohsiek, Susanne and Klein, C. and Geiß, M. and Friedemann, Michael and K{\"u}cher, Peter and Schmeißer, Dieter}, title = {Ultrathin TaN/Ta barrier modifications to fullfill next technology node requirements}, series = {2011 IEEE International Interconnect Technology Conference and 2011 Materials for Advanced Metallization (IITC/MAM 2011), Dresden, Germany, 8 - 12 May 2011}, booktitle = {2011 IEEE International Interconnect Technology Conference and 2011 Materials for Advanced Metallization (IITC/MAM 2011), Dresden, Germany, 8 - 12 May 2011}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4577-0503-8}, doi = {10.1109/IITC.2011.5940322}, pages = {82 -- 84}, language = {en} } @inproceedings{BestleFlassigDutta, author = {Bestle, Dieter and Flassig, Peter Michael and Dutta, Amit Kumar}, title = {Robust Design of Compressor Blades in the Presence of Manufacturing Noise}, series = {9th European Conference on turbomachinery, fluid dynamics and thermodynamics, Conference Proceedings, Vol. 1}, booktitle = {9th European Conference on turbomachinery, fluid dynamics and thermodynamics, Conference Proceedings, Vol. 1}, editor = {Sen, M.}, isbn = {978-975-561-390-1}, pages = {1303 -- 1314}, language = {en} } @incollection{OsterriederWernerSimon, author = {Osterrieder, Peter and Werner, Dieter and Simon, Marc}, title = {Konzepte der Tragwerksplanung im Kraftwerksbau}, language = {de} } @misc{GerlichOhsiekKleinetal., author = {Gerlich, Lukas and Ohsiek, Susanne and Klein, Christoph and Geiß, Mario and Friedemann, Michael and K{\"u}cher, Peter and Schmeißer, Dieter}, title = {Interface engineering for the TaN/Ta barrier film deposition process to control Ta-crystal growth}, series = {Microelectronic Engineering}, volume = {Vol. 106}, journal = {Microelectronic Engineering}, doi = {10.1016/j.mee.2013.01.017}, pages = {63 -- 68}, abstract = {As a consequence of device shrinking the resistivity of the widely used TaN/Ta double barrier layer becomes an increasingly important parameter for device speed beyond the 32 nm technology node. In this study we describe the optimization of the deposition of TaN/Ta stacks in such a way that tantalum nitride layer thickness is minimized and tantalum grows in the favorable conducting alpha-phase. In the first part of the study we usedin situ ARXPS to investigate the growth of different tantalum nitride layers on SiO2 and SiOCH as a function of deposition time, nitrogen flow and deposition power. In the second part we analyzed the crystalline phase of a 20 nm thick tantalum layer deposited on top of the same series of tantalum nitride layers characterized in the growth study. The main findings are the appearance of tan-talum carbide and tantalum silicide as interface species for the deposition on SiOCH and only tantalum silicide for the deposition on SiO2. We found that alpha-tantalum grows preferably on tantalum carbide and nitrogen rich intermediate layers whereas silicide at the interface promotes the growth of beta-tantalum. To verify these findings we studied two additional modifications of the interface. A lower bias power for a deposition of tantalum nitride on SiO2 was used to confirm the role of tantalum silicide and a thermal treatment of a thin tantalum layer on SiOCH was applied to confirm the role of tantalum carbide. Finally, the contact resistance in via chains on patterned wafers for four selected processes showed the same trends as the sheet resistance of the corresponding barrier films on blanket wafer experiments.}, language = {en} } @inproceedings{PoehlmannBestleFlassigetal., author = {P{\"o}hlmann, Fiete and Bestle, Dieter and Flassig, Peter Michael and Hinz, Mich{\`e}l}, title = {Modular Automated Aerodynamic Compressor Design Process}, series = {Extended Abstracts Book, Evolutionary and Deterministic Methods for Design, Optimization and Control with Application to Industrial and Societal Problems, Las Palmas de Gran Canaria, 7.-9.10.2013}, booktitle = {Extended Abstracts Book, Evolutionary and Deterministic Methods for Design, Optimization and Control with Application to Industrial and Societal Problems, Las Palmas de Gran Canaria, 7.-9.10.2013}, editor = {Greiner, David and Galv{\´a}n, Blas and Periaux, Jacques and Gauger, Nicolas R. and Giannakoglou, Kyriakos C. and Winter, G.}, publisher = {Universidad de Las Palmas de Gran Canaria}, address = {Las Palmas de Gran Canaria}, isbn = {978-84-616-6249-4}, language = {en} } @misc{KrammHerrmannGeppertFiechteretal., author = {Kramm, Ulrike Ingrid and Herrmann-Geppert, Iris and Fiechter, Sebastian and Zehl, Gerald and Zizak, Ivo and Dorbandt, Iris and Schmeißer, Dieter and Bogdanoff, Peter}, title = {Effect of iron carbide formation on the number of active sites in Fe-N-C catalysts for the oxygen reduction reaction in acidic media}, series = {Journals of materials chemistry A}, journal = {Journals of materials chemistry A}, number = {8}, issn = {2050-7488}, doi = {10.1039/c3ta13821f}, pages = {2663 -- 2670}, language = {en} } @misc{KrammLefevreBogdanoffetal., author = {Kramm, Ulrike Ingrid and Lef{\`e}vre, Michel and Bogdanoff, Peter and Schmeißer, Dieter and Dodelet, Jean-Pol}, title = {Analyzing Structural Changes of Fe-N-C Cathode Catalysts in PEM Fuel Cell by M{\"o}ßbauer Spectroscopy of Complete Membrane-Electrode-Assemblies}, series = {The Journal of Physical Chemistry Letters}, volume = {2014}, journal = {The Journal of Physical Chemistry Letters}, number = {5}, issn = {1948-7185}, doi = {10.1021/jz501955g}, pages = {3750 -- 3756}, abstract = {The applicability of analyzing by M{\"o}ßbauer spectroscopy the structural changes of Fe-N-C catalysts that have been tested at the cathode of membrane electrode assemblies in proton exchange membrane (PEM) fuel cells is demonstrated. The M{\"o}ßbauer characterization of powders of the same catalysts was recently described in our previous publication. A possible change of the iron species upon testing in fuel cell was investigated here by M{\"o}ßbauer spectroscopy, energy-dispersive X-ray cross-sectional imaging, and neutron activation analysis. Our results show that the absorption probability of γ rays by the iron nuclei in Fe-N-C is strongly affected by the presence of Nafion and water content. A detailed investigation of the effect of an oxidizing treatment (1.2 V) of the non-noble cathode in PEM fuel cell indicates that the observed activity decay is mainly attributable to carbon oxidation causing a leaching of active iron sites hosted in the carbon matrix.}, language = {en} } @misc{IndraMenezesSahraieetal., author = {Indra, Arindam and Menezes, Prashanth W. and Sahraie, Nastaran Ranjbar and Bergmann, Arno and Das, Chittaranjan and Tallarida, Massimo and Schmeißer, Dieter and Strasser, Peter and Driess, Matthias}, title = {Unification of Catalytic Water Oxidation and Oxygen Reduction Reactions: Amorphous Beat Crystalline Cobalt Iron Oxides}, series = {Journal of the American Chemical Society}, volume = {2014}, journal = {Journal of the American Chemical Society}, number = {136}, issn = {1520-5126}, doi = {10.1021/ja509348t}, pages = {17530 -- 17536}, abstract = {Catalytic water splitting to hydrogen and oxygen is considered as one of the convenient routes for the sustainable energy conversion. Bifunctional catalysts for the electrocatalytic oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are pivotal for the energy conversion and storage, and alternatively, the photochemical water oxidation in biomimetic fashion is also considered as the most useful way to convert solar energy into chemical energy. Here we present a facile solvothermal route to control the synthesis of amorphous and crystalline cobalt iron oxides by controlling the crystallinity of the materials with changing solvent and reaction time and further utilize these materials as multifunctional catalysts for the unification of photochemical and electrochemical water oxidation as well as for the oxygen reduction reaction. Notably, the amorphous cobalt iron oxide produces superior catalytic activity over the crystalline one under photochemical and electrochemical water oxidation and oxygen reduction conditions.}, language = {en} } @incollection{NarraLogschGlaseretal., author = {Narra, Satyanarayana and Logsch, Florian and Glaser, Claudia and Ay, Peter and D{\"o}hling, Frank and Leistner, Diana and Strube, Dieter}, title = {LignoBioFuel : Entwicklung eines Verfahrens zur Herstellung von stofflich und energetisch nutzbaren Bioagglomeraten auf der Basis von Lignin}, series = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, booktitle = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, editor = {Thr{\"a}n, Daniela and Pfeiffer, Diana}, publisher = {DBFZ, Dt. Biomasseforschungszentrum}, address = {Leipzig}, pages = {85 -- 99}, language = {de} } @inproceedings{SeifarthWalczykLupinaetal., author = {Seifarth, Olaf and Walczyk, Christian and Lupina, Grzegorz and Zaumseil, Peter and Schmeißer, Dieter and M{\"u}ssig, Hans-Joachim and Schroeder, Thomas}, title = {The electronic band diagram of thin PrO2(111) / Pr-silicate buffers on Si(111) and its relevance to dielectric properties}, series = {Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 44}, booktitle = {Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 44}, publisher = {Deutsche Physikalische Gesellschaft}, address = {Bad Honnef}, issn = {0420-0195}, pages = {S. 136}, abstract = {Thin dielectric buffers of cubic PrO2(111) on Si(111) are ideally suited to integrate Ge onto Si by moderating the lattice mismatch between the materials. The leakage current across this dielectric buffer is strongly influenced by the electronic band diagram and defects inside the band gap. Therefore, we measured the band offsets, band gaps and defect positions by means of synchrotron radiation based photoemission spectroscopy techniques (XPS and XAS) with special emphasis on the Pr-silicate interface. In a next step we compare the spectroscopic data with information from dielectric studies, based on temperature dependent leakage current studies. We observe a close relation between dielectric properties and the electronic structure.}, language = {en} }