@article{SzaboSteffensLenzetal., author = {Szab{\´o}, Peter and Steffens, Oliver and Lenz, Michael and Farkas, G{\´a}bor}, title = {Transient junction-to-case thermal resistance measurement methodology of high accuracy and high repeatability}, series = {IEEE Transactions on Components and Packaging Technologies}, volume = {28}, journal = {IEEE Transactions on Components and Packaging Technologies}, number = {4}, issn = {1521-3331}, doi = {10.1109/TCAPT.2005.859768}, pages = {630 -- 636}, abstract = {High-power packages show a characteristic three-dimensional heat flow resulting in large lateral changes in chip and case surface temperature. This paper proposes an unambiguous definition for the R/sub thJC/ junction-to-case thermal resistance as a key parameter of such packages based on a transient measurement technique ensuring high repeatability even at very low R/sub th/ values. The technique is illustrated on thermal transient measurements of high-power MOSFET devices. It is also presented how the same measurement results can be used for die attach quality analysis. Finally, a comparative method is shown for measuring the differences of R/sub th/ values among samples with many times higher resolution compared with a direct R/sub thJC/ measurement.}, language = {en} } @article{MayrockMikhailovSteffensetal., author = {Mayrock, Oliver and Mikhailov, Sergej A. and Steffens, Oliver and R{\"o}ssler, Ulrich}, title = {Observability of the acoustic plasma mode in double-layered quantum dots}, series = {Physica E: Low-dimensional Systems and Nanostructures}, volume = {1}, journal = {Physica E: Low-dimensional Systems and Nanostructures}, number = {1-4}, doi = {10.1016/S1386-9477(97)00048-9}, pages = {232 -- 234}, abstract = {Double-layered quantum dots represent a novel realization of a multi-component plasma system. By modelling the system and applying classical concepts we investigate the oscillator strength of the acoustic plasma mode and its dependence on the system parameters. In view of recent experimental results, we discuss the observability of this collective excitation.}, language = {en} } @misc{KoehlerOstermeierSchaubaecheretal., author = {K{\"o}hler, Ann-Kathrin and Ostermeier, Nadine and Schaub{\"a}cher, Ursula and Wolf, Lars}, title = {Einfluss der W{\"a}rmespeicherf{\"a}higkeit von Massivbauteilen auf den Heizw{\"a}rmebedarf und die Behaglichkeit eines Geb{\"a}udes}, address = {Regensburg}, subject = {W{\"a}rmespeicherung}, language = {de} } @techreport{SchaubeckSteffensRechenauer, author = {Schaubeck, Simon and Steffens, Oliver and Rechenauer, Christian}, title = {Integration eines kostenoptimierten, wirtschaftlich rentablen Blockheizkraftwerks mit mittlerer thermischer Leistung in ein genossenschaftliches Wohnquartier}, language = {de} } @inproceedings{RechenauerNeuleitnerSteffens, author = {Rechenauer, Christian and Neuleitner, Nikolaus and Steffens, Oliver}, title = {Empirische Untersuchung und Optimierung der Performance eines Modellprojekts f{\"u}r ein Effizienzhaus Plus mit solarthermischem Energiekonzept}, series = {Fachforum Effizienzhaus Plus, 14.07.2015}, booktitle = {Fachforum Effizienzhaus Plus, 14.07.2015}, address = {Hamburg}, language = {de} } @book{Steffens, author = {Steffens, Oliver}, title = {Einfluss der Potentialmodulation auf Magnetotransport und Quantenchaos in lateralen Halbleiter-{\"U}bergittern}, publisher = {Tectum-Verl.}, address = {Marburg}, isbn = {978-3-89608-726-3}, pages = {113}, language = {de} } @techreport{Steffens, author = {Steffens, Oliver}, title = {Saisonale W{\"a}rmespeicherung von opaken Bauteilen im Massivbau}, language = {de} } @article{RaithSchmidlingWindisch, author = {Raith, Lea and Schmidling, Anja and Windisch, Bastian}, title = {Bauteiltemperierung}, address = {Regensburg}, language = {de} } @article{SteffensSuhrkeRotteretal., author = {Steffens, Oliver and Suhrke, Michael and Rotter, Peter and R{\"o}ssler, Ulrich}, title = {From Landau levels to universal fluctuations: Level statistics for lateral superlattices}, series = {Physical Review B}, volume = {55}, journal = {Physical Review B}, number = {7}, doi = {10.1103/PhysRevB.55.4486}, pages = {4486 -- 4493}, abstract = {We study the energy-level statistics for electrons in a lateral two-dimensional superlattice in dependence on the strength of the modulation potential at a given perpendicular magnetic field. The interminiband statistics at some selected point in the magnetic Brillouin zone shows a transition from degenerate Landau levels to universal spectral correlations while the corresponding classical dynamics displays a crossover from regular cyclotron orbits to chaotic motion. In terms of the nearest-neighbor spacing distribution, we observe the occurrence of level repulsion for all nonzero modulation amplitudes, which indicates a discontinuous transition to universal fluctuations for the smallest level spacings when the rotational invariance of the system is broken by a finite superlattice potential. In order to test the universality of the transition on larger scales, we propose a random matrix model with one transition parameter for comparison. Confirmed by two different types of potential shapes, we detect an explicit influence of the potential shape on the level spacing distributions, which hence cannot be described by the one-parameter model. Using the spectral rigidity, however, universal long-range fluctuations in the regime of negligible Landau-level mixing are found, in agreement with our random matrix model.}, language = {en} } @article{SteffensWensauerSuhrke, author = {Steffens, Oliver and Wensauer, Andreas and Suhrke, Michael}, title = {Collective excitations in quantum dots: Calculated Raman spectra}, series = {physica status solidi (b)}, volume = {215}, journal = {physica status solidi (b)}, publisher = {Wiley}, doi = {10.1002/(SICI)1521-3951(199909)215:1<365::AID-PSSB365>3.0.CO;2-C}, pages = {365 -- 371}, abstract = {Electronic Raman scattering provides information on excited states, whose collective character as being related to the charge or spin density can be distinguished by using different polarization configurations. We employ time-dependent spin-density functional theory to calculate Raman spectra for circular semiconductor quantum dots with up to 10 electrons for the polarized and depolarized configuration and in dependence on an external magnetic field and the momentum transfer. Our results demonstrate an increase of the collective (or many-particle) character of the excitations with increasing momentum transfer and a mixing of spin- and charge-density modes for excitations from ground states with finite spin density. These results have predictive character, because corresponding experiments on few-electron dots have not yet been performed.}, language = {en} } @article{SuhrkeSteffensRotteretal., author = {Suhrke, Michael and Steffens, Oliver and Rotter, Peter and R{\"o}ssler, Ulrich}, title = {Quantum chaos and magnetotransport in lateral superlattices: The transition from weak to strong modulation potential}, series = {Physica E: Low-dimensional Systems and Nanostructures}, volume = {1}, journal = {Physica E: Low-dimensional Systems and Nanostructures}, number = {1-4}, issn = {1386-9477}, doi = {10.1016/S1386-9477(97)00060-X}, pages = {281 -- 287}, abstract = {Magnetotransport in lateral superlattices covers a variety of apparently different physics dependent on the amplitude of the modulation potential relative to the Fermi energy ranging from the weakly modulated 2DEG to the antidot lattice. Here we investigate the transition between weak modulation and antidots within the quantum-mechanical theory by studying (i) the single-particle spectrum with respect to quantum signatures of classical chaos and (ii) the change of characteristic features in the magnetoresistance starting from the Kubo formula.}, language = {en} } @techreport{SteffensRoesslerSuhrke, author = {Steffens, Oliver and R{\"o}ssler, Ulrich and Suhrke, Michael}, title = {Comment on "Shell Filling and Spin Effects in a Few Electron Quantum Dot"}, series = {Physical Review Letters}, volume = {77}, journal = {Physical Review Letters}, pages = {3613}, abstract = {We briefly report on calculated addition spectra for electrons in a circular quantum dot with perpendicular magnetic field. We compare our current density functional theory calculations with recent experiments by Tarucha et al. [PRL 77, 3613 (1996)]. We find a very good qualitative agreement of the structures and find an additional effect caused by Hund's first rule in magnetic field, which gives rise to new substructures not discussed in the paper by Tarucha.}, language = {en} } @article{Steffens, author = {Steffens, Oliver}, title = {Energetische Modernisierung und Restaurierung historisch wertvoller Stadtquartiere. Regenerative Energieversorgung als Schwerpunkt einer nachhaltigen Modernisierung historisch wertvoller Stadtquartiere (RENARHIS)}, series = {Zukunft bauen. Forschungsinitiative Zukunft Bau 2016}, journal = {Zukunft bauen. Forschungsinitiative Zukunft Bau 2016}, number = {5}, publisher = {Bundesministerium f{\"u}r Umwelt, Naturschutz, Bau und Reaktorsicherheit (BMUB)}, pages = {62 -- 65}, language = {de} } @misc{SteffensSaller, author = {Steffens, Oliver and Saller, Tobias}, title = {Modernisierungskonzepte f{\"u}r das denkmalgesch{\"u}tzte Ensemble am Jahn-Stadion Regensburg Pr{\"u}feninger Straße 47-52}, language = {de} } @techreport{OPUS4-2062, title = {Energienutzungsplan f{\"u}r die Gemeinde Sinzing}, editor = {Neuleitner, Nikolaus and Steffens, Oliver}, organization = {Hochschule f{\"u}r ANgewandte Wissenschaften Regensburg}, language = {de} } @incollection{Gerhards, author = {Gerhards, Helene}, title = {Von Patient*innenzellen und Patient*innenzahlen}, series = {Intersektionalit{\"a}t und Postkolonialit{\"a}t ; kritische feministische Perspektiven auf Politik und Macht}, booktitle = {Intersektionalit{\"a}t und Postkolonialit{\"a}t ; kritische feministische Perspektiven auf Politik und Macht}, editor = {Mauer, Heike and Leinius, Johanna and Gerhards, Helene}, publisher = {Verlag Barbara Budrich}, address = {Opladen; Berlin}, isbn = {9783847424550}, doi = {10.3224/84742455}, pages = {181 -- 203}, language = {de} } @article{HartmannHecknerPlach, author = {Hartmann, Julia and Heckner, Markus and Plach, Ulrike}, title = {Future Skills bei Studierenden - Messung und Einflussfaktoren}, series = {Die Neue Hochschule}, journal = {Die Neue Hochschule}, number = {6}, pages = {24 -- 27}, abstract = {Eine sich stetig ver{\"a}ndernde Arbeitswelt erfordert neue Kompetenzen von unseren Studierenden. In der Lehre gilt es nicht nur, diese Zukunftskompetenzen (sog. Future Skills) zu f{\"o}rdern, sondern diese auch zu messem und sichtbar zu machen.}, language = {de} } @misc{HartmannHecknerPlach, author = {Hartmann, Julia and Heckner, Markus and Plach, Ulrike}, title = {Einfluss studierendenzentrierter Lehrelemente auf die Entwicklung von Zukunftskompetenzen bei Studierenden}, language = {de} } @misc{Hartmann, author = {Hartmann, Julia}, title = {Der Einfluss verschiedener Lehr-Lern-Formate auf das studentische Engagement und die Entwicklung von Future Skills bei Studierenden}, language = {de} } @article{KoenigGuertler, author = {Koenig, Eric and Guertler, Katherine}, title = {One Size Does Not Fit All: Individuality and Perceptions of Improvement and Satisfaction Among TE Students}, series = {English Teaching \& Learning}, volume = {45}, journal = {English Teaching \& Learning}, number = {3}, publisher = {Springer Nature}, doi = {10.1007/s42321-021-00076-4}, pages = {303 -- 324}, abstract = {Academic self-regulation is a key factor for motivation and learning achievement. Yet with the large range of individual factors, this is not a one-size-fits-all proposition. This study of L2 Technical English students at two German universities explored learners' expectations and motivations, in particular regarding self-regulation and self-efficacy via the individual's time investment in self-led study. In an initial survey, learners (N=1646) reported on their English skill levels and anticipated learning habits. Complementarily, the retrospective survey investigated learners' (N=796) actual behavior during the course, their perceptions of language skill improvement, and their satisfaction. The initial survey indicates a clear understanding that time investment in self-regulated study will lead to greater improvement, an outcome confirmed in the retrospective survey. Additionally, students who invested more time in their coursework were more satisfied with their achievement, although most learners acknowledge they should have studied more. The results verify that learners recognize the nexus between self-regulation and language skill improvement, yet university students are not satisfied with their capacity to self-regulate their language learning strategies. While differences in students' skill levels and academic self-efficacy result in divergent degrees of progress, students of all types report benefits to their language skills when motivated to self-regulated study.}, language = {en} } @article{YeapMeisterOhetal., author = {Yeap, Kim Ho and Meister, Tobias and Oh, Zi Xin and Nisar, Humaira}, title = {Circuit Modelling Methodology for Dual-band Planar Antennas}, series = {APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL}, volume = {36}, journal = {APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL}, number = {8}, publisher = {APPLIED COMPUTATIONAL ELECTROMAGNETICS SOC}, doi = {10.47037/2021.ACES.J.360822}, pages = {1112 -- 1115}, abstract = {This paper presents a simple and systematic approach to determine the equivalent frequency-independent circuit model for a dual-band planar antenna. The Foster Canonical network synthesis technique with two RLC tanks has been employed to generate the two resonant bands of the antenna. The transfer function model is subsequently refined using a data fitting algorithm (viz the Nelder-Mead simplex algorithm). Parametric adjustments are performed at the final stage in order to further improve the accuracy of the final parameters.}, language = {en} } @article{LiStockSchlamminger, author = {Li, Shisong and Stock, Michael and Schlamminger, Stephan}, title = {A new magnet design for future Kibble balances}, series = {Metrologia}, volume = {55}, journal = {Metrologia}, number = {3}, publisher = {IOP PUBLISHING}, doi = {10.1088/1681-7575/aab2ea}, pages = {319 -- 325}, abstract = {We propose a new permanent magnet system for Kibble balance experiments, which combines advantages of the magnet designs invented by the National Physical Laboratory (NPL) and by the Bureau International des Poids et Mesures (BIPM). The goal of the proposed magnet system is to minimize the coil-current effect and to optimize the shielding at the same time. In the proposed design, a permanent magnet system with two gaps, each housing a coil, is employed to minimize the coil current effect, by reducing the linear coil-current dependence reported for the single air gap design by at least one order of magnitude. Both air gaps of the magnet are completely surrounded by high-permeability material, and hence the coils are shielded from outside magnetic fields and no magnetic field leaks outside of the magnet system. An example of the new magnet system is given and the analysis shows that the magnetic field in the air gap can be optimized to meet the requirement to be used in Kibble balances.}, language = {en} } @article{SchreinerLangerPrommesbergeretal., author = {Schreiner, Rupert and Langer, Christoph and Prommesberger, Christian and Dams, Florian}, title = {Compact and Energy-Efficient Field Emission Cathodes for Sensor Applications}, series = {Advanced Materials Research}, volume = {1024}, journal = {Advanced Materials Research}, publisher = {Scientific.net}, doi = {10.4028/www.scientific.net/amr.1024.372}, pages = {372 -- 375}, abstract = {We report on miniaturized silicon field emitter arrays for the application in compact and energy-saving vacuum-microelectronic devices, e.g. sensors or x-ray tubes. Since standard silicon semiconductor technology has been used for the fabrication, they may be easily integrated with other silicon based circuits and devices on the same chip. The silicon tip geometry and the operating conditions were optimized in order to obtain highly uniform and stable electron field emission from large area cathode arrays. A series of uniform hexagonal tip arrays containing each 547 tips were fabricated and characterized. The electron emission properties of both individual tips as well as of complete emitter arrays were investigated. A saturation level in the voltage-current characteristics was found, which can be explained by the limitation of the supply of electrons due to the p-type silicon wafer material. When operating the arrays in the current saturation regime at an emission current of ~ 1 nA per tip, a highly stable and low noise emission can be observed.}, language = {en} } @article{CheeKammlerGrahametal., author = {Chee, See Wee and Kammler, Martin and Graham, Jeremy and Gignac, Lynne and Reuter, Mark C. and Hull, Robert and Ross, Frances M.}, title = {Directed Self-Assembly of Ge Quantum Dots Using Focused Si2+ Ion Beam Patterning}, series = {scientific reports}, volume = {8}, journal = {scientific reports}, publisher = {Nature}, doi = {10.1038/s41598-018-27512-z}, pages = {1 -- 10}, abstract = {We show that templating a Si surface with a focused beam of Si2+ or Si+ ions can create suitable nucleation sites for the subsequent growth of self-assembled Ge quantum dots by chemical vapor deposition. To determine the mechanism of patterning we use atomic force microscopy to show that, similar to Ga+ patterning, the formation of a surface pit is required to enable control over Ge quantum dot locations. We find that relatively high implantation doses are required to achieve patterning, and these doses lead to amorphization of the substrate. We assess the degree to which the substrate crystallinity can be recovered by subsequent processing. Using in situ transmission electron microscopy heating experiments we find that recrystallization is possible at the growth temperature of the Ge quantum dots, but defects remain that follow the pattern of the initial implantation. We discuss the formation mechanism of the defects and the benefits of using Si ions for patterning both defects and quantum dots on Si substrates.}, language = {en} } @article{SchnitzerRichterWalteretal., author = {Schnitzer, Susanne and Richter, Stefanie and Walter, Andreas and Balke, Klaus and Kuhlmey, Adelheid}, title = {Die Bewertung der ambulanten Gesundheitsversorgung aus Versichertensicht}, series = {Gesundheits- und Sozialpolitik}, volume = {62}, journal = {Gesundheits- und Sozialpolitik}, number = {5}, publisher = {Nomos}, pages = {11 -- 20}, abstract = {In den letzten Jahren haben verschiedene Institutionen bev{\"o}lkerungsrepr{\"a}sentative Befragungen zur Bewertung von Einzelaspekten der Gesundheitsversorgung durchgef{\"u}hrt (Bertelsmann Gesundheitsmonitor, Commonwealth Fund, Gesundheitssurvey des Robert Koch-Instituts, BKK-Befragung, WIdO-monitor). Hierzu z{\"a}hlt auch die Kassen{\"a}rztliche Bundesvereinigung (KBV), die im Jahr 2006 die Forschungsgruppe Wahlen Telefonfeld (FGW) in Mannheim beauftragte, repr{\"a}sentativ gesetzlich und privat Versicherte zur Zufriedenheit mit der ambulanten Versorgung sowie zum Bedarf an neuen Dienstleistungsangeboten zu befragen (KBV 2006; Rieser 2006). Eine zweite Versichertenbefragung der KBV erfolgte im Zeitraum Mai und Juni 2008, wiederum von der FGW durchgef{\"u}hrt. Die Ergebnisse dieser repr{\"a}sentativen Erhebung werden im Rahmen von zwei Artikeln in Gesundheits- und Sozialpolitik vorgestellt. Im Zentrum des hier vorliegenden ersten Beitrags stehen die Inanspruchnahme der ambulanten haus- und fach{\"a}rztlichen Versorgung, die Erfahrungen mit Terminvergabe und Wartezeiten sowie die Bewertungen der Versorgung durch die Versicherten. Dar{\"u}ber hinaus wird die Bedeutung von Individuellen Gesundheitsleistungen (IgeL) in der ambulanten Versorgung gesetzlich Versicherter diskutiert. Der zweite Artikel wird sich schwerpunktm{\"a}ßig mit den Qualit{\"a}tskriterien f{\"u}r die Wahl eines Arztes, mit den Erfahrungen von Ver{\"a}nderungen in der Medikamentenverordnung sowie mit der Akzeptanz neuer Versorgungsformen und Wahltarife befassen.}, language = {de} } @article{SchnitzerRichterWalteretal., author = {Schnitzer, Susanne and Richter, Stefanie and Walter, Andreas and Balke, Klaus and Kuhlmey, Adelheid}, title = {Die Bewertung der ambulanten Gesundheitsversorgung aus Versichertensicht}, series = {Gesundheits- und Sozialpolitik}, volume = {62}, journal = {Gesundheits- und Sozialpolitik}, number = {6}, publisher = {Nomos}, pages = {19 -- 27}, abstract = {In der Ausgabe 5/2008 von „Gesundheits- und Sozialpolitik" wurden erste Ergebnisse der zweiten Versichertenbefragung der Kassen{\"a}rztlichen Bundesvereinigung (KBV) vorgestellt. Der Fokus der Darstellung lag im ersten Teil auf dem Inanspruchnahmeverhalten und der Zufriedenheit der Versicherten mit der {\"a}rztlichen Versorgung, wobei der Aspekt der Wartezeiten auf einen Termin und in der Arztpraxis ausf{\"u}hrlich behandelt wurde. Insgesamt ist eine hohe Inanspruchnahme der haus- und fach{\"a}rztlichen ambulanten Versorgung zu konstatieren sowie eine {\"u}berwiegende Zufriedenheit mit der {\"a}rztlichen Betreuung. Die Ergebnisse zu den Wartezeiten auf einen Arzttermin spiegeln im Vergleich zu {\"o}ffentlich gef{\"u}hrten Debatten ein differenziertes Bild wider. Im zweiten Teil werden folgende Fragen vertiefend diskutiert: Welche Kriterien sind neben der fachlichen Kompetenz (f{\"u}r die Versicherten) f{\"u}r die Wahl der Arztpraxis relevant? Welche Bedeutung haben G{\"u}tesiegel als Qualit{\"a}tsmarker f{\"u}r die Versicherten? Welche Erfahrungen haben die Versicherten mit {\"A}nderungen in der Medikamentenverordnung gemacht? Nehmen die Versicherten an Hausarztmodellen teil und wie bewerten sie die Versorgungsqualit{\"a}t? Welche Akzeptanz haben unterschiedliche Wahltarife bei den gesetzlich Versicherten?}, language = {de} } @article{BalkeSchnitzerWalteretal., author = {Balke, Klaus and Schnitzer, Susanne and Walter, Andreas and Richter, Stefanie and Kuhlmey, Adelheid}, title = {Wartezeit ist ein wichtiges Kriterium bei der Wahl der Arztpraxis}, series = {Deutsches {\"A}rzteblatt}, volume = {105}, journal = {Deutsches {\"A}rzteblatt}, number = {34-35}, publisher = {Deutscher {\"A}rzteverlag}, pages = {A1766 -- A1768}, abstract = {{\"A}ltere Patienten und Frauen warten l{\"a}nger auf einen Arzttermin als junge Versicherte und M{\"a}nner, gesetzlich Versicherte l{\"a}nger als Privatpatienten. Die meisten Patienten sind aber keineswegs unzufrieden. 90 Prozent bekommen entweder am selben Tag einen Termin oder halten die Wartezeit f{\"u}r angemessen.}, language = {de} } @inproceedings{HausladenBomkeBuchneretal., author = {Hausladen, Matthias and Bomke, Vitali and Buchner, Philipp and Bachmann, Michael and Knapek, Alexandr and Schreiner, Rupert}, title = {Influence of Geometrical Arrangements of Si Tip Arrays Fabricated by Laser Micromachining on their Emission Behaviour}, series = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 7/5/2021 - 7/9/2021, Lyon, France}, booktitle = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 7/5/2021 - 7/9/2021, Lyon, France}, publisher = {IEEE}, address = {Piscataway, N.J.}, isbn = {978-1-6654-2589-6}, issn = {2380-6311}, doi = {10.1109/IVNC52431.2021.9600717}, abstract = {ensely packed emitters on a field emission array lead typically to mutual shielding. Taking biology as a role model for geometric arrangements could be a way to reduce this effect. For comparison, two electron sources, one with a spiral and a second with conventional rectangular (orthogonal) arranged emitters, were fabricated and investigated. Emission currents of 6 µA in the spiral ordered array and 120 µA in the rectangular array were reached with an extraction voltage of 400 V. From a mid-term measurement over 1 h a current stability of ±8.8 \% (spiral) respectively ±5.7 \% (rectangular) with a mean degradation of -3.0 µA/h (spiral) and -0.12 µA/h (rectangular) could be observed.}, language = {en} } @inproceedings{BuchnerBomkeHausladenetal., author = {Buchner, Philipp and Bomke, Vitali and Hausladen, Matthias and Edler, Simon and Bachmann, Michael and Schreiner, Rupert}, title = {Investigation on the Emission Behaviour of p-doped Silicon Field Emission Arrays with Individually Controllable Single Tips}, series = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 7/5/2021 - 7/9/2021, Lyon, France}, booktitle = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 7/5/2021 - 7/9/2021, Lyon, France}, publisher = {IEEE}, isbn = {978-1-6654-2589-6}, doi = {10.1109/IVNC52431.2021.9600756}, pages = {1 -- 2}, abstract = {Four individually controllable emission tips consisting of <111> p-Type silicon, were structured on a glass substrate by laser ablation. A matching extraction grid was manufactured in the same manner and aligned with the emitters. The resulting samples were characterized in ultra-high vacuum. As expected, the individual currents show a strong saturation and in the saturation region a considerably lower current fluctuation than n-type silicon due to charge carrier depletion. The individual tips behave completely independent behaviour from each other and the overall emission can be deduced from the sum of the currents through the individual tips.}, language = {en} } @inproceedings{HechtBauereiβSellmairetal., author = {Hecht, Fabian and Bauereiβ, Florian and Sellmair, Josef and Buchner, Philipp and Hausladen, Matthias and Schreiner, Rupert}, title = {Electron Beam Induced Growth of Carbon Nanotips on Tungsten and Silicon Fieldemitters}, series = {2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC), 10-13 July 2023, Cambridge, MA, USA}, booktitle = {2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC), 10-13 July 2023, Cambridge, MA, USA}, publisher = {IEEE}, isbn = {979-8-3503-0143-4}, doi = {10.1109/IVNC57695.2023.10188960}, pages = {160 -- 162}, abstract = {In our experiments we grew electron emitting carbon nanostructures on tungsten tips. Subsequently, we transferred the growth process to pre-structured phosphorus-doped n-type silicon and obtained emitting carbon nanostructures directly grown on silicon. After growth of the nanostructures, the silicon field emitters showed increased emission currents of 76 nA at 1.1 kV (compared to 6 nA under the same conditions before growth).}, language = {en} } @inproceedings{HoellerBloedt, author = {H{\"o}ller, Christoph and Bl{\"o}dt, Adrian}, title = {Messung und Bewertung von elastischen Bodenbel{\"a}gen auf tief abgestimmten schwimmenden Estrichen in Fitnessstudios}, series = {Tagungsband DAGA 2021: 47. Jahrestagung f{\"u}r Akustik, 15.-18. August 2021, Wien und Online}, booktitle = {Tagungsband DAGA 2021: 47. Jahrestagung f{\"u}r Akustik, 15.-18. August 2021, Wien und Online}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, address = {Berlin}, language = {de} } @inproceedings{AllahamBuchnerSchreineretal., author = {Allaham, Mohammad M. and Buchner, Philipp and Schreiner, Rupert and Kn{\´a}pek, Alexandr}, title = {Testing the performance of Murphy-Good plots when applied to current-voltage characteristics of Si field electron emission tips}, series = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 5-9 July 2021, Lyon, France}, booktitle = {2021 34th International Vacuum Nanoelectronics Conference (IVNC): 5-9 July 2021, Lyon, France}, publisher = {IEEE}, doi = {10.1109/IVNC52431.2021.9600690}, pages = {1 -- 2}, abstract = {Murphy-Good plots are the most recent type of the analysis methods in the field electron emission theory, this type of plots has several useful characteristics such as: having the very-nearly straight line to represent the current-voltage characteristics and the absence of the correction factors in the mathematical procedure of the analysis process. In this study, n-type <111> and <100> Si chips containing four individual emitters are used as base emitters and mounted in a diode configuration field emission setup where the experiments are operated in an ultra-high vacuum ( 10-7 Pa). Each chip has four individual controllable emitters with 5 µm distance between the Si tips and the same material grid. Laser micromachining and subsequent wet chemical etching technique is used to structure and polish the tips. Murphy-Good plots are used to study the behavior of the Si individual tips and compare the results with the array current by extracting the field emission characterization parameters of the emitters.}, language = {en} } @inproceedings{BlahnikovaMuellerWaasetal., author = {Blahn{\´i}kov{\´a}, Barbora and M{\"u}ller, D. and Waas, M. and Lechner, Alfred}, title = {Multilyzer - microfluidic online measuring system for the analysis of environmentally relevant substances}, series = {AMA Conferences 2017 : Proceedings : SENSOR 2017 / N{\"u}rnberg 2017-05-30 - 2017-06-01}, booktitle = {AMA Conferences 2017 : Proceedings : SENSOR 2017 / N{\"u}rnberg 2017-05-30 - 2017-06-01}, publisher = {AMA Service GmbH}, address = {Wunstorf}, isbn = {978-3-9816876-4-4}, doi = {10.5162/sensor2017/P5.2}, pages = {696 -- 699}, language = {en} } @incollection{Schliermann, author = {Schliermann, Rainer}, title = {Fußball}, series = {Leitfaden Physiotherapie in der Neurologie. Physiotherapie in der Neurologie}, booktitle = {Leitfaden Physiotherapie in der Neurologie. Physiotherapie in der Neurologie}, editor = {Hengelmolen-Greb, A. and J{\"o}bges, M.}, publisher = {Elsevier}, pages = {443 -- 444}, language = {de} } @inproceedings{HoellerZeitler, author = {H{\"o}ller, Christoph and Zeitler, Berndt}, title = {Playing ball with transients on the force plate and on the reception plate}, series = {Noise control for a better environment. PROCEEDINGS OF INTERNOISE 2019. The 48th International Congress and Exhibition on Noise Control Engineering, June 16-19, Madrid}, booktitle = {Noise control for a better environment. PROCEEDINGS OF INTERNOISE 2019. The 48th International Congress and Exhibition on Noise Control Engineering, June 16-19, Madrid}, publisher = {INTERNATIONAL INSTITUTE OF NOISE CONTROL ENGINEERING}, language = {en} } @inproceedings{HoellerSteffens, author = {H{\"o}ller, Christoph and Steffens, Oliver}, title = {Bauphysikalische Grundlagenausbildung an der OTH Regensburg w{\"a}hrend der COVID-19-Pandemie}, series = {Tagungsband DAGA 2021: 47. Jahrestagung f{\"u}r Akustik, 15.-18. August 2021, Wien und Online}, booktitle = {Tagungsband DAGA 2021: 47. Jahrestagung f{\"u}r Akustik, 15.-18. August 2021, Wien und Online}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, isbn = {978-3-939296-18-8}, language = {de} } @inproceedings{HoellerMahn, author = {H{\"o}ller, Christoph and Mahn, Jeffrey}, title = {The Measurement of the Total and Resonant Radiation Efficiencies for Lightweight Constructions}, series = {Taming Noise and Moving Quiet. 46rd International Congress on Noise Control Engineering (Internoise 2017), 27-30 August 2017, Hong Kong}, booktitle = {Taming Noise and Moving Quiet. 46rd International Congress on Noise Control Engineering (Internoise 2017), 27-30 August 2017, Hong Kong}, publisher = {International Institute of Noise Control Engineering (I-INCE)}, pages = {1931 -- 1937}, language = {en} } @inproceedings{HoellerZeitlerSchoenwald, author = {H{\"o}ller, Christoph and Zeitler, Berndt and Schoenwald, Stefan}, title = {Anwendung von Cremers parallelen Platten auf leichte Bauelemente}, series = {Fortschritte der Akustik - DAGA 2017 : 43. Deutsche Jahrestagung f{\"u}r Akustik, 6.-9. M{\"a}rz 2017 in Kiel}, booktitle = {Fortschritte der Akustik - DAGA 2017 : 43. Deutsche Jahrestagung f{\"u}r Akustik, 6.-9. M{\"a}rz 2017 in Kiel}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, pages = {521 -- 524}, language = {de} } @article{MelekhovPennWeidaueretal., author = {Melekhov, Evgeny and Penn, Tatjana and Weidauer, Tobias and Abb, Valerius and Kammler, Martin and Lechner, Alfred}, title = {Tunable nanopillar array on a quartz-fiber tip for surface enhanced Raman scattering (SERS) detection}, series = {tm - Technisches Messen}, volume = {89}, journal = {tm - Technisches Messen}, number = {1}, publisher = {de Gruyter}, doi = {10.1515/teme-2021-0093}, pages = {70 -- 81}, abstract = {In this work, a simple two-step method to create tunable self-assembled three-dimensional nanostructure array-like nanoantennas directly on the tip of an optical quartz glass fiber is described. The structures are prepared by using dry etching of the fiber tip. For the etching process, gold nanoparticles fabricated by thermal dewetting technique were used as template. The structures are applied as sensors for label-free analysis of organic substances in ppb range, such as drug residues in liquid solutions. The measurements are carried out by a portable Raman device with an exchangeable sensor head utilizing the SERS-effect. This method allows in situ applications. In order to characterize the SERS cells, para-thiocresol and diclofenac sodium are used as model substances. For optimization of the substrate performance, different thicknesses of the dewetting-layer (6, 9, 12 nm), different etching times for formation of the pillars (6, 8, 10 and 12 min), and different thicknesses of SERS-metallization (25, 50, 75 nm) of gold and silver are compared. In order to show the applicability of the structure on the tip of a fiber, measurements from the upper side and from the underside of the substrate on quartz plates are compared. Reproducible SERS enhancement factors up to 10 7 {10^{7}} were achieved.}, language = {en} } @article{KammlerChidambarraoSchwarzetal., author = {Kammler, Martin and Chidambarrao, D. and Schwarz, K. W. and Black, C. T. and Ross, Frances M.}, title = {Controlled nucleation of dislocations by a spatially localized stress field}, series = {Applied Physics Letters}, volume = {87}, journal = {Applied Physics Letters}, number = {13}, publisher = {AIP}, doi = {10.1063/1.2061862}, abstract = {We analyze the nucleation of dislocations in silicon at spatially localized stress fields generated by silicon nitride pads having a high intrinsic stress. The nucleation and final configuration of the dislocations were studied using hot-stage transmission electron microscopy and were compared with dislocation simulations based on calculations of the stress fields around the pads. We find that the simulated configurations match well with the experimental data, and we show that the dislocation configuration can be controlled by the pad size.}, language = {en} } @article{KammlerHornvonHoegen, author = {Kammler, Martin and Horn-von Hoegen, Michael}, title = {Transition in growth mode by competing strain relaxation mechanisms}, series = {Applied Physics Letters}, volume = {85}, journal = {Applied Physics Letters}, number = {15}, publisher = {American Institute of Physics}, doi = {10.1063/1.1803914}, pages = {3056 -- 3058}, abstract = {Surfactant mediated epitaxy of Si(1-x)Gex alloys on Si(111) can, besides technological importance, clarify the influence of the lattice mismatch during surfactant mediated heteroepitaxial growth. For low Ge concentration we find an immediate layer-by-layer growth, whereas at high Ge concentration a roughening transition followed by relaxation of the lattice mismatch in a periodic dislocation network is preferred. This behavior can be explained by comparing the dislocation nucleation rate on a smooth surface with the island nucleation rate on a pseudomorphic film.}, language = {en} } @inproceedings{HoellerBloedtSchneider, author = {H{\"o}ller, Christoph and Bl{\"o}dt, Adrian and Schneider, M.}, title = {Kenngr{\"o}ßen elastisch gebundener Sch{\"u}ttungen auf Decken in Holzbauweisen}, series = {Fortschritte der Akustik DAGA 2022: 48. Jahrestagung f{\"u}r Akustik, 21. - 24. M{\"a}rz 2022, Stuttgart und Online}, booktitle = {Fortschritte der Akustik DAGA 2022: 48. Jahrestagung f{\"u}r Akustik, 21. - 24. M{\"a}rz 2022, Stuttgart und Online}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V.}, address = {Berlin}, language = {de} } @article{CheeKammlerBalasubramanianetal., author = {Chee, See Wee and Kammler, Martin and Balasubramanian, Prabhu and Reuter, Mark C. and Hull, Robert and Ross, Frances M.}, title = {Microstructural changes in silicon induced by patterning with focused ion beams of Ga, Si and Au}, series = {Ultramicroscopy}, volume = {127}, journal = {Ultramicroscopy}, publisher = {Elsevier}, doi = {10.1016/j.ultramic.2012.07.004}, pages = {126 -- 131}, abstract = {We use focused beams of Ga(+), Au(+) and Si(++) ions to induce local microstructural changes in single crystal silicon. The ions were delivered as single spot pulses into thin Si membranes that could subsequently be imaged and annealed in situ in a transmission electron microscope. For each ion, the focused ion beam implantation created an array of amorphous regions in the crystalline membrane. Annealing causes solid phase epitaxial regrowth to take place, but we show that the resulting microstructure depends on the ion species. For Ga(+) and Au(+), precipitates remain after recrystallization, while for Si(++), dislocation loops form around the periphery of each implanted spot. We attribute these loops to defects formed during solid phase epitaxial regrowth, with controlled placement of the loops possible.}, language = {en} } @inproceedings{ZhengFuhrmannXuetal., author = {Zheng, Jihong and Fuhrmann, Thomas and Xu, Boqing and Schreiner, Rupert and Jia, Hongzhi and Zhang, Wei and Wang, Ning and Seebauer, Gudrun and Zhu, Jiyan}, title = {Curriculum design and German student exchange for Sino-German Bachelor program majored in optoelectronics engineering}, series = {14th Conference on Education and Training in Optics and Photonics (ETOP 2017), 29-31.05.2017, Hangzhou, China, 29-31.05.2017}, booktitle = {14th Conference on Education and Training in Optics and Photonics (ETOP 2017), 29-31.05.2017, Hangzhou, China, 29-31.05.2017}, publisher = {SPIE}, doi = {10.1117/12.2269574}, pages = {134}, abstract = {Different higher education backgrounds in China and Germany led to challenges in the curriculum design at the beginning of our cooperative bachelor program in Optoelectronics Engineering. We see challenges in different subject requirements from both sides and in the German language requirements for Chinese students. The curriculum was optimized according to the AS IIN criteria, which makes it acceptable and und erstandable by both countries. German students are integrated into the Chinese class and get the sa me lectures like their Chinese colleagues. Intercultural and curriculum challenges are successfully solved. The results are summarized to provide an example for other similar international programs.}, language = {en} } @misc{OPUS4-4225, title = {Theorie, Semantik und Organisation von Wissen}, editor = {Babik, Wieslaw and Ohly, Heinz Peter and Weber, Karsten}, publisher = {Ergon Verlag}, address = {W{\"u}rzburg}, isbn = {978-3-95650-239-2}, doi = {10.5771/9783956503269}, subject = {Informations- und Dokumentationswissenschaft}, language = {de} } @article{Guertler, author = {Guertler, Katherine}, title = {Mixed language learner levels in higher education as an adverse effect of post-secondary education de-tracking}, series = {Fremdsprachen und Hochschule : FuH}, volume = {92}, journal = {Fremdsprachen und Hochschule : FuH}, publisher = {Clearingstelle d. AKS}, address = {Bochum}, issn = {0178-0336}, pages = {19 -- 36}, abstract = {Die unterschiedlichen Bildungswege in der deutschen Sekundarstufe f{\"u}hren abh{\"a}ngig von der Schulform zu abweichenden Lernergebnissen der Englischkompetenzen. Doch in der Terti{\"a}rstufe werden die Bildungswege wieder zusammengef{\"u}hrt und die Absolvent(inn)en aller Schulformen befinden sich in einer gemeinsamen Lernumgebung. Die vorgestellte empirische Untersuchung von {\"u}ber 450 Studierenden an zwei bayerischen Fachhochschulen hinsichtlich des Bildungshintergrunds und der Sprachkompetenzen belegt, dass die Lernenden in den nunmehr gemeinsamen Englischkursen im Terti{\"a}rbereich {\"u}ber stark unterschiedliche Kompetenzniveaus verf{\"u}gen. Die Daten zeigen eine ausgepr{\"a}gte Kaskade im Kompetenzniveau basierend auf der fr{\"u}heren Sekundarschulform, wobei Studierende der vertieften allgemeinbildenden Schule (Gymnasium) ihre Qualifikationen h{\"o}her einsch{\"a}tzen als Studierende von berufsbildenden Sekundarschulen (FOS und BOS). Obwohl in allen bayerischen Sekundarschulformen mindestens das GER-Niveau B2 als Standard f{\"u}r Schulabg{\"a}nger festgelegt ist, geben in der Stichprobe von Studierenden an Fachhochschulen mehr als die H{\"a}lfte der Lernenden das Niveau B1 in mindestens einer der Fertigkeiten f{\"u}r Englisch an; und etwas mehr als 8\% der Studierenden berichten ihre Selbsteinsch{\"a}tzung in jeder Fertigkeit als Niveau B1 oder niedriger. Die Ergebnisse lassen erkennen, dass ein breites Spektrum an Kompetenzniveaus von B1 bis C1 an den Fachohochschulen h{\"a}ufig endemisch ist, und dass die derzeitige Praxis, Englischkurse im Terti{\"a}rbereich f{\"u}r die idealisierten B2-Lernenden zu gestalten, den Bed{\"u}rfnissen vieler Studierenden nicht ausreichend entgegenkommt.}, language = {en} } @book{JanssenDanzEichStapfetal., author = {Janssen, Johann and Danz, Simone and Eich-Stapf, Karin and Sass, Elke and Breutmann, Bern and Hopfenm{\"u}ller, Manfred and Schmid, Andreas and Wagner, Joachim}, title = {Qualit{\"a}tsmanagement f{\"u}r Hochschulen}, publisher = {Hanser}, address = {M{\"u}nchen}, doi = {10.3139/9783446443976.fm}, pages = {376}, abstract = {Seit in den neunziger Jahren in Deutschland begonnen wurde das Konzept des Neuen Steuerungsmodels ("New Public Management") einzuf{\"u}hren, werden Hochschulen st{\"a}rker als bisher an ihrer Leistungsf{\"a}higkeit gemessen. Um die {\"o}ffentlichen Verwaltungen zu modernisieren, werden hierbei Managementtechniken aus der privaten Wirtschaft zur strategischen Steuerung an Hochschulen und an anderen {\"o}ffentlichen Verwaltungen {\"u}bernommen. Die Hochschulen werden verst{\"a}rkt als Dienstleister wahrgenommen und st{\"a}rker an ihrem tats{\"a}chlichen Output gemessen. Parallel dazu hat der internationale Wettbewerb zwischen Hochschulen zugenommen. Beide Entwicklungen erfordern von den Hochschulen, effektive Managementstrukturen zu entwickeln, die ihre Qualit{\"a}t und Leistungsf{\"a}higkeit sichern und systematisch weiterentwickeln. Hierbei d{\"u}rfen aber die f{\"u}r den Erfolg der Hochschule essenziellen Faktoren wie Kreativit{\"a}t, Innovation und Diversit{\"a}t nicht eingeschr{\"a}nkt, sondern m{\"u}ssen vielmehr gest{\"a}rkt werden. Zudem weisen Hochschulen mit ihren demokratischen hochschulpolitischen Gremien sowie der grundgesetzlich garantierten Freiheit von Forschung und Lehre besondere Strukturen auf, die sich grunds{\"a}tzlich von denen privatwirtschaftlicher Unternehmen unterscheiden. Viele Aspekte klassischer Managementsysteme und die Prozesse zu deren Einf{\"u}hrung k{\"o}nnen also nicht eins zu eins auf Hochschulen {\"u}bertragen werden. In der DGQ-Arbeitsgruppe 360 "Einf{\"u}hrung von Qualit{\"a}tsmanagement an Hochschulen" haben Experten aus verschiedenen Hochschulen ihre Erfahrungen und ihr Wissen zusammengetragen, wie ein ganzheitliches Qualit{\"a}tsmanagementsystem den besonderen Zielsetzungen und Strukturen von Hochschulen gerecht werden kann. In diesem Praxisbuch zeigen die Autoren Schritt f{\"u}r Schritt, wie ein solches Qualit{\"a}tsmanagementsystem eingef{\"u}hrt und gestaltet werden kann und wie es die Qualit{\"a}t und Leistungsf{\"a}higkeit der Hochschule erh{\"o}hen kann. Dabei wird ein starker Fokus auf die Prozessorientierung und den Einsatz von Verbesserungszyklen gelegt. Die relevanten Standards und Normen werden beschrieben und die wichtigsten Begriffe gekl{\"a}rt. Besonders wertvoll sind aber sicher die vielen Beispiele aus {\"u}ber 20 Hochschulen und die Erl{\"a}uterungen zu typischen Stolpersteinen und wichtigen Erfolgsfaktoren - zum Beispiel die große Bedeutung von Kommunikation und Projektmanagement bei der Einf{\"u}hrung eines Qualit{\"a}tsmanagementsystems. Mit diesem Buch hat die Arbeitsgruppe eine Hilfestellung f{\"u}r Praktiker erarbeitet, die sich in Pr{\"a}sidien, Verwaltungsreferaten und den Fachbereichen der Hochschulen mit dem integrierten Management, der Evaluation von Forschung, Studium und Lehre oder der Qualit{\"a}tssicherung besch{\"a}ftigen. Zudem leistet sie einen wertvollen Beitrag, den Qualit{\"a}tsgedanken auf die spezielle Organisation Hochschule zu {\"u}bertragen.}, language = {de} } @incollection{BlahnikovaMuellerWaasetal., author = {Blahn{\´i}kov{\´a}, Barbora and M{\"u}ller, D. and Waas, M. and Lechner, Alfred}, title = {Multilyzer - Mikrofluidisches Echtzeitmesssystem f{\"u}r die Analyse umweltrelevanter Substanzen}, series = {7. MikroSystemTechnik Kongress "MEMS, Mikroelektronik, Systeme", 23.-25. Oktober 2017, M{\"u}nchen}, booktitle = {7. MikroSystemTechnik Kongress "MEMS, Mikroelektronik, Systeme", 23.-25. Oktober 2017, M{\"u}nchen}, publisher = {VDE-Verlag}, address = {M{\"u}nchen}, isbn = {978-3-8007-4491-6}, pages = {382 -- 385}, abstract = {Die {\"u}berm{\"a}ßige Verwendung von stickstoffbasierten D{\"u}ngemitteln in der Landwirtschaft stellt eine Gef{\"a}hrdung f{\"u}r die Umwelt und Lebewesen dar. So ist die Analyse von Boden- und Grundwasser zu einem wesentlichen Bestandteil der Nachhaltigkeit und der {\"o}kologischen Erhaltung geworden. Daf{\"u}r bietet der Multilyzer eine passende L{\"o}sung. Der Multilyzer ist ein mikrofluidisches Analysesystem zur Bestimmung niedrigster Konzentrationen von Nitrat, Nitrit und Ammonium, die alle wesentliche Bestandteile des Stickstoffkreislaufs sind. Welche bei {\"U}berm{\"a}ßiger Aufnahme im K{\"o}rper krebserregend wirken und den Sauerstofftransport im Blutkreislauf st{\"o}ren. Der Aufbau ist eine Kombination aus Absorptions- und Fluoreszenzspektroskopie. Der Betrieb mit einer 12 Volt Batterie erm{\"o}glicht die Verwendung des Multilyzer-Systems zur Online-Messung im Feld. Somit k{\"o}nnen sehr kurze Analysezeiten realisiert und der Einfluss von Umwandlungs- bzw. Abbauprozessen vermieden werden. Das gesamte Messsystem wird im Kompetenzzentrum Nanochem an der OTH Regensburg entwickelt, inklusive Fertigungstechnologien, Software- und Hardwaresteuerung.}, language = {de} } @inproceedings{BiekerRoustaieLangeretal., author = {Bieker, Johannes and Roustaie, Farough and Langer, Christoph and Schreiner, Rupert and Schlaak, Helmut F.}, title = {Innovatives Verfahren zur Herstellung und Integration metallischer Nanokonen f{\"u}r die Feldemission}, series = {MikroSystemTechnik Kongress 2017 : MEMS, Mikroelektronik, Systeme 23.-25. Oktober 2017 in M{\"u}nchen}, booktitle = {MikroSystemTechnik Kongress 2017 : MEMS, Mikroelektronik, Systeme 23.-25. Oktober 2017 in M{\"u}nchen}, number = {CD-ROM}, publisher = {VDE-Verlag}, address = {M{\"u}nchen}, isbn = {978-3-8007-4491-6}, pages = {797 -- 800}, abstract = {In den letzten Jahren wurde am Institut f{\"u}r Elektromechanische Konstruktionen die Fabrikation und Integration von metallischen Nanodr{\"a}hten und Nanokonen mittels Template-basierter Abscheidung erforscht. Diese Variante der in-situ Abscheidung von metallischen Nanostrukturen bietet eine Vielzahl von Anwendungsm{\"o}glichkeiten. Im Rahmen dieses Beitrags werden das Herstellungsverfahren zur Herstellung metallischer Nanokonen vorgestellt. Dies beinhaltet sowohl die Templatepr{\"a}paration mittels asymmetrischen {\"A}tzens als auch die anschließende Integration mittels galvanischer Abscheidung. Eine Anwendung der metallischen Nanokonen stellt die Verwendung als Feldemitter in der Vakuumelektronik dar. Es werden erste Messungen der Langzeitstabilit{\"a}t des Feldemissionsstromes der metallischen Konen pr{\"a}sentiert.}, language = {de} } @incollection{BetzLechner, author = {Betz, Michael A. and Lechner, Alfred}, title = {Sprayganik - Spraytool f{\"u}r organische Halbleiter}, series = {7. MikroSystemTechnik Kongress "MEMS, Mikroelektronik, Systeme", 23.-25. Oktober 2017, M{\"u}nchen}, booktitle = {7. MikroSystemTechnik Kongress "MEMS, Mikroelektronik, Systeme", 23.-25. Oktober 2017, M{\"u}nchen}, publisher = {VDE-Verlag}, address = {M{\"u}nchen}, isbn = {978-3-8007-4491-6}, pages = {747 -- 750}, abstract = {Spr{\"u}hbeschichtung stellt einen kosteng{\"u}nstigen und materialeffizienten aber komplexen Prozess dar. Um diese Vorteile f{\"u}r die Abscheidung teurer organischer Halbleiter zu nutzen, wurde ein Spr{\"u}hbeschichter entwickelt, der neueste Anforderungen an den Prozess erf{\"u}llt. Zudem konnten selbstansaugende Mikrospr{\"u}hd{\"u}sen mikrotechnologisch in Silizium realisiert werden, welche bereits eine bis zu vierfache Materialeffizienz im Vergleich zu herk{\"o}mmlichen airbrush-D{\"u}sen nachweisen konnten. Die neueste D{\"u}sengeneration zeigt nun eine weiter verbesserte Zerst{\"a}ubung, was bei gespr{\"u}hten OPDs zu einer reduzierten Dunkelstromdichte von 9,1×10-6 mA·cm-2 (-5 V) und erh{\"o}hten externen Quanteneffizienz von 78,5\% (530 nm, -5 V) f{\"u}hrt.}, language = {de} }