@unpublished{SteglichRabusSadaetal.2021, author = {Steglich, Patrick and Rabus, Dominik G. and Sada, Cinzia and Paul, Martin and Weller, Michael G. and Mai, Christian and Mai, Andreas}, title = {Silicon Photonic Micro-Ring Resonators for Chemical and Biological Sensing: A Tutorial}, series = {TechRxiv}, journal = {TechRxiv}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-16840}, year = {2021}, abstract = {Silicon photonic micro-ring resonators (MRR) developed on the silicon-on-insulator (SOI) platform, owing to their high sensitivity and small footprint, show great potential for many chemical and biological sensing applications such as label-free detection in environmental monitoring, biomedical engineering, and food analysis. In this tutorial, we provide the theoretical background and give design guidelines for SOI-based MRR as well as examples of surface functionalization procedures for label-free detection of molecules. After introducing the advantages and perspectives of MRR, fundamentals of MRR are described in detail, followed by an introduction to the fabrication methods, which are based on a complementary metal-oxide semiconductor (CMOS) technology. Optimization of MRR for chemical and biological sensing is provided, with special emphasis on the optimization of waveguide geometry. At this point, the difference between chemical bulk sensing and label-free surface sensing is explained, and definitions like waveguide sensitivity, ring sensitivity, overall sensitivity as well as the limit of detection (LoD) of MRR are introduced. Further, we show and explain chemical bulk sensing of sodium chloride (NaCl) in water and provide a recipe for label-free surface sensing.}, language = {en} } @unpublished{GattoKubitzkySchrieveretal.2019, author = {Gatto, Emanuela and Kubitzky, Sascha and Schriever, Marc and Cesaroni, Simona and Mazzuca, Claudia and Marafon, Giulia and Venanzi, Mariano and De Zotti, Marta}, title = {Building Supramolecular DNA-Inspired Nanowires on Gold Surfaces: From 2D to 3D}, series = {Angewandte Chemie International Edition}, journal = {Angewandte Chemie International Edition}, publisher = {Wiley}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-16113}, year = {2019}, abstract = {Three building blocks have been designed to chemically link to a gold surface and vertically self-assemble through thymine-adenine hydrogen bonds. Starting from these building blocks, two different films were engineered on gold surface. Film 1 consists of adenine linked to lipoic acid (Lipo-A) to covalently bind to the gold surface, and ZnTPP linked to a thymine (T-ZnTPP). Film 2 has an additional noncovalently linked layer: a helical undecapeptide analogue of the trichogin GA IV peptide, in which four glycines were replaced by four lysines to favor a helical conformation and reduce flexibility and the two extremities were functionalized with thymine and adenine to enable Lipo-A and T-ZnTPP binding, respectively. These films were characterized by electrochemical and spectroscopic techniques, and were very stable over time and when in contact with solution. Under illumination, they could generate current with higher efficiency than similar previously described systems.}, language = {en} } @unpublished{Liebchen2021, author = {Liebchen, Christian}, title = {Maximizing Bidirectional Green Waves for Major Road Axes}, doi = {10.15771/2827}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-15449}, pages = {1 -- 20}, year = {2021}, abstract = {Both, from an environmental perspective and with respect to road traffic flow quality, planning so-called green waves along major road axes is a well-established target for traffic engineers. For one-way road axes (e.g. the Avenues in Manhattan), this is a trivial downstream task. For bidirectional arterials, the well-known necessary condition for establishing a green wave in both direction is that the driving times between two subsequent crossings must be an integer multiple of half of the cycle time of the signal programs at the nodes. In this paper, we propose an integer linear optimization model to establish fixed-time green waves in both directions that are as long and as wide as possible, even in the situation where the driving time condition is not fulfilled. In particular, we are considering an arterial along whose nodes separate left-turn signal groups are realized. In our computational results, we provide examples which illustrate that allowing for selecting among different strategies for the left-turn phases is beneficial. Moreover, we show that there is always a solution with green waves in both directions that are as long and as wide as possible, where absolute priority is put on just one direction. Only when considering prioritized parts of a green band (e.g. some first few seconds), then an ideal green wave into one direction can provide suboptimal quality compared to optimizing both directions together.}, language = {en} } @unpublished{Tolkiehn2020, author = {Tolkiehn, G{\"u}nter-Ulrich}, title = {Transfer zwischen Wissenschaft und Gesellschaft}, series = {DUZ Wissenschaft \& Management}, volume = {2020}, journal = {DUZ Wissenschaft \& Management}, number = {10}, issn = {2627-0994}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-13817}, pages = {42 -- 47}, year = {2020}, abstract = {Hauptaufgabe der staatlichen Hochschulen ist es, Wissen zu schaffen und nutzbringend in die Gesellschaft, insb. in Wirtschaft und Verwaltung zu transferieren. Dies geschieht traditionell durch Forschung und ihre Publikation sowie durch Lehre und den Ausstoß von Absolventen. In den letzten Jahren wird von der Politik zunehmend auch die sog. „Dritte Mission" (Kooperation, Technologietransfer etc.) von der Wissenschaft eingefordert. Alle drei Transferwege werden jedoch gleichzeitig auch von der Politik behindert. Der Artikel greift drei Beispiele hierf{\"u}r heraus: Die Unt{\"a}tigkeit gegen{\"u}ber dem Aufbau einer privatwirtschaftlichen Bezahlschranke f{\"u}r die {\"o}ffentliche Nutzung staatlich finanzierter digitaler Publikationen, die aktive F{\"o}rderung des Aufbaus einer Sprachbarriere zwischen Landessprache und Wissenschaftsbetrieb und das Vers{\"a}umnis, die freie online-Publikation aller Abschlussarbeiten zur Erlangung wissenschaftlicher Grade sicherzustellen}, language = {de} }