@inproceedings{MillauerJacobsHeinetal.2022, author = {Millauer, Jan and Jacobs, Hannes and Hein, J{\"o}rg-Helge and Brendler, Alina and Minieri, Marilena and Foitzik, Andreas}, title = {Validation of an Innovative Passive Collector for Pollutant Analysis in Groundwater}, series = {Open Conference Proceedings}, volume = {2}, booktitle = {Open Conference Proceedings}, publisher = {TIB Open Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-17660}, pages = {205 -- 207}, year = {2022}, abstract = {A passive pipe sampler device for contaminant analysis in groundwater was developed which create a permanent sampling flow from groundwater and in addition to temperature, conductivity and pressure, now also has room for specific sorbents. The large surface of the adsorber offers more binding surface for the analyte and the constant movement of the sorbent with fresh groundwater also provides homogeneous binding. The spectroscopic analyses at the monitoring site of the pipe passive sampler for groundwater monitoring points enables a measurement-based validation of the sorbent circulation as an alternative to a visual assessment. The optimum pump speed for the sorbens Lewatit® M500 and SR7 was evaluated. The 42mm slim measuring device allows the use in DN50 monitoring well and thus allows the setup of a closer measuring network.}, language = {en} } @article{SchattschneiderPiontekJacobsetal.2024, author = {Schattschneider, Christoph and Piontek, Sina and Jacobs, Hannes and B{\"o}hme, Andrea and Sirena, Concetta and Foitzik, Andreas}, title = {Proof of Principle of Wastewater Treatment using Plasma Discharge to Reduce the Amount of Methylparaben}, series = {Athens Journal of Sciences}, volume = {11}, journal = {Athens Journal of Sciences}, number = {1}, publisher = {Athens Institute for Education and Research}, issn = {2241-8466}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18649}, pages = {29 -- 38}, year = {2024}, abstract = {Synthetic substances like many pharmaceuticals, preservatives or other chemical compounds are actually very difficult to handle in sewage treatment. These compounds are very stable in aqueous solution and their degradation reactions are insufficient. Therefore, to eliminate these substances from wastewater additional afford is necessary. Extreme conditions like pH value, redox potential, chemical or physical energy need to be present. With our study we try to show that the use of plasma discharge could be a solution to this problem. Using the example of methylparaben, a preservative, we could show, that the physical energy of plasma discharge is able to initialize the degradation reaction in aqueous environment. The concentration was reduced by up to 70 percent in our setting depending on the treatment duration. Overall, the system showed potential to optimize wastewater treatment. Further examinations are necessary for example regarding undesirable by-products.}, language = {en} } @article{KagelJacobsBieretal.2019, author = {Kagel, Heike and Jacobs, Hannes and Bier, Frank Fabian and Gl{\"o}kler, J{\"o}rn and Frohme, Marcus}, title = {A Novel Microtiter Plate Format High Power Open Source LED Array}, series = {Photonics}, volume = {6}, journal = {Photonics}, number = {1}, issn = {2304-6732}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-11307}, year = {2019}, abstract = {Many photochemical or photobiological applications require the use of high power ultraviolet light sources, such as high-pressure mercury arc lamps. In addition, many photo-induced chemical, biochemical and biological applications require either a combinatorial setting or a parallel assay of multiple samples under the same environmental conditions to ensure reproducibility. To achieve this, alternative, controllable light sources, such as ultraviolet light emitting diodes (UV LEDs) with high power and spatial control are required. Preferably, LEDs are arranged in a suitable standardized 96-well microtiter plate format. We designed such an array and established the methods required for heat management and enabling stable, controllable illumination over time.}, language = {en} } @article{EngelsSchlegelJacobsetal.2021, author = {Engels, Andreas and Schlegel, Volker and Jacobs, Hannes and Großelindemann, Niklas and Morshed, Md. Niaz and Stenglein, Antonia Sigrid and Bonaiuto, Vincenzo and Foitzik, Andreas}, title = {3d Printer Heads for Extrusion of Biologicals Gels}, series = {Materials Science Forum}, volume = {1016}, journal = {Materials Science Forum}, publisher = {Trans Tech Publications}, issn = {0255-5476}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18773}, pages = {435 -- 439}, year = {2021}, abstract = {Processing biological materials with 3-dimensional (3D) printers has attracted increasing interest in several research areas. At the same time, off-the-shelf solutions are increasingly available in a wider variety to meet the current market demand. However, most of the available bioprinters are closed source, thus, modifications are quite challenging or require an avoidable consultation process with the manufacturer. Furthermore, the entry prices for basic machines amount to several thousands of euros. Whereas, high-end 3D bio printers with a vast array of features are available for several hundred thousand euros. Due to the immense potential of this tool in the field of biotechnology it is important to extend the availability of this technology for research purposes in terms of adaptability and price. This ongoing work focuses on open-source 3D printer heads with the ability to extrude biological materials. The print heads include several techniques to process low as well as high viscose biomaterials such as agar and gelatin. Additionally, obstacles such as continuous substrate tempering or integration into existing 3D printers are addressed. The work presented is open source and thus freely adaptable to any user's specific needs. Our goal is to process a diverse range of biomaterials with different print techniques.}, language = {en} } @inproceedings{FriedoHauschultzDoehleretal.2026, author = {Friedo, Maria Helene and Hauschultz, Mike Thomas and D{\"o}hler, Torsten and Erhardt, Tom and Jacobs, Hannes and Richetta, Maria and B{\"o}hme, Andrea and Krenz-Baath, Ren{\´e}}, title = {Development of Intelligent Process Automation Strategies to Enhance Selective Laser Melting Performance and Resource Efficiency}, series = {Tagungsband AALE 2026: Mechatronische Systeme f{\"u}r die Automatisierung: Fortschritt durch Pr{\"a}zision und Qualit{\"a}t}, booktitle = {Tagungsband AALE 2026: Mechatronische Systeme f{\"u}r die Automatisierung: Fortschritt durch Pr{\"a}zision und Qualit{\"a}t}, publisher = {Hochschule f{\"u}r Technik, Wirtschaft und Kultur Leipzig}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21430}, pages = {299 -- 307}, year = {2026}, abstract = {The research project FASER advances additive manufacturing processes for metallic materials, focusing on Selective Laser Melting (SLM). FASER stands for "Fehlerfreies Additives Fertigen durch adaptive Sensorik zur Optimierung der Energie- und Ressourceneffizienz". Conducted at the Technical University of Applied Sciences Wildau, it implements a comprehensive zero-defect strategy using market-standard equipment like the One Click Metal MPrint+ SLM machine and MPure powder removal station. These systems are enhanced with adaptive multi-sensor technology and intelligent process control to boost quality, cut energy use, and minimize material waste. Central to FASER is flexible camera-based multi-sensor integration, combining optical, thermographic, and spectroscopic methods for real-time monitoring in harsh SLM environments.}, language = {en} } @inproceedings{HeinrichStollfussJacobsetal.2023, author = {Heinrich, Moritz and Stollfuss, Carsten and Jacobs, Hannes and Di Vona, Maria Luisa and Pizzoferrato, Roberto and Foitzik, Andreas}, title = {A conductivity-based, batch-optimized system for analyzing the total of carbon parameter in water}, series = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, editor = {Stolzenburg, Frieder and Reinboth, Christian and Lohr, Thomas and Vogel, Kathleen}, publisher = {Hochschule Harz}, address = {Wernigerode}, issn = {2627-5708}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18598}, pages = {15 -- 20}, year = {2023}, abstract = {In cooperation with the company Purification Membranes Analytics GmbH (PMA), a prototype has been developed that analyzes the total organic carbon (TOC) content of water samples based on a complex conductivity measurement. In the process, a batchoptimized system was developed that delivers qualitative results even in highly polluted waters. This method requires small sample volumes and was assembled using an ultrapure water system, a sample mixing system, various electronic control units and a miniTOC system that uses a UV light source to decompose organic carbons and outputs differential values using two conductivity sensors. During the project, a fully automated prototype was developed and is ready for use. In the future, this method could support common methods and lead to more accurate statements on water quality in a cost-effective manner.}, language = {en} } @inproceedings{HeinrichJacobsDiVonaetal.2022, author = {Heinrich, Moritz and Jacobs, Hannes and Di Vona, Maria Luisa and Pizzoferrato, Roberto and Foitzik, Andreas}, title = {A Test System for Safely Measurements of Cancer-Inducing UV-C Diodes Produced in a Simple and Cost-Effective Way by Rapid Prototyping}, series = {Open Conference Proceedings}, volume = {2}, booktitle = {Open Conference Proceedings}, publisher = {TIB Open Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-17682}, pages = {197 -- 199}, year = {2022}, abstract = {New technologies leading to better and more efficient light emitting diodes. The emitted radiation reaches higher energy levels and lower wavelengths especially in the UV-C spectrum. UV-C light has a cancer inducing effect on human cells. Therefore it is necessary to work in a safe way with those devices. This work is focused on an open-source solution for rapid 3D printing of an safe UV-C radiation measuring device. Especially for research groups or universities which can not afford big safety labs. After modeling and printing the prototype, a series of tests has shown the functionality of that UV-C Diode test system. By using black printing filaments and infill rates over 50 \%, the transmission of light could be prevented and the system worked well.}, language = {en} } @inproceedings{HauschultzFriedoJacobsetal.2022, author = {Hauschultz, Mike Thomas and Friedo, Maria Helene and Jacobs, Hannes and Lafta, Mohammad and Engels, Andreas and Foitzik, Andreas}, title = {Low-cost Pipettierroboter auf Basis einer Portalfr{\"a}se}, series = {Open Conference Proceedings}, volume = {2}, booktitle = {Open Conference Proceedings}, publisher = {TIB Open Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-17649}, pages = {187 -- 191}, year = {2022}, abstract = {Zur Herstellung von langfristig stabilen Metall-Kautschuk-Verbunden sind chemische Haftvermittler notwendig. Nach Auftrag dieser wird Kautschuk mittels Gummispritzgießen auf die metallischen Grundk{\"o}rper aufgebracht. In Klein- und Kleinstserien kann der Haftvermittler in pr{\"a}zisen Volumina h{\"a}ndisch mit Hilfe eines Fluid-Dispensers aufgetragen werden. Allerdings verhindert dies eine Homogenit{\"a}t und Gleichheit der Schichtdicke, wodurch die Zuverl{\"a}ssigkeit und St{\"a}rke der Haftung variieren k{\"o}nnen. Als technische L{\"o}sung wurde ein Pipettierroboter avisiert. Mit Hilfe mehrerer mechanischer und elektrischer Adaptionen - so auch einer neuen Steuerungstechnik - wurden verschiedene Fluid-Dispenser auf 3-Achs-Portalfr{\"a}sen integriert. Somit konnte die volle Funktionsf{\"a}higkeit erreicht werden.}, language = {de} } @inproceedings{FriedoHauschultzJacobsetal.2022, author = {Friedo, Maria Helene and Hauschultz, Mike Thomas and Jacobs, Hannes and Lafta, Mohammad and Engels, Andreas and Foitzik, Andreas}, title = {Steuerungstechnik f{\"u}r das Auftragen von fluiden Haftvermittlern}, series = {Open Conference Proceedings}, volume = {2}, booktitle = {Open Conference Proceedings}, publisher = {TIB Open Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-17670}, pages = {217 -- 219}, year = {2022}, abstract = {The goal of this project was to enable an automated solution for the application of bonding agents to metallic bodies in the nanoliter range. For the automated application of adhesion promoters, a new control unit based on a mainboard for controlling 3D printers was used, with Marlin serving as the firmware. Adaptations were necessary in the area of motor currents, speeds, acceleration, sensitivity, print bed size and selection of mainboard and display. For the traverse paths, G-code was generated using a program in Python. For homogeneous and uniform wetting, the individual objects to be wetted are approached and the pipetting process is controlled. It was possible to establish the complete functionality.}, language = {de} } @article{EngelsSpeckSchlegeletal.2026, author = {Engels, Andreas and Speck, Sandy and Schlegel, Volker and Jacobs, Hannes and Krenz-Baath, Ren{\´e} and B{\"o}hme, Andrea}, title = {Substrate Tubing Heater Suitable for Large Volume 3D Printing with Extrusion of Thermo-Reversible Hydrogels}, series = {Key Engineering Materials}, volume = {1038}, journal = {Key Engineering Materials}, publisher = {Trans Tech Publications}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21092}, pages = {25 -- 30}, year = {2026}, abstract = {The advancement of 3-dimensional printing technology over the past ten years has raised interest in and accessibility to these devices. Due to its consistent growth and demand, 3D printing is becoming a consumer-friendly, reasonably priced craft. Due to technological advancements, it is becoming increasingly integrated into broader fields of science and research, as well as the manufacturing sector. The need for customized solutions is constantly growing across several industries. The 3D extrusion of hydrogels is advancing in the field of biomaterials with a broad spectrum of biomedical applications. Hydrogel extrusion prints heads often use stepper motors or pneumatic pressure systems to push the substrate onto a surface. These techniques are well-suited for materials with high viscosity. While these systems are usually bound to the syringe volume, a refillable reservoir enables them to print above the syringe's limitations. We developed a low-cost standalone heating system for flexible tubes to control the temperature, hence avoiding jellification and clogging of the tubing system leading to the nozzle of the print head. The system connects to an in-house made peristaltic pump, which forces the e.g. gelatin through the nozzle with low pulsation, enabling us to extrude multiple layers of precise tempered gelatin. The heating system is based on easily available materials and electronic components and does not require expensive tools.}, language = {en} }