TY - GEN A1 - Klyszcz, Andreas A1 - Hübert, Thomas A1 - Sperling, R. A1 - Mathis, W. T1 - Patterned Sol-Gel-Derived Multifunctional Passivation Coatings T2 - Materials Week 2002 ; European Congress on Advanced Materials, their Processes and Applications ; 6th International Conference on Joining Ceramics, Glass and Metal CY - Munich, Germany DA - 2002-09-30 PY - 2002 SN - 3-88355-314-X PB - Werkstoff-Informationsges. AN - OPUS4-1614 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lüdicke, M. G. A1 - Hildebrandt, Jana A1 - Schindler, C. A1 - Sperling, R. A. A1 - Maskos, M. T1 - Automated QuantumDots Purification via Solid Phase Extraction N2 - The separation of colloidal nanocrystals from their original synthesis medium is an essential process step towards their application, however, the costs on a preparative scale are still a constraint. A new combination of approaches for the purification of hydrophobic Quantum Dots is presented, resulting in an efficient scalable process in regard to time and solvent consumption, using common laboratory equipment and low-cost materials. The procedure is based on a combination of solvent-induced adhesion and solid phase extraction. The platform allows the transition from manual handling towards automation, yielding an overall purification performance similar to one conventional batch precipitation/centrifugation step, which was investigated by thermogravimetry and gas chromatography. The distinct miscibility gaps between surfactants used as nanoparticle capping agents, original and extraction medium are clarified by their phase diagrams, which confirmed the outcome of the flow chemistry process. Furthermore, the solubility behavior of the Quantum Dots is put into context with the Hansen solubility parameters framework to reasonably decide upon appropriate solvent types. KW - Quantum Dots KW - Purification PY - 2022 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-559590 DO - https://doi.org/10.3390/nano12121983 SN - 2079-4991 VL - 12 IS - 12 PB - MDPI CY - Basel AN - OPUS4-55959 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Janzen, R. A1 - Sperling, M. A1 - Buscher, W. A1 - Bösel, A. A1 - Ehlbeck, J. A1 - Lischka, Susanne A1 - Piechotta, Christian T1 - Spezies-Analyse von Quecksilber-, Zinn- und Bleiverbindungen - Neues GC-MIP-OES-System N2 - Quecksilber-, Blei- und Zinnverbindungen gehören aufgrund Ihrer Toxizität zu den bedrohlichsten Umweltkontaminationen. Dabei können besonders die organischen Verbindungen bereits in kleinsten Mengen überaus schwerwiegende Folgen für Lebewesen verursachen. Während die anorganischen (mineralischen) Verbindungen dieser Elemente auch durch natürliche Prozesse wie Erosion aus Gestein und durch Vulkanismus in die Umwelt eingetragen werden, entstehen die meisten Kontaminationen der Umwelt aufgrund ihres jahrzehntelangen weltweiten Einsatzes in verschiedenen Pestiziden, Antifouling Anstrichen, Treibstoffen und zahlreichen industriellen Großprozessen, sowie ihrer Emission bei der Verfeuerung fossiler Brennstoffe. KW - GC-PED KW - Methylquecksilber KW - MIP PY - 2011 SN - 0016-3538 VL - 1 SP - 22 EP - 27 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-23374 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -