TY - CONF A1 - de Oliveira Guilherme Buzanich, Ana T1 - Hard X-ray spectroscopy and imaging at the BAMline and MySpot beamlines at BESSY II (Berlin, Germany) N2 - Overview of the X-ray based analytical methods conducted at the BAMline and µSpot Beamline for structure analysis. T2 - Pccr2 + AfLS conference CY - Accra, Ghana DA - 29.01.2019 KW - X-ray spectroscopy KW - Synchrotron KW - Beamline KW - Material characterization PY - 2019 AN - OPUS4-47319 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Emmerling, Franziska T1 - May the Force be with you - Mechanochemical syntheses studied in situ N2 - Mechanochemistry is a fast and efficient method applicable for the synthesis of new organic, metal-organic, and inorganic compounds. The direct monitoring of milling reactions is still challenging. The underlying reaction mechanisms remain often unclear. In the last years, have established a tandem in situ approach for investigating mechanochemical reactions using time-resolved in situ XRD coupled with Raman spectroscopy. Here, we present an in situ coupling of synchrotron XRD, Raman spectroscopy, and thermography allowing the observation of mechanochemical reactions in real time. Information on the crystalline, molecular, and temperature state of the materials during grinding could be collected. The chemical composition of the reaction mixture was found to be directly correlated with changes in the temperature profile of the reaction. Furthermore, the presented setup allows the detection of crystalline, amorphous, eutectic as well as liquid intermediates. The resulting deeper kinetic and thermodynamic understanding of milling processes is the key for future optimization of mechanochemical syntheses. T2 - Seminar Universität Montpellier CY - Montpellier, France DA - 24.01.2019 KW - Mechanochemistry KW - In situ PY - 2019 AN - OPUS4-47261 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Emmerling, Franziska T1 - New insights in mechanochemical processes using real-time in situ investigations N2 - Use of synchrotron radiation for special sample conditions. Recent work of the group at BESSY II. T2 - DESY Usermeeting Satelite Workshop CY - Hamburg, Germany DA - 22.01.2019 KW - XRD KW - In situ KW - Rietveld KW - Synchrotron PY - 2019 AN - OPUS4-47262 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Radnik, Jörg A1 - Müller, Anja T1 - Introduction to photoelectronspectroscopy N2 - A short introduction to XPS/ESCA with the focus on nanoparticles and the preparation of such particles for the measurements T2 - Meeting of ACE Nano CY - Berlin, Germany DA - 18.02.2019 KW - ESCA/XPS KW - Nanoparticles KW - Preparation PY - 2019 AN - OPUS4-47437 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen A1 - Lauer, F. A1 - Seifert, S. A1 - Diehn, S. A1 - Kneipp, Janina T1 - MALDI-TOF MS und MALDI-MSI zur Identifikation und Klassifizierung von Pollen N2 - Es werden die letzten Ergebnisse präsentiert, die es ermöglichen, einzelne Pollenkörner unterschiedlicher Arten in Mischungen mittels MALDI-TOF Massenspektrometrie bzw. MALDI-TOF Imaging zu messen und unter Zuhilfenahme multivariater Auswertemethoden zu klassifizieren. T2 - 24. Bruker MALDI Anwendertreffen CY - Leipzig, Germany DA - 18.02.2019 KW - MALDI-TOF Massenspektrometrie KW - Pollenkörner KW - Klassifizierung KW - MALDI Imaging KW - Multivariate Analyse PY - 2019 AN - OPUS4-47441 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kunz, Valentin T1 - Surface chemical transformations of nanoparticles N2 - Nanomaterials are a relatively new class of materials for which a regulatory framework still has to be established and regulators require comprehensive datasets of well characterized nanomaterials for the implementation. Especially information about the surface chemistry of nanoparticles is crucial, since it largely determines their biological and environmental fate. How the surface chemistry changes under relevant ageing conditions is of particular interest, because exposure will normally occur not to the pristine material but to a nanoform that underwent some kind of transformation. In this talk, first a short overview about the contributions of division 6.1 to multiple European-funded projects will be presented, in which surface analytical techniques are used to improve the physical-chemical characterization of nanomaterials. Secondly, a study investigating the surface-chemical transformations of a representative set of titanium dioxide nanoparticles is discussed in more detail. The ageing has partly been performed at the BAM division 7.5, and the surface chemistry was analyzed using time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). By analyzing the complex mass spectra with principal component analysis (PCA), it was possible to identify even subtle changes that occur upon ageing. T2 - Abteilungsseminar CY - BAM, Berlin, Germany DA - 25.2.2019 KW - Nanoparticles KW - Surface Chemistry KW - Ageing KW - Titanium Dioxide KW - ToF-SIMS PY - 2019 AN - OPUS4-47444 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kittner, Maria A1 - Eisentraut, Paul A1 - Dittmann, Daniel A1 - Ruhl, A.S. A1 - Eitzen, L. A1 - Jekel, M. A1 - Braun, Ulrike T1 - Thermoanalytical methods for the optimisation of microplastic analysis in freshwater sediment samples N2 - Results of various thermoanalytical techniques are presented for the analysis of microplastics in sediment samples. The homogeneity and the representativness of samples war controlled, as well as steps of separation and microplastic detection by these techniques. T2 - MICRO CY - Lanzarote, Spain DA - 19.11.2018 KW - Water KW - Microplastics KW - Sampling KW - Sampling techniques PY - 2018 AN - OPUS4-47322 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kjaervik, Marit T1 - Quantitative biocide profile measurements by calibrated XPS N2 - This presentation provides an update on recent results from quantitative XPS-measurements of real and artificial biofilms. NAP-XPS, lab-based XPS and synchrotron-based XPS was used to obtain a vertical concentration profile of iodine in agarose-films with information depth ranging from 1 to 18 nm. T2 - Project meeting MetVBadBugs CY - Turin, Italy DA - 05.02.2019 KW - Biofilms KW - NAP-XPS KW - XPS KW - Iodine KW - Agarose PY - 2019 AN - OPUS4-47332 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duwe, M. A1 - Fischer, Daniel A1 - Quast, J.-H. A1 - Schneider, S. A1 - Beck, Uwe T1 - Curved-surface metrology by imaging Mueller-matrix ellipsometry N2 - Outline - maging ellipsometry: oncept and setup - Basic theory: ellipsometry on tilted/curved surfaces - Geometric considerations - Tilt-induced cross-polarization - Application: coating analysis on microlensarray - Mueller-Matrix Imaging - Conversion to Delta-Psi Image - Layer-thickness of ITO coating T2 - 8th International conference on spectroscopic CY - Barcelona, Spain DA - 26.05.2019 KW - Spectroscopic Imaging KW - Mueller-Matrix Ellipsometry KW - Curved surfaces PY - 2019 AN - OPUS4-48366 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ghasem Zadeh Khorasani, Media A1 - Elert, Anna Maria A1 - Hodoroaba, Vasile-Dan A1 - Agudo Jácome, Leonardo A1 - Altmann, Korinna A1 - Silbernagl, Dorothee A1 - Sturm, Heinz T1 - Short- and long-range mechanical and chemical interphases caused by interaction of Boehmite (γ-AlOOH) with anhydride-cured epoxy resins N2 - Understanding the interaction between boehmite and epoxy and the formation of their interphases with different mechanical and chemical structures is crucial to predict and optimize the properties of epoxy-boehmite nanocomposites. Probing the interfacial properties with atomic force microscopy (AFM)-based methods, especially particle-matrix long-range interactions, is challenging. This is due to size limitations of various analytical methods in resolving nanoparticles and their interphases, the overlap of interphases, and the effect of buried particles that prevent the accurate interphase property measurement. Here, we develop a layered model system in which the epoxy is cured in contact with a thin layer of hydrothermally synthesized boehmite. Different microscopy methods are employed to evaluate the interfacial properties. With intermodulation atomic force microscopy (ImAFM) and amplitude dependence force spectroscopy (ADFS), which contain information about stiffness, electrostatic, and van der Waals forces, a soft interphase was detected between the epoxy and boehmite. Surface potential maps obtained by scanning Kelvin probe microscopy (SKPM) revealed another interphase about one order of magnitude larger than the mechanical interphase. The AFM-infrared spectroscopy (AFM-IR) technique reveals that the soft interphase consists of unreacted curing agent. The long-range electrical interphase is attributed to the chemical alteration of the bulk epoxy and the formation of new absorption bands. KW - Nanocomposites KW - Interphase KW - Intermodulation AFM KW - Electron microscopy KW - Infrared nano AFM PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-483672 UR - https://www.mdpi.com/2079-4991/9/6/853/htm DO - https://doi.org/10.3390/nano9060853 SN - 2079-4991 VL - 9 IS - 6 SP - 853, 1 EP - 20 PB - MDPI AN - OPUS4-48367 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -