6 Materialchemie
Filtern
Erscheinungsjahr
- 2020 (73) (entfernen)
Dokumenttyp
- Vortrag (73)
Referierte Publikation
- nein (73)
Schlagworte
- Nanoparticles (9)
- BAMline (8)
- Small angle scattering (7)
- Synchrotron (7)
- Electron microscopy (5)
- Geant4 (5)
- Geant4-DNA (5)
- MCS (5)
- Particle size distribution (5)
- XRF (5)
- Machine learning (4)
- Monte-Carlo simulations (4)
- Nanomaterials (4)
- Particle scattering simulation (4)
- Topas (4)
- Particle scattering simulations (3)
- Scattering (3)
- Standardization (3)
- VAMAS (3)
- Adhesive strength (2)
- Analysis (2)
- BDS (2)
- Batteries (2)
- Correlative ex-situ ellipsometric analysis (2)
- Corrosion (2)
- Desintegracion radioactiva (2)
- Dosimetry (2)
- EC4SafeNano (2)
- Ellipsometric operando investigation (2)
- Gold (2)
- Hydrogen economy (2)
- Inter-laboratory comparison (2)
- Interfaces (2)
- Materialbearbeitung (2)
- Mesoporous iridium oxides films (2)
- Mikroplastik (2)
- Método de Montecarlo (2)
- Nanocomposites (2)
- Nanosafety (2)
- Oxygen evolution reaction (2)
- Radioactive decay (2)
- Radioactive nanoparticle (2)
- Rigid amorphous fraction (2)
- Risk assessment (2)
- Scientific rigor (2)
- Simulation (2)
- Simulations (2)
- Size (2)
- Software (2)
- TED-GC/MS (2)
- TMDSC (2)
- Traceability (2)
- Ultrakurze Laserimpulse (2)
- XANES (2)
- nanoparticula (2)
- AFM (1)
- Absorbed dose (1)
- Academic fraud (1)
- Academic metrics (1)
- Alkali-activated materials (1)
- Application (1)
- Archäometrie (1)
- Atomic Forc Microscopy (1)
- Bimodal (1)
- Biomaterials (1)
- Biomimetics (1)
- Bonding strength (1)
- C++ (1)
- CEN/TC 352 Nanotechnologies (1)
- Calcium sulfate (1)
- Case studies (1)
- Catalogue of Services (CoS) (1)
- Centrifugal Adhesion Testing (CAT) (1)
- Centrifugal adhesion testing (CAT) (1)
- Cmake (1)
- Coded Aperture (1)
- Composite strength (1)
- Compound strength (1)
- Copolymer (1)
- Correlative imaging (1)
- Cyclic (1)
- DNA (1)
- Data analysis (1)
- Data corrections (1)
- Data curation (1)
- Data manipulation (1)
- Data organization (1)
- Debian (1)
- Diffraction (1)
- Diffusion (1)
- Dosimetrie (1)
- EBSD (1)
- EDX (1)
- EMPIR (1)
- ESI-TOF MS (1)
- EU (1)
- Effective dose (1)
- Electrons (1)
- Elektronenmikroskopie (1)
- Energiedosis (1)
- Energy dose (1)
- Equivalent dose (1)
- European Centre (1)
- FIB (1)
- Failure pattern (1)
- Femtosecond laser ablation (1)
- Field of View (1)
- Functional materials (1)
- Geothermal (1)
- Geringe Partikelfrachten (1)
- Git (1)
- High Entropy Alloys (1)
- High-entropy alloy (1)
- High-entropy alloys (1)
- History (1)
- Homogeneous deposition (1)
- Hyperspectral data (1)
- ISO/TC 229 (1)
- Image manipulation (1)
- Imaging (1)
- Imaging XPS (1)
- Interlaboratory comparision (1)
- Introduction (1)
- Ionization (1)
- Iron oxide nanoparticles (1)
- Kleine Partikel (1)
- LC-MS (1)
- Laser ablation (1)
- Laser-induced periodic surface structures (LIPSS) (1)
- Laser-induced periodic surface structures, LIPSS (1)
- Linear (1)
- Linux (1)
- MALDI (1)
- MALDI-TOF MS (1)
- MOFs (1)
- Mass spectrometry (1)
- Medium Entropy Alloys (1)
- Metadata structuring (1)
- Metal (1)
- Methodology (1)
- Metrology (1)
- Microbeam analysis (1)
- Microplastic (1)
- Microplastic analysis (1)
- Microplastic mass contents (1)
- Microplastic particles (1)
- Microplastics (1)
- Microprinting (1)
- Microstructure (1)
- Mikroplastik-Massengehalte (1)
- Monte-Carlo simulation (1)
- Multivariate Datenanalyse (1)
- NIR (1)
- Nano (1)
- Nano-related data (1)
- Nano-risk assessment (1)
- Nanomaterial properties (1)
- Nanoparticle (1)
- Nanopartikel (1)
- Nanoplattform (1)
- Nanosafety services (1)
- Nanostructure (1)
- Natural language processing (1)
- Neural networks (1)
- Non-destructuve testing (1)
- Normung (1)
- Nucleation (1)
- Oberflächenanalytik (1)
- Oberflächenstrukturierung (1)
- Particle number concentration (1)
- Particle size (1)
- Polylactide (1)
- Polymer (1)
- Polymer membranen (1)
- Potentiodynamic Polarization (1)
- Preparation (1)
- Prüfgeschwindigkeiten (1)
- Pull-off test (1)
- Radiation (1)
- Reference Material (1)
- Reference data (1)
- Reference material (1)
- Reference materials (1)
- Referenzdaten (1)
- Referenzmaterial (1)
- Regulation (1)
- Reproducibility (1)
- Ringversuche (1)
- Röntgenstrahlung (1)
- SAXS (1)
- SAXS/WAXS (1)
- SEM (1)
- SOP (1)
- STEM-in-SEM (TSEM) (1)
- Saline brine (1)
- Sample peparation (1)
- Sample preparation (1)
- Saxs (1)
- Scanning Kelvin Probe Force Microscopy (1)
- Scanning kelvin probe force microscopy (1)
- Scientific misconduct (1)
- Semiconductor (1)
- Sewer structures (1)
- Shape (1)
- SiO2 (1)
- Single-source precursors (1)
- Small-angle scattering (1)
- Small-area XPS (1)
- Soil (1)
- Standardarbeitsanweisung (1)
- Standardisation (1)
- Standardisierung (1)
- Statistischen Untersuchung (1)
- Strahlenschutz (1)
- Stumpfklebungen (1)
- Sulfuric acid resistance (1)
- Surface functionalization (1)
- TXRF (1)
- Thermal desorption analysis (1)
- Tire wear (1)
- ToF-SIMS (1)
- Topas-nbio (1)
- VRF (1)
- Vergleichsuntersuchungen (1)
- WAXS (1)
- Wasserstoff (1)
- X-ray generation (1)
- X-ray imaging (1)
- X-ray instrumentation (1)
- X-ray photoelectron spectroscopy (1)
- X-ray scattering (1)
- X-ray spectroscopy (1)
- Xrays (1)
- Zentrifugentechnologie (1)
- nPSize (1)
Organisationseinheit der BAM
- 6 Materialchemie (73)
- 6.1 Oberflächen- und Dünnschichtanalyse (21)
- 6.3 Strukturanalytik (16)
- 6.6 Physik und chemische Analytik der Polymere (14)
- 6.5 Synthese und Streuverfahren nanostrukturierter Materialien (11)
- 6.2 Material- und Oberflächentechnologien (7)
- 6.7 Materialsynthese und Design (5)
- 1 Analytische Chemie; Referenzmaterialien (3)
- 7 Bauwerkssicherheit (3)
- 9 Komponentensicherheit (2)
Eingeladener Vortrag
- nein (73) (entfernen)
Data quality is a vast term, which comprises the completeness, relevance (adequacy), and reliability of data. So far, many attempts to assure data quality have been pursued, and evaluation criteria for data quality have been established. One relatively novel but already well-known aspect of data quality refers to the concept of data FAIRness, which states that data should be: findable, accessible, interoperable and re-usable. In order to find, use, and access data, a user has to be guided properly. Such guidelines already exist for regulators and the scientific community. However, a ‘simple’ non-academic user from general society is very unlikely to be able to access or understand such data. Our objective in the H2020 project NANORIGO is to help and guide all types of users (i.e., scientists, regulators, industry workers, citizens, etc.) to access and make use of high-quality data and information from available and suitable data repositories in order to increase the transparency of and trust in nanotechnology.
The dark side of science
(2020)
The Dark Side of Science
(2020)
The SPONGE
(2020)
In the face of rising energy demand and the impending climate change the development of a sustainable, fossil-free fuel and chemical production is of global importance. One possible goal is the development of electrochemical conversion processes using catalysts. Porous materials play an important role in such energy applications. The key to the development of improved catalysts is a better understanding of the relations between their performance, stability and physico-chemical properties. However, the complex morphology of such catalysts constitutes a challenge even for modern analytical techniques.
Spectroscopic ellipsometry (SE) is a versatile method for studying material properties by using appropriate models (e.g. film thickness, optical and electronic properties). The fact that the material properties cannot be taken directly from the measured spectra, the developed models have to be validated. In a first step, the model for the ellipsometric fit studies of a calcination series of mesoporous iridium oxide films (300 – 600 °C) was investigated and validated with respect to their material properties. Moreover, the electronic structures of the catalysts reveal a direct correlation with electrochemical activities. The development of an environmental cell offers the possibility of investigations under real conditions. This will allow changes in the optical and electronic properties during the electrocatalytic oxygen evolution reaction.
In the face of rising energy demand and the impending climate change the development of a sustainable, fossil-free fuel and chemical production is of global importance. One possible goal is the development of electrochemical conversion processes using catalysts. Porous materials play an important role in such energy applications. The key to the development of improved catalysts is a better understanding of the relations between their performance, stability and physico-chemical properties. However, the complex morphology of such catalysts constitutes a challenge even for modern analytical techniques. Spectroscopic ellipsometry (SE) is a versatile method for studying material properties by using appropriate models (e.g. film thickness, optical and electronic properties). The fact that the material properties cannot be taken directly from the measured spectra, the developed models have to be validated. In a first step, the model for the ellipsometric fit studies of a calcination series of mesoporous iridium oxide films (300 – 600 °C) was investigated and validated with respect to their material properties. Moreover, the electronic structures of the catalysts reveal a direct correlation with electrochemical activities. The development of an environmental cell offers the possibility of investigations under real conditions. This will allow changes in the optical and electronic properties during the electrocatalytic oxygen evolution reaction.
Trace elements are chemical elements whose concentration in a material is very low. The exact definition depends on the application and varies for example between 100 micrograms per gram in analytical chemistry and 1000 micrograms per gram in geology. The ability to detect trace elements fast and quantitatively is of great importance in many areas of science and technology. With its high brilliance and flexibility in the excitation conditions, synchrotron radiation is an ideal tool for detecting traces even in small sample quantities. In this contribution I will report about the use of X-ray fluorescence(XRF)for qualitative and quantitative element sensitiveanalysis. In addition to the fundamentals of XRF and its quantification methods, the advantages and problems of different geometries like e.g. microXRF, Total Reflection X-ray Fluorescence (TXRF)or Double Dispersive XRF (D²XRF) will be discussed. Practical examples from BAMline from the research fields of medicine, geology and archaeometry will complete the lecture.
Gold ist eines der sieben schon im Altertum bekannten Metalle und wurde wg. seines Glanzes und seiner Seltenheit von alters her als Tauschmittel und zur Herstellung von Schmuck benutzt. Außerdem ist es einfach bearbeitbar und weitestgehend gegen chemische Einflüsse resistent. Die Untersuchungen von Gold mit synchrotronstrahlungsangeregter Röntgenfluoreszenzanalyse sind zerstörungsfrei und geben Auskunft über die in der untersuchten Probe vorhandenen chemischen Elemente. Bei den hier vorgestellten Untersuchungen an der BAMline stehen Fragestellungen wie Herkunft, Herstellungsverfahren und Zusammengehörigkeit von Goldfunden im Vordergrund. Die verschiedenen Fragestellungen werden an einer Reihe von Beispielen erläutert die vom Wikingerschatz aus Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten langen. Der Fund von Bernstorf wird ausführlich diskutiert.
Hochentropie-Legierungen (HEAs) zeichnen sich durch einen Mischkristall-System aus mindestens fünf und Mittelentropie-Legierungen (MEAs) durch mindestens drei Hauptlegierungselemente aus, in äquiatomarer Zusammensetzung. Sie zeigen außergewöhnliche Anwendungseigenschaften, wie z.B. hohe Festigkeit, Duktilität oder Korrosionsbeständigkeit. Zukünftige HEA/MEA-Komponenten aufgrund ihrer Eigenschaften für wasserstoffhaltige Umgebungen (wie Behälter für kryogene oder Hochdruckspeicherung) von Interesse. Daher ist die Bewertung der Wasserstoffabsorption und die Diffusion in diesen Materialien von großer Bedeutung. Dazu wurden in unserer Studie eine CoCrFeMnNi-HEA und eine CoCrNi-MEA untersucht. Die Proben wurden elektrochemisch mit Wasserstoff beladen. Für die Ermittlung des Wasserstoffdiffusionsverhaltens wurde die thermische Desorptionsanalyse (TDA) mit unterschiedlichen Heizraten bis zu 0,250 K/s angewandt. Die nachfolgende Peakentfaltung der Signale führte zu Hochtemperatur-Desorptionsspitzen und Wasserstofftrapping auch über 280°C. Eine resultierende Gesamtwasserstoffkonzentration > 40 ppm wurde für den MEA ermittelt und > 100 ppm für den HEA. Dies deutet auf zwei wichtige Effekte hin:
(1) verzögerte Wasserstoffdiffusion und (2) eine beträchtliche Menge an getrapptem Wasserstoff auch bei hoher Temperatur. Beide Effekte können hinsichtlich einer wasserstoffunterstützten Rissbildung kritisch werden, dies erfordert jedoch weitere Untersuchungen. Zusätzlich erfolgte die Bestimmung des lokalen Volta-Potentials mittels hochauflösender Kelvin-Sonden-Kraft-Mikroskopie (SKPFM). Die ermittelten Scans zeigen einen bestimmten Einfluss der Wasserstoffbeladung auf die Potentiale.
In this talk, the features of X-ray fluorescence analysis with synchrotron radiation will be presented. First, the basics of the origin of synchrotron radiation and X-ray fluorescence analysis and the experimental setup will be discussed. Then, examples of trace element detection, micrometer resolution, and application of the X-ray color camera will be shown.