6 Materialchemie
Filtern
Erscheinungsjahr
- 2020 (284) (entfernen)
Dokumenttyp
- Zeitschriftenartikel (158)
- Vortrag (73)
- Posterpräsentation (17)
- Beitrag zu einem Sammelband (10)
- Sonstiges (6)
- Forschungsdatensatz (5)
- Handbuch (4)
- Zeitschriftenheft (Herausgeberschaft für das komplette Heft) (4)
- Beitrag zu einem Tagungsband (3)
- Sammelband (Herausgeberschaft für den kompletten Band) (2)
Schlagworte
- Nanoparticles (41)
- Electron microscopy (14)
- Laser-induced periodic surface structures (LIPSS) (14)
- SAXS (12)
- XPS (12)
- Nanoparticle (11)
- BAMline (10)
- MALDI-TOF MS (10)
- Mechanochemistry (10)
- Particle size distribution (10)
- Nanomaterials (9)
- Synchrotron (9)
- Applications (8)
- Polylactide (8)
- Small angle scattering (8)
- TED-GC/MS (7)
- XANES (7)
- XRF (7)
- Geant4 (6)
- Laser processing (6)
- MCS (6)
- Machine learning (6)
- Nanostructures (6)
- Surface functionalization (6)
- X-ray photoelectron spectroscopy (6)
- Geant4-DNA (5)
- Gold (5)
- Imaging (5)
- Microplastic (5)
- Microstructures (5)
- Sample preparation (5)
- VAMAS (5)
- Aktivkohle (4)
- Analysis (4)
- FTIR (4)
- Monte-Carlo simulations (4)
- NanoDefine (4)
- Nanocomposite (4)
- Nanomaterial (4)
- Nanomaterial classification (4)
- Particle scattering simulation (4)
- Scattering (4)
- Shape (4)
- Simulation (4)
- Size (4)
- Small-angle X-ray scattering (4)
- Standardisation (4)
- Topas (4)
- Tribology (4)
- X-ray diffraction (4)
- X-ray scattering (4)
- AFM (3)
- Adsorption (3)
- Biofilm (3)
- Boehmite (3)
- Calcium sulfate (3)
- Catalysis (3)
- Core-shell (3)
- Corrosion (3)
- Cyclization (3)
- Dosimetry (3)
- Electrochemistry (3)
- Femtosecond laser ablation (3)
- Femtosecond laser processing (3)
- Friction (3)
- High-pressure (3)
- Imaging XPS (3)
- Inter-laboratory comparison (3)
- Laser ablation (3)
- Laser-induced periodic surface structures, LIPSS (3)
- Mass spectrometry (3)
- Microplastics (3)
- Oxygen evolution reaction (3)
- Particle scattering simulations (3)
- Particle size (3)
- Reference materials (3)
- Reproducibility (3)
- Single-source precursors (3)
- Standardization (3)
- Surface chemical analysis (3)
- Surface chemistry (3)
- TiO2 (3)
- Traceability (3)
- Wear (3)
- 3D (2)
- Adhesive strength (2)
- Automatisation (2)
- BDS (2)
- Bacteria (2)
- Bacterial adhesion (2)
- Batteries (2)
- Cancer (2)
- Capillary electrophoresis (2)
- Case studies (2)
- Coating (2)
- Cocrystal (2)
- Coded apertures (2)
- Complex oxides (2)
- Convolutional neural networks (2)
- Correlative ex-situ ellipsometric analysis (2)
- Crystallization (2)
- Cyclic (2)
- DNA (2)
- Desintegracion radioactiva (2)
- Diffraction (2)
- Diffusion (2)
- Digestion (2)
- EBSD (2)
- EC4SafeNano (2)
- EDS (2)
- EXAFS (2)
- Ellipsometric operando investigation (2)
- Epoxy (2)
- Field of View (2)
- Functionalization (2)
- Grafting (2)
- Graphene (2)
- Graphene oxide (2)
- High repetition rate (2)
- High-entropy alloy (2)
- Hydrogen (2)
- Hydrogen economy (2)
- Image analysis (2)
- Image segmentation (2)
- Interfaces (2)
- Ionization (2)
- Iron oxide nanoparticles (2)
- Iterative reconstruction (2)
- LC-MS (2)
- Laser-induced breakdown spectroscopy (2)
- Laser-induced oxide layer (2)
- Materialbearbeitung (2)
- Mesoporous iridium oxides films (2)
- Metrology (2)
- Microbiologically influenced corrosion (2)
- Microplastic particles (2)
- Microprinting (2)
- Microscopy (2)
- Mikroplastik (2)
- Mikroplastik-Massengehalte (2)
- Monte-Carlo simulation (2)
- Método de Montecarlo (2)
- Nano (2)
- Nanocomposites (2)
- Nanosafety (2)
- Nanostructure (2)
- Nanotechnology (2)
- Niobium (2)
- Normung (2)
- Nucleation (2)
- PDF (2)
- Phase transition (2)
- Polycarbonate (2)
- Polymer (2)
- Polymers (2)
- ROPPOC (2)
- Radiation protection (2)
- Radioactive decay (2)
- Radioactive nanoparticle (2)
- Reference Material (2)
- Reference material (2)
- Regulation (2)
- Rigid amorphous fraction (2)
- Risk assessment (2)
- SAXS/WAXS (2)
- SEM (2)
- SOP (2)
- Scanning kelvin probe force microscopy (2)
- Scientific rigor (2)
- Semiconductor (2)
- Silver nanoparticle (2)
- Simulations (2)
- Small-area XPS (2)
- Small-spot XPS (2)
- Software (2)
- Soil (2)
- Spectroscopic ellipsometry (2)
- Spectroscopy (2)
- Stability (2)
- Standards (2)
- Starch (2)
- Starch nanoparticle (2)
- Synthesis (2)
- TEM (2)
- TMDSC (2)
- Thermal decomposition (2)
- Thermoanalytik (2)
- Thermogravimetrie (2)
- Thickness (2)
- Thin films (2)
- ToF-SIMS (2)
- Transmission Kikuchi Diffraction (TKD) (2)
- Transmission electron microscopy (2)
- Trinkwasser (2)
- Ultrakurze Laserimpulse (2)
- Wasseraufbereitung (2)
- X-ray fluorescence spectroscopy (2)
- XRD (2)
- nanoparticula (2)
- (Quantitative) Structure-Active Relationships (1)
- 266nm (1)
- 29Si (1)
- 2D (1)
- 2D chromatography (1)
- 2PP (1)
- 3D printing (1)
- 3D-printing (1)
- 89Y MAS-NMR (1)
- A4F (1)
- ACEnano (1)
- AISI 304L (1)
- APTES (1)
- ATZ (1)
- Abasic site (1)
- Abbildende Ellipsometrie (IE) (1)
- Absorbed dose (1)
- Academic fraud (1)
- Academic metrics (1)
- Additive Manufacturing (1)
- Additive manufacturing (1)
- Adhesion (1)
- Adhesives (1)
- Advanced Oxidation (1)
- Advanced calorimetry (1)
- Ag (1)
- Agarose gel electrophorese (1)
- Aging (1)
- Alkali-activated materials (1)
- Alkali-silica reaction (1)
- Alkaline earth metal coordination polymers (1)
- Alloys (1)
- Alpha-tricalcium phosphate (1)
- Alumina toughened zirconia (1)
- Aluminium (1)
- Amyloid (1)
- Analysis area measurements (1)
- Anodization (1)
- Antibacterial (1)
- Antibiotic delivery (1)
- Antibiotic release (1)
- Antimicrobial titanium coating (1)
- Application (1)
- Archäometrie (1)
- Artificial digestion (1)
- Artificial neural network modelling (1)
- Atom probe tomography (1)
- Atomic Forc Microscopy (1)
- Au (1)
- Au-nanocubes (1)
- AuNP (1)
- Auger Electron Spectroscopy (1)
- Automated analysis (1)
- BET (1)
- BNP (1)
- Bacterial attachment (1)
- Bassanite (1)
- Bending modulus (1)
- Bimetallic noble metal nanoparticles (1)
- Bimodal (1)
- Bimodal size distribution (1)
- Binder Jetting (1)
- Bio-orthogonal chemistry (1)
- Bio-weathering (1)
- Bioceramics (1)
- Biocorrosion (1)
- Biofilm growth (1)
- Biofilm quantification (1)
- Bioinspiration (1)
- Biomaterials (1)
- Biomimetic surfaces (1)
- Biomimetics (1)
- Bionic materials (1)
- Bismuth (1)
- Black fungi (1)
- Blends (1)
- Bonding strength (1)
- Boronic acid (1)
- Boronic acid-functionalized 2D MoS2 (1)
- Broadband Dielectric Spectrscopy (1)
- C++ (1)
- CEN (1)
- CEN/TC 352 Nanotechnologies (1)
- CPD (1)
- Cadmium and lead remediation (1)
- Cancer therapy (1)
- Carbon Nanotubes (1)
- Carbon materials (1)
- Carbon nanotubes (1)
- Carboxyl group (1)
- Catalogue of Services (CoS) (1)
- Cell (1)
- Cell-repellent surfaces (1)
- Cellulose acetate (1)
- Centrifugal Adhesion Testing (CAT) (1)
- Centrifugal adhesion testing (CAT) (1)
- Ceramic matrix composites (1)
- Ceramic nano particles (1)
- Characterisation (1)
- Characterization method (1)
- Charge (1)
- Chemisorption (1)
- Chemistry (1)
- Classification (1)
- Cmake (1)
- Coaggregation (1)
- Coatings (1)
- Cocrystals (1)
- Coded Aperture (1)
- Coded aperture (1)
- Columnar Liquid Crystal (1)
- Comparability (1)
- Compatible solute (1)
- Complementary methodology and metrology (1)
- Composite strength (1)
- Compound strength (1)
- Concentration (1)
- Controlled morphology (1)
- Coordination chemistry (1)
- Coordination polymer (1)
- Coordination polymers (1)
- Copolymer (1)
- Copper nanoparticles (1)
- Copper sulfides (1)
- Corona Discharge (1)
- Correlative imaging (1)
- Corrosion resistance (1)
- Counterions (1)
- Covalent interactions (1)
- Crystal engineering (1)
- Crystal structure (1)
- Crystalstructure (1)
- Cyclic Voltammetry (1)
- DFT calculation (1)
- DFT calculations of Raman spectra (1)
- DNA base damage (1)
- DNA damage (1)
- DNA melting temperature (1)
- DNA protection (1)
- DNA strand-break (1)
- Damage (1)
- Data analysis (1)
- Data corrections (1)
- Data correlation (1)
- Data curation (1)
- Data manipulation (1)
- Data organization (1)
- Debian (1)
- Definition (1)
- Degradation signatures (1)
- Dendritic polyglycerol (1)
- Density separation (1)
- Deuterium (1)
- Direct laser interference patterning (1)
- Direct laser interference patterning (DLIP) (1)
- Discotic Liquid Crystals (1)
- Dosimetrie (1)
- Double complex compound (1)
- Dynamic behavior (1)
- EDX (1)
- EMPIR (1)
- EPMA (1)
- ESI-TOF MS (1)
- EU (1)
- Ectoine (1)
- Ectoine DNA protection (1)
- Ectoine UV absorption (1)
- Ectoine hydration (1)
- Ectoine-DNA binding (1)
- Effective dose (1)
- Electrocatalysis (1)
- Electrochemical treatment (1)
- Electrolysis (1)
- Electromagnetic scattering (1)
- Electromagnetic theories (1)
- Electron probe microanalysis (1)
- Electrons (1)
- Electrospinning (1)
- Elektronenmikroskopie (1)
- Elemental composition (1)
- Elemental mapping (1)
- Encapsulation (1)
- Energiedosis (1)
- Energy dose (1)
- Entropy (1)
- Environment (1)
- Equivalent dose (1)
- Escherichia coli (1)
- Ettringen tuff (1)
- European Centre (1)
- European funding strategies (1)
- Exchange interaction (1)
- Excited states (1)
- Exploratory analysis (1)
- Extracellular polymeric substances (1)
- Extrusion (1)
- FIB (1)
- Failure pattern (1)
- FeNi (1)
- Femtosecond laser (1)
- Femtosecond laser-processing (1)
- Fermi resonance (1)
- Ferrihydrite (1)
- Ferromagnetism (1)
- Fiber toxicology (1)
- Field of view (1)
- Finite-difference time-domain calculations (1)
- Flexible crystals (1)
- Flexural rigidity (1)
- Flow system (1)
- Fluorescence (1)
- Fluoride (1)
- Fluorides (1)
- Fluorine coordination (1)
- Form factor (1)
- Formaldehyde (1)
- Formation enthalpy (1)
- Forsterite (1)
- Framework (1)
- Fuel sorption (1)
- Functional materials (1)
- Functionalized graphene (1)
- Gas flow assisted powder deposition (1)
- Gas sorption (1)
- Gastrointestinal barrier (1)
- Gekrümmte Oberflächen (1)
- Geothermal (1)
- Geringe Partikelfrachten (1)
- Git (1)
- Glue (1)
- Gradient elution (1)
- Graphen Oxide (1)
- Graphitization (1)
- Gypsum' SAXS (1)
- HF (1)
- Hazard assessment (1)
- Heat capacity (1)
- Hematite (1)
- Hierarchical structures (1)
- High Entropy Alloys (1)
- High density polyethylene (1)
- High entropy alloy (1)
- High pressure (1)
- High-entropy alloys (1)
- High-pressure high-temperature (1)
- History (1)
- Holzschutzmittel (1)
- Homogeneous deposition (1)
- Hydrofluorination (1)
- Hydrogen evolution reaction (1)
- Hydroxyectoine (1)
- Hydroxyl radicals (1)
- Hyperspectral data (1)
- ICP-OES (1)
- INADEQUATE (1)
- ISO (1)
- ISO/TC 229 (1)
- Identification (1)
- Image manipulation (1)
- Image reconstruction (1)
- Imaging surface chemical analysis (1)
- Imaging techniques (1)
- In situ (1)
- In situ PXRD (1)
- In-situ (1)
- In-situ polymerization (1)
- Inelastic background (1)
- Intensity scale calibration (1)
- Interlaboratory comparision (1)
- Interlaboratory comparison (1)
- Intrinsic OER activity (1)
- Introduction (1)
- Iridium compounds (1)
- Iron (1)
- Iron nanoparticles (1)
- Iron oxide (1)
- Iron reducing bacteria (1)
- Jacobsen-Stockmayer theory (1)
- Kleine Partikel (1)
- Knock-out mutant (1)
- Künstliche Intelligenz (1)
- LC-UV (1)
- LLG (1)
- Landau Lifshitz equation (1)
- Lanthanide (1)
- Lanthanides (1)
- Lanthanoide (1)
- Laser (1)
- Laser-induced micro- and nanostructures (1)
- Laser-induced periodic surface strctures (LIPSS) (1)
- Laser-induced x-ray emission (1)
- Lateral resolution (1)
- Lateral surface pattern (1)
- Layer thickness of transparent coatings (1)
- Layer-by-layer deposition (1)
- Lead ions (1)
- Lifetime (1)
- Ligandsubstitution (1)
- Linear (1)
- Linux (1)
- Liquid chromatography (1)
- Literature survey (1)
- Lithium-ion battery (1)
- Low-density polyethylene (LDPE) (1)
- Luminescence (1)
- MALDI (1)
- MCC (1)
- MDG ICP-ToF-MS (1)
- MOFs (1)
- Macrophagen (1)
- Magnetic moment (1)
- Magnetic nanoparticles (1)
- Magnetometry (1)
- Marine corrosion (1)
- Mass content (1)
- Material-binding Peptides (1)
- Matter reorganization theories (1)
- Measurement methodology (1)
- Measurement uncertainty (1)
- Mechanical properties (1)
- Mechanochemical synthesis (1)
- Medical implants (1)
- Medium Entropy Alloys (1)
- Melanin Adhesion (1)
- Mesoporous iridium oxide films (1)
- Metadata structuring (1)
- Metal (1)
- Metal and alloys (1)
- Metal fluorides (1)
- Metal nanoparicels (1)
- Methane (1)
- Methanogen (1)
- Method (1)
- Method development (1)
- Methodology (1)
- Microbeam analysis (1)
- Microbiological Corrosion (1)
- Microdosimetry (1)
- Microdroplet generator (1)
- Micromagnetism (1)
- Microplastic analysis (1)
- Microplastic mass contents (1)
- Microstructure (1)
- Microstructure-property relations (1)
- Mikroplasik (1)
- Mikroplastik-Analyse (1)
- Mild steel (1)
- Mitochondria (1)
- Modeling (1)
- Modelling (1)
- Molecular VOx catalysts (1)
- Multi-scale measurements (1)
- Multiport (1)
- Multivariate Datenanalyse (1)
- Multivariate analyses (1)
- Mussel-inspired adhesives (1)
- Müller-Matrix Ellipsometrie (MM-IE) (1)
- NAP-XPS (1)
- NEXAFS (1)
- NIR (1)
- NMR probe Development (1)
- Nafion 117 (1)
- Nano particles (1)
- Nano-ceramic-additive-manufacturing photoresin (1)
- Nano-characterisation (1)
- Nano-object (1)
- Nano-related data (1)
- Nano-risk assessment (1)
- NanoCAM (1)
- Nanobiointerfaces (1)
- Nanocubes (1)
- Nanoinformatics (1)
- Nanomaterial properties (1)
- Nanoparticle size distribution (1)
- Nanoparticle synthesis (1)
- Nanopartikel (1)
- Nanoplatform (1)
- Nanoplattform (1)
- Nanosafety services (1)
- Nanostructuring (1)
- Natural language processing (1)
- Near-field spectroscopy (1)
- Neural network (1)
- Neural networks (1)
- Neutron Scattering (1)
- Nickel nanoparticles (1)
- Non-destructive ambient analysis (1)
- Non-destructuve testing (1)
- Noncovalent interactions (1)
- Nuclear magnetic resonance (1)
- Nucleus (1)
- OH scavenger (1)
- OOMMF (1)
- Oberflächenanalytik (1)
- Oberflächenstrukturierung (1)
- Object oriented micromagnetic framework (1)
- Operando (1)
- Optische Konstanten (1)
- Oral uptake (1)
- Ordered mesoporous carbon (1)
- Osmium (1)
- Oxidation (1)
- Oxygen Evolution Reaction (1)
- PBS (1)
- PET (1)
- PQQ (1)
- PVDF-Based membrane (1)
- Particle (1)
- Particle architecture (1)
- Particle number concentration (1)
- Particle scattering (1)
- Particle shape (1)
- Peptide (1)
- Peptide Library (1)
- Phase diagrams (1)
- Phase transformation (1)
- Phosphorus fertilizer (1)
- Photoelectrochemistry (1)
- Photoluminescence (1)
- Photophysics (1)
- Physicochemical characterization (1)
- Plasma treatments (1)
- Plasmonic nanofocusing (1)
- Plastic deformation (1)
- Plastics (1)
- Platinum (1)
- Platinum group metals (1)
- Platinum-ruthenium colloid (1)
- Pollen (1)
- Polycarbonate-co-dimethylsiloxane copolymer (1)
- Polyethylene glycol (1)
- Polymer analysis/characterization (1)
- Polymer membranen (1)
- Polymer nanocomposite (1)
- Polymer of intrinsic microporosity (1)
- Polymer-binding Peptides (1)
- Polynorbornenes (1)
- Polynorbornes (1)
- Polypropylene (1)
- Polyurethane acetate vinyl acrylate (1)
- Polyvinyl formaldehyde foam (1)
- Pore orientation (1)
- Pore space (1)
- Pore structure (1)
- Porous carbons (1)
- Position of carboxylate group (1)
- Potentiodynamic Polarization (1)
- Predictive modelling (1)
- Preferential exclusion (1)
- Preferred orientation (1)
- Preparation (1)
- Primer (1)
- Prodrug antibiotic (1)
- Propolis (1)
- Prüfgeschwindigkeiten (1)
- Pseudo-translationalsublattices (1)
- Pull-off test (1)
- Pyrolysis (1)
- QUASES (1)
- Quality assurance (1)
- Quantification (1)
- Quantum dot (1)
- Quantum yield (1)
- Quartzite rock (1)
- Quasielastic neutron scattering (1)
- REDOR (1)
- REPT-HMQC (1)
- Radiation (1)
- Radiation damage (1)
- Radiation therapy (1)
- Radical scavenger (1)
- Raman (1)
- Raman spectroscopy (1)
- Rapid Analysis (1)
- Rare earth elements separations (1)
- Reference data (1)
- Reference nanomaterials (1)
- Reference spectra (1)
- Referenzdaten (1)
- Referenzmaterial (1)
- Refractory alloys (1)
- Reliable characterization (1)
- Renewable copolymers (1)
- Repelling surface coatings (1)
- Resins (1)
- Resonance frequency (1)
- Rhodiumcomplexes (1)
- Ring-opening Polymerisation (1)
- Ring-opening polymerization (1)
- Ringversuche (1)
- Roadmap (1)
- Rosin (1)
- Rroughness and step heights (1)
- Röntgenstrahlung (1)
- SC-ICP-ToF-MS (1)
- SEC (1)
- SEM/EDS (1)
- SSB (1)
- STEM-in-SEM (TSEM) (1)
- SYBR gold (1)
- Safe-by-design (1)
- Saline brine (1)
- Salt (1)
- Sample peparation (1)
- Saponite (1)
- Saxs (1)
- Scaffold (1)
- Scanning Kelvin Probe Force Microscopy (1)
- Scanning white light interferometry (1)
- Schichtdicke (1)
- SchwarzP cells (1)
- Scientific misconduct (1)
- Secondary ion mass spectrometry (1)
- Selected area XPS (1)
- Selective oxidation (1)
- Self-assembly (1)
- Self-degrading (1)
- Self-organization (1)
- Separation (1)
- Sewer structures (1)
- Shell (1)
- SiGe (1)
- SiO2 (1)
- Siderite (1)
- Silane (1)
- Silica (1)
- Silicon (1)
- Single cell analysis (1)
- Single crystal (1)
- Single particle (1)
- Size and size distribution (1)
- Size distribution (1)
- Size measurement (1)
- Slurry (1)
- Small Area XPS (1)
- Small-angle scattering (1)
- Solid state NMR (1)
- Solid-binding Peptides (1)
- Solubility (1)
- Spectral induced polarization (1)
- Stainless Steel (1)
- Standard Operation Procedures (1)
- Standard operation procedures (1)
- Standardarbeitsanweisung (1)
- Standardisierung (1)
- Stannosilicates (1)
- Statistischen Untersuchung (1)
- Stochastic Landau Lifshitz Gilbert equation (1)
- Strahlenschutz (1)
- Strontium titanate (1)
- Structural Analysis (1)
- Structural color (1)
- Stumpfklebungen (1)
- Sulfates (1)
- Sulfuric acid resistance (1)
- Sunscreen (1)
- Superconductivity (1)
- Superior sorbent (1)
- Surface (1)
- Surface Activation (1)
- Surface analysis (1)
- Surface charge (1)
- Surface chemisttry (1)
- Surface coating (1)
- Surface modification (1)
- Surface plasmon polaritons (1)
- Surface processing (1)
- Surface superconductivity (1)
- Surface-initated grafting (1)
- Suspended organic matter (1)
- Systems architecture (1)
- TGA (1)
- TGA-FTIR (1)
- TGA-MS (1)
- TOPAS (1)
- TOPAS-nBio (1)
- TXRF (1)
- Targeted nanoparticle (1)
- Temperature (1)
- Temperature scaling (1)
- Termites (1)
- Terpolymer (1)
- Tetraethyl orthosilicate (1)
- Textile binder (1)
- Therapy (1)
- Thermal analysis (1)
- Thermal desorption analysis (1)
- Thermal desorption mass spectrometry (1)
- Thermoanalytical (1)
- Thermoanalytische Verfahren (1)
- Thermoset composition (1)
- Thetaevolve (1)
- Thiourea-formaldehyde (1)
- Threshold (1)
- Thumor therapy (1)
- Ti6Al4V alloys (1)
- Time-of-flight secondary ion mass spectrometry (1)
- Tire Wear (1)
- Tire wear (1)
- Titania nanoparticles (1)
- Titanium dioxide (1)
- Tools (1)
- Topas-nbio (1)
- Total Scattering (1)
- Traceability derivation (1)
- Transmission function (1)
- Trends (1)
- Triazine (1)
- Two-photon polymerization (1)
- UV absorption (1)
- UV irradiation (1)
- UV photons (1)
- UV protection (1)
- UV-A (1)
- UV-B (1)
- UV-C (1)
- UV-Vis (1)
- UV-irradiation (1)
- Ultrashort pulse laser processing (1)
- Ultrasonic Nebulization (1)
- Upconversion (1)
- Urban (1)
- VRF (1)
- VRFB (1)
- Vanadium speciation (1)
- Vergleichsuntersuchungen (1)
- Vinyl monomer (1)
- Volatiles from thermosets (1)
- Volume specific surface area (1)
- WAXS (1)
- Wasserstoff (1)
- Wastewater treatment (1)
- Water (1)
- Water stability (1)
- Water treatment (1)
- Weathering (1)
- Weibern tuff (1)
- X-ray Fluorescence (1)
- X-ray absorption spectroscopy (1)
- X-ray fluorescence imaging (1)
- X-ray generation (1)
- X-ray imaging (1)
- X-ray instrumentation (1)
- X-ray refraction (1)
- X-ray spectroscopy (1)
- X-rays (1)
- XAS (1)
- Xrays (1)
- Yttrium silicates (1)
- ZIF-8 (1)
- Zentrifugentechnologie (1)
- Zinc oxide (1)
- Zinc phosphate (1)
- Zwitterion (1)
- electrocatalysis (1)
- nPSize (1)
- nanostructured (1)
- µ-CT (1)
Organisationseinheit der BAM
- 6 Materialchemie (284) (entfernen)
Paper des Monats
- ja (3)
Eingeladener Vortrag
- nein (73)
New coordination polymers with 2D network structures with fluorine directly coordinated to the metal ion were prepared both via mechanochemical synthesis and fluorolytic sol–gel synthesis. Depending on the synthesis route, the samples show different particle sizes, according to SEM imaging. The crystal structures of barium acetate fluoride, strontium acetate fluoride, and lead acetate fluoride (BaFIJCH3COO), SrFIJCH3COO) and PbFIJCH3COO)) were solved from X-ray powder diffraction data. The structure solution is backed by the results from 19F MAS NMR, FT IR data, and thermal analysis. The calculated chemical shifts of the 19F MAS NMR spectra coincide well with the measured ones. It turns out that the grinding conditions have a remarkable influence on the mechanochemical synthesis and its products. Our systematic study also indicates a strong influence of the atomic radii of Ca, Sr, Ba, and Pb on the success of the syntheses.
DNA basierte Dosimetrie
(2020)
We propose the development of a standardized DNA based dosimeter. This dosimeter will improve the comparability between the results of different laboratories in radiation research. Compared to conventional methods in dosimetry, this Approach provides direct access to the relation between radiation interaction and biological damage. Moreover, it enables the systematic investigation of the relation between the microscopic characteristics of radiation and DNA damage over a wide dose range.
In recent years, the improved understanding of the formation of laser-induced periodic surface structures (LIPSS) has led to an emerging variety of applications that modify the optical, mechanical, and chemical properties of many materials. Such structures strongly depend on the laser beam polarization and are formed usually after irradiation with ultrashort linearly polarized laser pulses. The most accepted explanation for the origin of the structures is based on the interference of the incident laser radiation with electromagnetic surface waves that propagate or scatter at the surface of the irradiated materials. This leads to an intensity modulation that is finally responsible for the selective ablation in the form of parallel structures with periods ranging from hundreds of nanometers up to some micrometers. The versatility when forming such structures is based on the high reproducibility with different wavelengths, pulse durations and repetition rate laser sources, customized micro- and nanometric spatial resolutions, and compatibility with industrially relevant processing speeds when combined with fast scanning devices. In this contribution, we review the latest applications in the rapidly emerging field of surface functionalization through LIPSS, including biomimetic functionalities on fluid transport, control of the wetting properties, specific optical responses in technical materials, improvement of tribological performance on metallic surfaces, and bacterial and cell growth for medical devices, among many others.
Calcium alkali phosphates Ca(Na,K)PO4 are main constituents of bioceramics and thermochemically produced phosphorus fertilizers because of their bioavailability. Sparse thermodynamic data are available for the endmembers CaNaPO4 and CaKPO4. In this work, the missing data were determined for the low-temperature phase modifications of the endmembers CaNaPO4 and CaKPO4 and three intermediate Ca(Na,K)PO4 compositions. Standard enthalpy of formation ranges from - 2018.3 ± 2.2 kJ mol-1 to - 2030.5 ± 2.1 kJ mol-1 and standard entropy from 137.2 ± 1.0 J mol-1 K-1 to 148.6 ± 1.0 J mol-1 K-1 from sodium endmember b-CaNaPO4 to potassium endmember b0-CaKPO4.
Thermodynamic functions are calculated up to 1400 K for endmembers and the sodium-rich intermediate phase b-Ca(Na0.93K0.07)PO4. Functions above 640 K are extrapolated because of the phase transition from low- to high-temperature phase. Impurities in the synthesized intermediate phases c-Ca(Na0.4K0.6)PO4 and c-Ca Na0.35K0.65)PO4 and one additional phase transition around 500 K impeded the determination of high-temperature thermodynamic functions. In general, data for phase transition temperatures agree with the previously reported phase diagrams.
Nickel nanoparticles are an active research area due to their multiple applications as catalysts in different processes. A variety of preparation techniques have been reported for the synthesis of these nanoparticles, including solvothermal, microwave-assisted, and emulsion techniques. The well-studied solvothermal oleylamine synthesis route comes with the drawback of needing standard air-free techniques and often space-consuming glassware. Here, we present a facile and straightforward synthesis method for size-controlled highly monodisperse nickel nanoparticles avoiding the use of, e.g., Schlenk techniques and space-consuming labware. The nanoparticles produced by this novel synthetic route were investigated using small-angle X-ray scattering, transmission electron microscopy, X-ray diffraction, and X-ray spectroscopy. The nanoparticles were in a size range of 4–16 nm, show high sphericity, no oxidation, and no agglomeration after synthesis.
A new kind of high melting (HTm) pol(L-lactide) was discovered when cyclic poly(L-lactide)s were prepared by ring-expansion polymerization with cyclic tin catalysts at 130–160 °C in bulk. By DSC measurements with 10 K min−1 melting temperatures (Tm) in the range of 190–196 °C were found. The WAXS and SAXS measurements evidenced that not a new crystal lattice but a well-ordered morphology and a higher perfection of the crystallites are responsible for the high Tm values and high crystallinities. Under identical reaction conditions SnOct2-catalyzed and alcohol-initiated ROPs do not yield these crystallites.
Furthermore, it was found that the standard crystallites are kinetically favored upon rapid crystallization, whereas the high melting form of poly(L-lactide) is thermodynamically more stable.
The small-pore framework sodium stannosilicate AV-10, chemical composition Na2SnSi3O9⋅2H2O and known crystallographic structure, was synthesized by hydrothermal crystallization. This stannosilicate is built up of a three-dimensional network of corner-shared SiO4 tetrahedra and SnO6 octahedra. The SnO6 sites are linked to six SiO4 tetrahedra (Sn(6Si)) while each of the two crystallographically different SiO4 units are connected to two SnO6 and SiO4 units (Si(2Si,2Sn)). This material was used as model compound for developing a solid-state MAS NMR strategy aimed on the challenges and possibilities for structural studies, particularly considering the short and medium range order to verify the connectivity of SiO4 and SnO6 of such compounds despite the low natural abundances of 4.68% for 29Si and 8.59% for 119Sn nuclei as a real challenge. 29Si{119Sn} and 119Sn{29Si} REDOR (Rotational-Echo Double-Resonance) NMR measurements after 1H cross-polarization (CP) were carried out. The REDOR curves show a significant change after the “normal” quadratic short time evolution from which both (i) the shortest internuclear 29Si – 119Sn distances (and vice versa) and (ii) the number of corner-sharing SiO4 tetrahedra around the SnO6 octahedra (and vice versa) can be obtained. Based on these data, optimized 29Si {119Sn} and 119Sn{29Si} REPT-HMQC (Recoupled Polarization Transfer-Heteronuclear Multiple-Quantum Correlation, again after 1H CP) experiments were implemented, which directly show those heterogroup connectivity as correlation peaks in a 2D spectrum. This information was also obtained using 2D29Si{119Sn}-J-Coupling NMR experiments. Furthermore, 2D29Si INADEQUATE NMR experiments are also feasible, showing the connectivity of SiO4 tetrahedra. The combination of REDOR, REPT-HMQC, J-Coupling and INADEQUATE experiments yielded a complete analysis of the short and medium range structure of this microporous stannosilicate, in agreement with the previously published structure obtained Ab Initio from powder X-Ray diffraction data (XRD).
The adsorption of organic micropollutants onto activated carbon is a favourable solution for the treatment of drinking water and wastewater. However, these adsorption processes are not sufficiently understood to allow for the appropriate prediction of removal processes. In this study, thermogravimetric analysis, alongside evolved gas analysis, is proposed for the characterisation of micropollutants adsorbed on activated carbon. Varying amounts of carbamazepine were adsorbed onto three different activated carbons, which were subsequently dried, and their thermal decomposition mechanisms examined. The discovery of 55 different pyrolysis products allowed differentiations to be made between specific adsorption sites and conditions. However, the same adsorption mechanisms were found for all samples, which were enhanced by inorganic constituents and oxygen containing surface groups. Furthermore, increasing the loadings led to the evolution of more hydrated decomposition products, whilst parts of the carbamazepine molecules were also integrated into the carbon structure. It was also found that the chemical composition, especially the degree of dehydration of the activated carbon, plays an important role in the adsorption of carbamazepine. Hence, it is thought that the adsorption sites may have a higher adsorption energy for specific adsorbates, when the activated carbon can then potentially increase its degree of graphitisation.
Hydrogen features a very high specific energy density and is therefore a promising candidate for clean fuel from renewable resources. Water electrolysis can convert electrical energy into storable and transportable hydrogen gas. Under acidic conditions, platinum is the most active and stable monometallic catalyst for the hydrogen evolution reaction (HER). Yet, platinum is rare and needs to be used efficiently. Here, we report a synthesis concept for colloidal bimetallic platinum–ruthenium and rhodium–ruthenium nanoparticles (PtRuNP, RhRuNP) and their incorporation into ordered mesoporous carbon (OMC) films. The films exhibit high surface area, good electrical conductivity and well-dispersed nanoparticles inside the mesopores. The nanoparticles retain their size, crystallinity and composition during carbonization. In the hydrogen evolution reaction (HER), PtRuNP/OMC catalyst films show up to five times higher activity per Pt than Pt/C/Nafion® and PtRu/C/Nafion® reference catalysts.
The electrocatalytic conversion of water into molecular hydrogen and oxygen under the utilization of excess renewable energies, such as wind power, photovoltaics and hydroelectric power is one possible pathway to establish a sustainable hydrogen economy. The obtained hydrogen is either stored and used in a fuel cell or consumed on-site in industrial applications.
Water electrolysis systems (WES) are based on two half cell reactions, such as oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) which both proceed simultaneously. The OER suffers from slow reaction kinetics and thus limits the overall performance.
The most promising compounds in acidic electrolysis are IrO2 and RuO2. Due to their rare abundance and extremely high price a wide use of acidic WES was prevented. Lowering the catalysts noble metal content by mixing iridium with titanium reduces the production costs.
Thin films are produced by dip coating a solution of metal oxide precursors alongside with a polymer template dissolved in ethanol. The obtained samples are subsequently calcined to the remove the template and adjust crystallinity. Finally, an additional iridium deposition step was performed on the outer surface plane area.
Understanding the influence of structural and morphological aspects on the OER-activity is beneficial to further optimize WES. The current presentation will thus give detailed insights to structural aspects obtained by Raman spectroscopy, small- and wide-angle X-ray scattering which are then combined with electrochemical parameters to deduce structure-activity relationships.