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)
The oxides, hydroxides, and oxo-hydroxides of iron belong to the most abundant materials on earth. They also feature a wide range of practical applications. In many environments, they can undergo facile phase transformations and crystallization processes.
Water appears to play a critical role in many of these processes. Despite numerous attempts, the role of water has not been fully revealed yet. We present a new approach to study the influence of water in the crystallization and phase transformations of iron oxides.
The approach employs model-type iron oxide films that comprise a defined homogeneous nanostructure. The films are exposed to air containing different amounts of water reaching up to pressures of 10 bar. Ex situ analysis via scanning electron microscopy, Transmission electron microscopy, selected area electron diffraction, and X-ray diffraction is combined with operando near-ambient pressure X-ray photoelectron spectroscopy to follow water-induced changes in hematite nd ferrihydrite. Water proves to be critical for the nucleation of ematite domains in ferrihydrite, the resulting crystallite orientation, and the underlying crystallization mechanism.
In recent years, we have come to appreciate the astounding intricacy of the processes leading to the formation of minerals from ions in aqueous solutions. The original, and rather naive, ‘textbook’ image of these phenomena, stemming from the adaptation of classical nucleation and growth theories, has increased in complexity due to the discovery of a variety of precursor and intermediate species. These include solute clusters (e.g. prenucleation clusters, PNCs), liquid(-like) phases, as well as amorphous and nanocrystalline solids etc.. Does it, however, mean that all the minerals grow through intermediate phases, following a non-classical pathway?
In general, the precursor or intermediate species constitute different, often short-lived, points along the pathway from dissolved ions to the final solids (typically crystals in this context). In this regard synchrotron-based scattering (SAXS/WAXS/total scattering) appears to be the perfect tool to follow in situ and in a time-resolved manner the crystallization pathway because of the temporal and spatial length scales that can be directly accessed with these techniques. In this presentation we show how we used scattering to probe the crystallisation mechanisms of calcium sulfate, This system contains minerals that are widespread in diverse natural environments, but they are also important in various industrial settings. Our data demonstrate that calcium sulfate precipitation involves formation and aggregation of sub-3 nm anisotropic primary species. The actual crystallisation and formation of imperfect single crystals of calcium sulfate phases, takes place from the inside of the in itial aggregates. Hence, calcium sulfate follows a non-classical pathway.
Multidrug solids have a potential use to efficiently treat and control a superfluity of medical conditions.
To address the current drawbacks of drug development in R&D, it was targeted to achieve new pharmaceutical solid forms of fenamic acids having improved solubility and thermal stability. Subsequently, five new multicomponent solids consisting of three salt hydrates of trimethoprim (TMP) with mefenamic acid (TMP-MFA-H2O), tolfenamic acid (TMP-TFA-H2O) and flufenamic acid (TMP-FFA-H2O), and two cocrystals of sulfamethazine (SFZ) with flufenamic acid (SFZ-FFA) and niflumic acid (SFZ-NFA) were prepared by liquid assisted grinding. Looking at the structures of active pharmaceutical ingredient (API) molecules, it was quite expected that a wide range of supramolecular synthons would lead to cocrystallization.
New forms were characterized thoroughly by various solid-state techniques, including single crystal X-ray diffraction (SCXRD), which provided details of hydrogen bonding, molecular packing and interactions between drug and coformer. Kinetic solubility at pH 7.4 buffer study has been carried out and a comparison is made with respect to the parent drugs. A significant enhancement of NSAIDs solubility was observed in all salt hydrate systems of TMP. Thus with increasing physicochemical properties such as improved solubility further leads to the enhancement of bioavailability, which has implications to overcoming the formulation related problems of active pharmaceutical ingredients (APIs).
This chapter provides an introduction in secondary ion mass spectrometry as one of the leading surface chemical analysis and imaging techniques with molecular specificity in the field of material sciences. The physical basics of the technique are explained along with a description of the typical instrumental setups and their modes of operation. The application paragraph specifically focuses on nanoparticle analysis by SIMS in terms of surface spectrometry, imaging, analysis in organic and complex media, and depth profiling.
A review of the existing literature is provided, and selected studies are showcased. Limitations and pitfalls as well as current technical developments of SIMS application in nanoparticle surface chemical analysis are equally discussed.
Low biodegradability of graphene derivatives and related health risks are the main limiting factors for their in vivo biomedical applications. Here, we present the synthesis of enzyme-functionalized graphene sheets with self-degrading properties under physiological conditions and their applications in Tumor therapy. The synergistic enzyme cascade glucose oxidase and myeloperoxidase are covalently conjugated to the surface of graphene sheets and two-dimensional (2D) platforms are obtained that can produce sodium hypochlorite from glucose. The enzyme-functionalized graphene sheets with up to 289 nm average size are degraded into small pieces (≤40 nm) by incubation under physiological conditions for 24 h. Biodegradable graphene sheets are further loaded with doxorubicin and their ability for Tumor therapy is evaluated in vitro and in vivo. The laser-triggered release of doxorubicin in combination with the enzymatic activity of the functionalized graphene sheets results in a synergistic antitumor activity.
Taking advantage of their neutrophil-like activity, fast biodegradability, high photo- and chemotherapeutic effects, the novel two-dimensional nanoplatforms can be used for tumor therapeutic applications.
The successful off-line coupling of asymmetrical flow field flow fractionation (AF4) and capillary electrophoresis (CE) for Separation of nanoparticles (NPs) with different surface coatings was shown.
Two mixtures of polystyrene nanoparticles (PS-NPs) with comparable core sizes (20 nm and 50 nm) but different coatings (no coating/carboxyl-coated) were studied. Separation in either method resulted in non-baseline resolved or non-separated peaks. In contrast, two-dimensional off-line coupling of AF4 and CE resulted in clearly separated regions in their 2 D plots and can obviouly improve separation resolution.
Two sets of polystyrene nanoparticles (PSNPs) with comparable core sizes but different carboxyl group densities were made and separated using asymmetric flow field flow fractionation (AF4), capillary electrophoresis (CE), and the off-line hyphenation of both methods. Our results revealed the significant potential of two-dimensional off-line AF4-CE hyphenation to improve the separation and demonstrated for the first time, the applicability of CE to determine the functional group density of nanoparticles (NPs). Compared to the result acquired with conductometric titration, the result obtained with synthesized 100 nm sized PSNPs revealed only a slight deviation of 1.7%. Commercial 100 nm sized PSNPs yielded a deviation of 4.6 %. For 60 nm sized PSNPs, a larger deviation of 10.6 % between both methods was observed, which is attributed to the lower separation resolution.
Simultaneous characterization of poly(acrylic acid) andpolysaccharide polymers and copolymers
(2020)
Copolymer products that result from grafting acrylic acid and other hydrophilicmonomers onto polysaccharides have recently gained significant interest in researchand industry. Originating from renewable sources, these biodegradable, low toxicity,and polar copolymer products exhibit potential to replace polymers from fossil sourcesin several applications and industries. The methods usually employed to character-ize these copolymers are, however, quite limited, especially for the measurement ofbulk properties. With more sophisticated applications, for example, in pharmaceu-tics requiring a more detailed analysis of the chemical structure, we describe a newapproach for this kind of complex polymers. Our approach utilizes chromatographyin combination with several detection methods to separate and characterize reactionproducts of the copolymerization of acrylic acid and chemically hydrolyzed starch.These samples consisted of a mixture of homopolymer poly (acrylic acid), homopoly-mer hydrolyzed starch, and – in a lower amount – the formed copolymers. Several chro-matographic methods exist that are capable of characterizing either poly (acrylic acid)or hydrolyzed starch. In contrast, our approach offers simultaneous characterization ofboth polymers. The combination of LC and UV/RI offered insight into the compositionand copolymer content of the samples. Size exclusion chromatography experimentsrevealed the molar mass distribution of homopolymers and copolymers. FTIR inves-tigations confirmed the formation of copolymers while ESI-MS gave more details onthe end groups of hydrolyzed starches and poly (acrylic acids). Evidence of copolymerstructures was obtained through NMR measurements. Finally, two-dimensional chro-matography led to the separation of the copolymers from both homopolymers as wellas the additional separation of sodium clusters. The methods described in this work area powerful toolset to characterize copolymerization products of hydrolyzed starch andpoly(acrylic acid). Together, our approach successfully correlates the physicochemicalproperties of such complex mixtures with their actual composition.