Filtern
Erscheinungsjahr
Dokumenttyp
- Vortrag (164)
- Posterpräsentation (41)
- Zeitschriftenartikel (26)
- Beitrag zu einem Tagungsband (17)
- Beitrag zu einem Sammelband (11)
- Sonstiges (3)
- Buchkapitel (2)
- Corrigendum (2)
- Forschungsbericht (1)
Sprache
- Englisch (163)
- Deutsch (103)
- Mehrsprachig (1)
Referierte Publikation
- nein (267) (entfernen)
Schlagworte
- Fluorescence (67)
- Quantum yield (43)
- NIR (40)
- Nanoparticle (33)
- Quality assurance (32)
- Integrating sphere spectroscopy (31)
- Dye (27)
- Surface chemistry (22)
- Lifetime (19)
- Reference material (19)
- IR (17)
- Nano (16)
- Photophysics (16)
- Upconversion (16)
- Standard (15)
- Calibration (14)
- Quantum dot (14)
- Absolute fluorometry (13)
- Particle (13)
- Quantification (13)
- Method (12)
- SWIR (12)
- Semiconductor quantum dot (12)
- Size (12)
- Photoluminescence (10)
- Surface analysis (9)
- Deactivation pathways (8)
- Multiplexing (8)
- Nanocrystal (8)
- Optical spectroscopy (8)
- Absolute fluorescence quantum yield (7)
- Assay (7)
- Fluorescence standard (7)
- Glass (7)
- Lanthanide (7)
- Luminescence (7)
- Nanomaterial (7)
- Sensor (7)
- Nanomaterials (6)
- Nanoparticles (6)
- Quantitative spectroscopy (6)
- Standardization (6)
- Traceability (6)
- Cleavable probe (5)
- Fluorescence decay kinetics (5)
- Imaging (5)
- Measurement uncertainty (5)
- Single particle spectroscopy (5)
- Surface group analysis (5)
- Uncertainty (5)
- Upconversion nanocrystal (5)
- Upconverting nanoparticles (5)
- Flourescence (4)
- Fluorescence microscopy (4)
- Fluorescence quantum yield (4)
- Fluorescence spectroscopy (4)
- Instrument calibration (4)
- Method comparison (4)
- Modeling (4)
- Optical assay (4)
- Optical probe (4)
- Power density dependence (4)
- Reference product (4)
- Semiconductor (4)
- Spectral correction (4)
- Brightness (3)
- Conductometry (3)
- Energy transfer (3)
- FRET (3)
- Instrument performance validation (3)
- Ligand analysis (3)
- Linearity (3)
- Mechanism (3)
- Method validation (3)
- Nano particle (3)
- Near-infrared (3)
- Plasma modification (3)
- Reference data (3)
- Semiconducor nanocrystals (3)
- Single particle (3)
- Surface functionalization (3)
- Upconversion nanoparticle (3)
- Absolute flourometry (2)
- Active fibers (2)
- Analytics (2)
- Cancer (2)
- Cement (2)
- Certification (2)
- Certified reference material (2)
- Characterization (2)
- Coating (2)
- Comparability (2)
- Copolymer (2)
- Cr(III) (2)
- Emission standard (2)
- Fluorescent glasses (2)
- Fluoreszenz (2)
- Glass ceramic (2)
- Glass ceramics (2)
- Hydration (2)
- Labeling (2)
- Life sciences (2)
- Ligand (2)
- Microscopy (2)
- Multimodal reporters (2)
- Optical Spectroscopy (2)
- Optical imaging (2)
- Oxygen (2)
- PEG (2)
- Performance validation (2)
- Phosphor (2)
- Plasmonic enhancement (2)
- Polymer (2)
- Probe (2)
- Quantum dots (2)
- Quantum yields (2)
- Rare earth nanoparticles (2)
- Safety (2)
- Sensor molecules (2)
- Sensors (2)
- Silica (2)
- Silica coating (2)
- Spectral fluorescence standard (2)
- Spectroscopy (2)
- Stability (2)
- Synthesis (2)
- Thiol ligand (2)
- Upconversion nanocrystals (2)
- Upconversion nanoparticles (2)
- pH (2)
- AIE (1)
- AIS QD (1)
- Aaerosol particles (1)
- Abklingzeit (1)
- Absolute fluoreometry (1)
- Absolute measurement (1)
- Absorption (1)
- Adsorption (1)
- Aggregation (1)
- Aging (1)
- Airborne particulate pollutants (1)
- Amplification (1)
- Analytical Sciences (1)
- Analytical chemistry (1)
- Analytical sciences (1)
- Analytical services (1)
- Analytik (1)
- Automation (1)
- BAM (1)
- BODIPY (1)
- Bead (1)
- Bead-based assay (1)
- Biocompatibility (1)
- Biomarker (1)
- Biophotonic (1)
- Biophotonics (1)
- Boron Neutron Capture Therapy (BNCT) (1)
- CIEE (1)
- CLSM (1)
- Calibration slide (1)
- Calibration tool (1)
- Carbon (1)
- Catalogue of services (1)
- Cation complex (1)
- Cell (1)
- Cell imaging (1)
- Cell studies (1)
- Cement hydration (1)
- Chemical composition (1)
- Chemistry (1)
- Cleavable probes (1)
- Complex (1)
- Contrast agent (1)
- Core-shell (1)
- Core-shell architecture (1)
- Core/shell nanoparticle (1)
- Core/shell particle (1)
- Cr(III) complex (1)
- Cr(III)-Komplex (1)
- Cr-complex (1)
- Crystal (1)
- Cubical shape (1)
- Cucurbituril (1)
- Cyanine dye (1)
- Doped glass (1)
- Doped glass and glass ceramics (1)
- Dye bioconjugates (1)
- Dye labeling (1)
- Dyes (1)
- EC4SafeNano (1)
- Electrochemistry (1)
- Electron microscopy (1)
- Emission (1)
- Emission standards (1)
- Encoding (1)
- Environment (1)
- European Centre (1)
- Excitation (1)
- Exciton (1)
- Extinction coefficient (1)
- FITC (1)
- FLIM (1)
- Flow cytometry (1)
- Fluorescence intensity (1)
- Fluorescence intensity standards (1)
- Fluorescence lifetime (1)
- Fluorescence lifetime imaging (1)
- Fluorescence lifetime imaging microscopy (1)
- Fluorescence reference material (1)
- Fluorescence standards (1)
- Fluorescent dye (1)
- Fluorescent glass (1)
- Fluorescent reporter (1)
- Fluoreszenzmarker (1)
- Fluoreszenzstandards (1)
- Fluoride (1)
- Fluorometrie (1)
- Fluorometry (1)
- Fluorophore (1)
- Functional group (1)
- Functional group analysis (1)
- GenoMik und FUGATO mit Informationen aus der deutschen Genomforschung (1)
- Giant carbon dot (1)
- Heavy metal ion (1)
- Ho(III) (1)
- ICP-OES (1)
- IEC (1)
- IR fluorescence (1)
- Immunoassay (1)
- In vitro (1)
- In vivo (1)
- In vivo imaging (1)
- Indolone merocyanines (1)
- Instrument qualification (1)
- Integrating sphare spectroscopy (1)
- Integrating sphere (1)
- Integrating sphere spectroscopy, (1)
- Intensity standard (1)
- Interlaboratory comparison (1)
- Introduction of functional groups (1)
- Iron oxide (1)
- K+ doped (1)
- LT-FCM (1)
- Lanthanide chelate (1)
- Lanthanide nanoparticle (1)
- Lifetime Multiplexing (1)
- Lifetime standard (1)
- Ligand design (1)
- Ligand quantification (1)
- Liquid standard (1)
- Mass spectrometry (1)
- Materials (1)
- Medical diagnostics (1)
- Medicine (1)
- Metallionennachweis (1)
- Method development (1)
- Methos comparision (1)
- Microbiology (1)
- Microfluidics (1)
- Microparticle (1)
- Molekülspektroskopie (1)
- Multiparametric (1)
- NGFN (1)
- NIR dyes (1)
- Nano CRM (1)
- Nano-safety (1)
- Nanocarrier (1)
- Nanomanufacturing (1)
- Nanopartikel (1)
- Nanophosphor (1)
- Nanoscale luminescent reporters (1)
- Nanosensor (1)
- Nanotoxicity (1)
- Newsletter von GABI (1)
- Nicht lineare Prozesse (1)
- Nnano particle (1)
- Old nanocrystal (1)
- Optical characterization (1)
- Optical probes (1)
- Optical spectroscopie (1)
- Optical temperature sensing (1)
- Oxygen sensor (1)
- PEG ligands (1)
- PEO (1)
- Particle Label (1)
- Particle Synthesis (1)
- Particle sensors (1)
- Particle, imaging (1)
- Perovskite (1)
- Phorsphorescence (1)
- Photoluminescence quantum yield (1)
- Polycarboxylate ether (1)
- Polymer functionalization (1)
- Power density (1)
- Probe design (1)
- Protein (1)
- Quality assurcance (1)
- Quantenausbeute (1)
- Radiometrische Terminologie (1)
- Radiometry (1)
- Ratiometric (1)
- Reactions at Polymer surfaces (1)
- Reactions at polymer surfaces (1)
- Record luminescence quantum yield (1)
- Redoxschalter (1)
- Reference maerial (1)
- Reference materials (1)
- Reference nanoparticles (1)
- Rekord Luminescence Quantum Ausbeute (1)
- Release kinetics (1)
- Reliability (1)
- Rezeptoren (1)
- Rheology (1)
- Risk assessment (1)
- Rreference material (1)
- Rückführbarkeit (1)
- SAXS (1)
- Safe-by-Design (1)
- Scattering (1)
- Schwermetalle (1)
- Semiconductur (1)
- Shell (1)
- Silica and Polystyrene Particles (1)
- Single emitter (1)
- Spacer (1)
- Spectral Responsivity (1)
- Spectrofluorometer (1)
- Standards (1)
- Superplasticizers (1)
- Surface analysis; (1)
- Surface group (1)
- Surface group quantification (1)
- Surface groups (1)
- Surface labeling (1)
- Temperature (1)
- Ternary quantum dot (1)
- Thermal coupling energy level (1)
- Thiol assay (1)
- Time-resolved (1)
- Time-resolved flow cytometry (1)
- Toxicity (1)
- Transition metal complex (1)
- Upconversation nanocrystal (1)
- Upconversion luminescence (1)
- VAMAS (1)
- Validation (1)
- XPS (1)
- Yb(III) (1)
- Yb(III) complex (1)
- biotechnological (1)
- fluorescence standards (1)
- pH probe (1)
- pharmaceutical (1)
- qNMR (1)
- quality assurcance (1)
- surface group analysis (1)
- synthesis (1)
Organisationseinheit der BAM
- 1 Analytische Chemie; Referenzmaterialien (73)
- 1.2 Biophotonik (72)
- 6 Materialchemie (6)
- 6.1 Oberflächen- und Dünnschichtanalyse (5)
- 1.0 Abteilungsleitung und andere (2)
- 4 Material und Umwelt (2)
- 4.2 Material-Mikrobiom Wechselwirkungen (2)
- 5 Werkstofftechnik (2)
- 5.4 Multimateriale Fertigungsprozesse (2)
- 7 Bauwerkssicherheit (2)
Eingeladener Vortrag
- nein (164)
A series of twelve 3-piperazinyl propenylidene indolone merocyanines was synthesized in a one-pot fashion using a consecutive three-component insertion-coupling-Michael addition sequence. Physicalorganic treatment of the absorption data of a consanguineous series of this library allows semiquantitative Linear Free Energy Relationships (LFERs) to be established and confirmation of the positive Absorption solvatochromicity. All Boc-substituted piperazinyl merocyanines display aggregation induced Emission (AIE), which was corroborated for two solvent systems. In particular, crystallization-induced Emission enhancement (CIEE) induced by ultrasonication could be shown for a model chromophore by confocal laser scanning microscopy (CLSM).
Organic/inorganic mixtures were prepared from ordinary Portland cement (OPC), water (w/c 0.22), a fluorescent dye in aqueous solution (stable at alkaline pH; BAM-I), and two different comb shape polycarboxylates (PCEs), i.e., high charge (PCE-HC) and low charge (PCE-LC), respectively. Rheological and calorimetric measurements were performed prior to optical studies in order to select PCE concentrations. Absorption and fluorescence spectroscopy of the system OPC + BAM-I (CBAM-I) revealed maxima of dye BAM-I located at 645 nm and 663 nm, respectively. In presence of PCE-HC and PCE-LC, these mixtures displayed a small red shift in reflectance and a faster decrease in intensity compared to studies with CBAM-I; however, only slight differences were observed between the different PCEs. With time, all systems exhibited a decrease in intensity of BAM-I in absorption/reflectance and emission. This could be caused by dye adsorption and possibly decomposition when in contact with cement particles or hydration products.
Organic/inorganic mixtures were prepared from ordinary Portland cement (OPC), water (w/c 0.22), a fluorescent dye in aqueous solution (stable at alkaline pH; BAM-I), and two different comb shape polycarboxylates (PCEs), i.e., high charge (PCE-HC) and low charge (PCE-LC), respectively. Rheological and calorimetric measurements were performed prior to optical studies in order to select PCE concentrations. Absorption and fluorescence spectroscopy of the system OPC + BAM-I (CBAM-I) revealed maxima of dye BAM-I located at 645 nm and 663 nm, respectively. In presence of PCE-HC and PCE-LC, these mixtures displayed a small red shift in reflectance and a faster decrease in intensity compared to studies with CBAM-I; however, only slight differences were observed between the different PCEs. With time, all systems exhibited a decrease in intensity of BAM-I in absorption/reflectance and emission. This could be caused by dye adsorption and possibly decomposition when in contact with cement particles or hydration products.
There is an increasing interest in optical reporters like semiconductor quantum dots and upconversion nanophosphors with emission > 1000 nm for bioanalysis, medical diagnostics, and safety barcodes and hence, in reliable fluorescence measurements in this wavelength region, e.g., for the comparison of material performance and the rational design of new nanomaterials with improved properties. Here, we present the design of an integrating sphere setup for the absolute measurement of emission spectra and quantum yields in the wavelength region of 650 to 1600 nm and its calibration as well as examples for potential fluorescence standards from different reporter classes for the control of the reliability of such measurements.
There is an increasing interest in optical reporters like semiconductor and lanthanide-based nanocrystals with emission > 800 nm and recently also > 1000 nm for bioanalysis, medical diagnostics, and safety barcodes. Mandatory for the comparison of different emitter classes and the rational design of the next generation of reporters for the short wavelength infrared (SWIR) region are reliable and quantitative photoluminescence measurements in this challenging wavelength region. This is of special relevance for nanocrystalline emitters like semiconductor quantum dots and rods as well as for upconversion and downconversion nanocrystals, where surface states and the accessibility of emissive states by quenchers largely control accomplishable quantum yields and hence, signal sizes and detection sensitivities from the reporter side. Such measurements are currently hampered by the lack of suitable methods and standards for instrument calibration and validation as well as by the lack of quantum yield standards with emission > 800 nm and especially > 1000 nm.
In this respect, we present the design of integrating sphere setups for absolute and excitation power densitydependent measurements of emission spectra and quantum yields in the wavelength region of 650 to 1650 nm
including calibration strategies and first candidates for potential fluorescence standards. Subsequently, the photoluminescence properties of different types of nanocrystals are presented and discussed including absolute photoluminescence measurements of upconversion and down conversion emission in different solvents.