A5062542554- Laser-Matter Interactions and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Fiber Laser Technologies
- biodegradable polymer synthesis and properties
- Recycling and Waste Management Techniques
- Advanced Fluorescence Microscopy Techniques
- Photonic Crystal and Fiber Optics
- Spectroscopy and Chemometric Analyses
- Microplastics and Plastic Pollution
- Manufacturing Process and Optimization
- Spectroscopy and Quantum Chemical Studies
- Carbon dioxide utilization in catalysis
- Nanoparticles: synthesis and applications
- Additive Manufacturing and 3D Printing Technologies
- Surface Modification and Superhydrophobicity
- Chemistry and Chemical Engineering
- Nanoparticle-Based Drug Delivery
- Polymer crystallization and properties
- X-ray Diffraction in Crystallography
- Photoacoustic and Ultrasonic Imaging
- Crystallization and Solubility Studies
- Protein Interaction Studies and Fluorescence Analysis
- Laser-induced spectroscopy and plasma
- CO2 Reduction Techniques and Catalysts
- Polymer Surface Interaction Studies
Robert Bosch (Germany)
2009-2025
BASF (Germany)
2009-2023
Materials and Systems Research (United States)
2021
BASF (United States)
2021
Philipps University of Marburg
2005-2010
Bangor University
2006
Max Planck Institute of Quantum Optics
2004
Max Planck Society
2004
Abstract Nanocomposites are the dominating class of nanomaterials to come into consumer contact, and were in general assumed pose low risk. The first data is now emerging on exposure from nanocomposites, but little yet known about their hypothetical nanospecific physiological effects, giving ample room for speculation. For time, this comprehensive study addresses these aspects a systematic series thermoplastic cementitious nanocomposite materials. Earlier reports that ‘chalking’, release...
Machine learning can aid the discovery of useful 3D printing material formulations.
Abstract Following the circular economy hierarchy of reduce and reuse, recycling is third layer to close loops for materials decouple their value from consumption. Polymeric (“plastics”) are in principle well suited recycling, as they can be reprocessed with relatively low energy input a material, cleaved back into monomers or converted feedstock. Today, these approaches still fall short quantitatively diverting waste towards reuse. This perspective describes industry challenges high...
Here, we explore the effect of copolymer chemistry on phase behavior and viscoelasticity complex coacervates. To this end, utilized a library methacrylate copolymers with varying charge densities hydrophobicity. Our results show that changing density hydrophobicity drastically affects behavior─with dictating salt stability controlling polymer concentration Small-amplitude oscillatory shear measurements were used to study viscoelastic response coacervates, leveraging knowledge coacervate in...
The combination of broadband pulses from a photonic crystal fiber (PCF) pumped by standard 100 fs oscillator and pulse shaping is successfully employed for coherently controlled nonlinear spectroscopy. shaper manages not only to compress the PCF supercontinuum in closed-loop optimization scheme but also manipulate phase at same time quantum control applications. This approach demonstrated single-beam coherent anti-Stokes Raman microspectroscopy should be, due its simplicity, well suited...
Lung lining fluid is the first biological barrier nanoparticles (NPs) encounter during inhalation. As previous inhalation studies revealed considerable differences between surface functionalized NPs with respect to deposition and toxicity, our aim was investigate influence of lipid and/or protein binding on these processes. Thus, we analyzed a set including different SiO2 ZrO2 in pure phospholipids, CuroSurfTM purified native porcine pulmonary surfactant (nS). Lipid surprisingly low for...
Circular Economy This frontispiece reflects upon the perspective article 2100488 by Hannah Mangold and Bernhard von Vacano. Plastics waste on left side, used as feedstock in chemical recycling, can be circled back into demanding engineering plastics applications, for example an electric vehicle housing battery electronics, connectors cables (Image credit BASF SE).
Single-beam coherent anti-Stokes Raman-scattering (CARS) microspectroscopy achieves a complete CARS scheme with femtosecond laser. Here, we introduce heterodyne detection in simple experimental extension: the optical fields driving process and local oscillator used for heterodyning are derived from single beam of ultrashort laser pulses by pulse shaping. The signal is amplified more than 3 orders magnitude linearly dependent on concentration Raman scatterers. This dramatically increases...
Abstract Broadband multiplex coherent anti‐Stokes Raman scattering (MCARS) microscopy allows the rapid chemical mapping and molecular imaging of untreated material samples with three‐dimensional sectioning capabilities. It can be realized a single laser in simple robust setup using supercontinuum generation microstructured fiber. The successful implementation MCARS microscope is discussed detail, its parameters are characterized, applications shown for identification polymer blends. An...
Polyelectrolyte complexation is an entropically driven, associative phase separation that results in a polymer-rich polyelectrolyte complex (PEC) and polymer-poor supernatant. PECs show promise as new class of sustainable materials since they can be processed using aqueous solutions rather than organic solvents. Previous reports have looked at the mechanical properties glass transitions function temperature, relative humidity (rH), salt concentration (CS), but establishing universal...
The characterization and control of the phase broadband femtosecond pulses in nonlinear microscopy are successfully demonstrated with a collinear configuration spectral shear interferometry for direct electric field reconstruction (SPIDER). A femtosecond-pulse shaper is used as dispersionless interferometer measurement to actively compress supercontinuum from photonic crystal fiber. This allows situ online management enables application quantum spectroscopy microenvironments.
A single-beam implementation of coherent anti-Stokes Raman scattering (CARS) allows experimentally very much simplified and flexible approaches to time-resolved vibrational spectroscopy, with the additional benefit microscopic spatial resolution. To achieve this, a broadband femtosecond laser is combined pulse shaper creating tailored sequences by computer control. We discuss theoretical foundations technical issues technique in detail show successful different schemes for truly...
Abstract In single‐beam coherent anti‐Stokes Raman spectroscopy (CARS), a complete four‐wave‐mixing scheme is accomplished within single pulse from an ultrashort femtosecond oscillator. Spectral information achieved by control of the non‐linear signal generation using phase modulation excitation with shaper. This approach can be even extended to heterodyne detections schemes wherein strong local oscillator (LO) field, also generated shaping same laser, interferes CARS signal. Here, we...
In situ characterization and control of the phase broadband femtosecond pulses in microscopy can be achieved with a novel simplified scheme based on spectral shear interferometry for direct electric field reconstruction (SPIDER): use pulse shaper eliminates need an interferometer setup, allows dispersion-free SPIDER operation at same time compression even complex pulses. Beyond compression, precise site microscopic experiment. We present underlying principles, design considerations, details...
Abstract Mechanical recycling is a decisive contribution for sustainable circular economy of polypropylene (PP) but faces the challenge processing‐induced and use‐phase accumulated molecular damage, exacerbated by multiple loop recycling. In this contribution, origin degradation PP under up to 30 repetitive reprocessing loops analyzed together with influence stabilization, processability data linked changes entire weight distribution. By comparison experiments simple Monte Carlo simulations,...
Abstract In single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy, a complete CARS scheme is accomplished with tailored pulses from fs‐oscillator by control of the nonlinear signal generation. Here, application to low‐wavenumber vibrational modes in range 50–400 cm −1 demonstrated investigating pure liquid‐phase samples and molecules solution. The spectral resolution (17 ) achieved process an order magnitude better than width excitation (150 FWHM). At same time, nonresonant...
By combining several surface analytical tools, we show that an adsorbed layer of the protein H*Protein B prevents adsorption secondary proteins bovine serum albumin, casein, or collagen at low-salinity conditions and pH 8. is industrially producible fusion hydrophobin family, known for its high interfacial activity. While applications have been reported to facilitate adhesion under different conditions, careful analysis by quartz-crystal microbalance ellipsometry prove no additional can be...
We used precision cut lung slices (PCLS) to study the cytotoxicity of cobalt ferrite nanomaterials with and without bovine serum albumin (BSA) stabilization. Using mitochondrial activity as an indicator (WST-1 assay) increasing concentrations nanomaterial caused levels in PCLS irrespective BSA However, there was no increase released lactate dehydrogenase (LDH) by stabilized indicating concentration depended cytotoxictiy. Moreover, non-stabilized a decrease background LDH culture supernatant...
A single beam of shaped femtosecond pulses is used to coherently control the Raman excitation and simultaneously observe resulting vibrations molecules in a mixture resolved time. This experimentally simple scheme opens up exciting new possibilities for selective detection dangerous chemical or bacterial species, such as spores, will serve enhance contrast nonlinear imaging.
The growth of a thermally deposited merocyanine (HB364) thin film can be modified through insertion transition metal oxide layer between an indium tin (ITO) covered glass substrate and the dye film. Pure or V2O5 ITO substrates result in highly crystalline HB364 films where molecules adopt edge-on orientation. Changing to WO3 MoO3 results less ordered with mixed face-on orientations. Planar HB364/C60 heterojunction (PHJ) solar cells are fabricated using different oxides as anode buffer...
The phase transfer of quantum dots to water is an important aspect preparing nanomaterials that are suitable for biological applications, and although numerous reports describe ligand exchange, very few efficient encapsulation techniques. In this report, we not only report a new method transferring (QDs) using amphiphilic protein (hydrophobin) but also the advantages molecule with available functional groups their use in imaging cancer cells vivo other applications.