A5044232145- Ultrasonics and Acoustic Wave Propagation
- Thermography and Photoacoustic Techniques
- Laser-Matter Interactions and Applications
- Advanced Fiber Optic Sensors
- Non-Destructive Testing Techniques
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Fatigue and fracture mechanics
- Optical measurement and interference techniques
- Structural Health Monitoring Techniques
- Advanced Measurement and Metrology Techniques
- Metal Forming Simulation Techniques
- Block Copolymer Self-Assembly
- Surfactants and Colloidal Systems
- X-ray Diffraction in Crystallography
- Metallurgy and Material Forming
- Thermoelastic and Magnetoelastic Phenomena
- Laser Material Processing Techniques
- Numerical methods in engineering
- Semiconductor Lasers and Optical Devices
- Welding Techniques and Residual Stresses
- Fire effects on concrete materials
- Geophysical Methods and Applications
- Material Properties and Failure Mechanisms
European School of Management and Technology
2024
Max Planck Institute of Quantum Optics
2016-2020
Ludwig-Maximilians-Universität München
2016-2020
Max Planck Institute for Nuclear Physics
2018
Griffith University
2018
Quantum (Australia)
2018
American University of Sharjah
2018
National Research Council Canada
2018
University of Münster
2017
LMU Klinikum
2017
Light- and small-angle neutron scattering as well cryo-transmission electron microscopy (cryo-TEM) studies were performed to probe the structure of J-aggregates formed by a series achiral dye molecules 5,5',6,6'-tetrachlorobenzimidacarbocyanine chromophore having 1,1'-dialkyl substituents combined with 3,3'-bis(4-sulfobutyl)-3,3'-bis(4-carboxybutyl) or 3,3'-bis(3-carboxypropyl) substituents. Assemblies that display dependence on different complex supramolecular structures...
Proton migration is a ubiquitous process in chemical reactions related to biology, combustion, and catalysis. Thus, the ability control movement of nuclei with tailored light, within hydrocarbon molecule holds promise for far-reaching applications. Here, we demonstrate steering hydrogen simple hydrocarbons, namely acetylene allene, using waveform-controlled, few-cycle laser pulses. The rearrangement dynamics are monitored coincident 3D momentum imaging spectroscopy, described...
Thermal transitions and morphological changes in Cloisite organoclays were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, situ simultaneous small-angle X-ray scattering (SAXS) wide-angle diffraction (WAXD) over the temperature range of 30-260 degrees C. On basis DSC FTIR results, surfactant component was found to undergo a melting-like order-disorder transition between 35 50 The temperatures peaks...
Background Electroconvulsive therapy (ECT) is one of the most effective treatments for severe depression. However, little known regarding brain functional processes mediating ECT effects. Method In a non-randomized prospective study, magnetic resonance imaging data during automatic processing subliminally presented emotional faces were obtained twice, about 6 weeks apart, in patients with major depressive disorder (MDD) before and after treatment (ECT, n = 24). Additionally, control sample...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynchrotron SAXS study of the microphase separation transition in diblock copolymersT. Wolff, C. Burger, and W. RulandCite this: Macromolecules 1993, 26, 7, 1707–1711Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/ma00059a033https://doi.org/10.1021/ma00059a033research-articleACS PublicationsRequest reuse permissionsArticle...
Selected features of nonsequential double ionization have been qualitatively reproduced by a multitude different (quantum and classical) approaches. In general, however, the typical uncertainty laser pulse parameters restricted number observables measured in individual experiments leave room for adjusting theoretical results to match experimental data. While this has hampering assessment approaches leading conflicting interpretations, comprehensive data that would allow such an ultimate...
The complexation of a carboxylate functionalized hexabenzocoronene with an amino polysiloxane results in polymeric complex, which forms two highly ordered discotic columnar liquid crystalline structures Col1 and Col2. By using small-angle X-ray scattering it was shown that four columns per unit cell are two-dimensionally oblique lattices. An order–order transition from to Col2 detected at about 90 °C. lattice constants = b 5.0 nm γ 112°, 5.5 108°. As structural consequence the heights within...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSmall-Angle X-ray Scattering Study of Lamellar Microdomains in Diblock Copolymers the Weak Segregation RegimeT. Wolff, C. Burger, and W. RulandCite this: Macromolecules 1994, 27, 12, 3301–3309Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10.1021/ma00090a025https://doi.org/10.1021/ma00090a025research-articleACS PublicationsRequest reuse permissionsArticle...
Metal nanotip photoemitters have proven to be versatile in fundamental nanoplasmonics research and applications, including, e.g., the generation of ultrafast electron pulses, adiabatic focusing plasmons, as light-triggered sources for microscopy. Here, we report high energy photoelectrons (up 160 eV) photoemission from single-crystalline nanowire tips few-cycle, 750-nm laser fields at peak intensities (2-7.3) × 1012 W/cm2. Recording carrier-envelope phase (CEP)-dependent allows us identify...
A closed-form analytical solution for the inversion of integral equation relating small-angle scattering intensity distributions two-phase systems to chord-length is presented. The result generalized arbitrary derivatives higher order autocorrelation function and projections (including slit collimation). This inverse transformation offers an elegant way investigate impact certain features, e.g. singularities, in distribution or its higher-order on curve, oscillatory components asymptotic...
Abstract This work investigates the suppression of individual harmonics, simultaneously affecting specific even and odd orders in high-harmonic spectra generated by strongly tailored, two-colour, multi-cycle laser pulses neon. The resulting are systematically studied as a function electric-field shape symmetry-broken (ω–2ω) symmetry-preserved (ω–3ω) configuration. peak is reproduced macroscopic strong-field approximation calculations found to be unique fields (ω–2ω). Additionally,...
A spectral study is performed to gain insight into the effects of relaxation times and thermomechanical coupling on dynamic thermoe Iastic responses in generalized thermoelasticity. The hyperbolic thermoelastic theories Lord Schulman (LS) Green Lindsay (GL) are selected for study. characteristic equation derived investigate dispersion behavior waves as functions time constants. Thermomechanical found impose a significant influence phase velocities. GL model implicitly indicates that order...
Intense, multi-color laser fields permit the control of ionization atoms and steering electron dynamics. Here, we present efficient collinear creation second third harmonic a 790 nm femtosecond followed by versatile field synthesizer for three color fields' composition. Using device, investigate strong-field neon composed fundamental, or harmonic. The three-color device offers sufficient flexibility coherent processes time-resolved pump-probe studies.
Block copolymers made of polystyrene and fluorinated blocks represent a new class polymers with very strong incompatibility between the two blocks. They exhibit stable block copolymer mesophases which are not considered in phase diagrams diblock super-strong segregation regime. The solid-state structures different compositions characterized by synchrotron small-angle X-ray scattering transmission electron microscopy, thus proving existence quadratically perforated layer 2D sanidically...
We have investigated nuclear dynamics in bound and dissociating acetylene molecular ions a time-resolved reaction microscopy experiment with pair of few-cycle pulses. Vibrating cations or dications are produced by the first pulse. The second pulse probes ionization to higher charge states Coulomb explosion molecule. For cations, we observed vibrations (HCCH) its isomer vinylidene (CCHH) along CC-bond periodicity around 26 fs. dication molecules, clear indication enhanced is found occur CH-...
Two conflicting methods reported in the literature [Kratky (1933). Kolloid Z. 64 , 213–222; Leadbetter & Norris (1979). Mol. Phys. 38 669–686] for relationship between axial orientation distributions and equatorial intensity profiles are analyzed. Both common use by their respective proponents evaluation of scattering patterns with preferred under rotational symmetry. The correctness these is assessed, consequences findings discussed.
We investigate the carrier-envelope phase (CEP) and intensity dependence of longitudinal momentum distribution photoelectrons resulting from above threshold ionization argon by few-cycle laser pulses. The pulses with a center wavelength 750 nm is varied in range between 0.7 × 1014 . Our measurements reveal prominent maximum CEP-dependent asymmetry at photoelectron energies 2 UP (UP being ponderomotive potential), that persistent over entire range. Further local maxima are observed around 0.3...