A5022966049- Spectroscopy and Quantum Chemical Studies
- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Advanced Chemical Physics Studies
- Electrochemical Analysis and Applications
- Laser-Matter Interactions and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Mass Spectrometry Techniques and Applications
- Muon and positron interactions and applications
- Calcium Carbonate Crystallization and Inhibition
- Minerals Flotation and Separation Techniques
- DNA and Nucleic Acid Chemistry
- Chemical and Physical Properties in Aqueous Solutions
- Atomic and Molecular Physics
- Catalytic Processes in Materials Science
- Organic Electronics and Photovoltaics
- Amino Acid Enzymes and Metabolism
- Photochemistry and Electron Transfer Studies
- Electronic and Structural Properties of Oxides
- Cancer therapeutics and mechanisms
- Molecular Sensors and Ion Detection
- Electron Spin Resonance Studies
- Epigenetics and DNA Methylation
- Perovskite Materials and Applications
University of Zurich
2020-2023
ETH Zurich
2020-2021
Universidade Federal do Paraná
2016-2017
Femtosecond X-ray absorption spectroscopy (XAS) is a powerful method to investigate the dynamical behavior of system after photoabsorption in real time. So far, application this technique has remained limited large-scale facilities, such as femtosliced synchrotrons and free-electron lasers (FEL). In work, we demonstrate femtosecond time-resolved soft-X-ray liquid samples by combining sub-micrometer-thin flat jet with high-harmonic tabletop source covering entire water-window range (284-538...
The ionization energy of liquid water is one its most fundamental properties, an important benchmark for first-principles electronic-structure calculations and a crucial reference in the growing field liquid-phase photoelectron spectroscopy. Despite this significance, consensus on value appears to be missing literature. Therefore, we use monochromatized high-harmonic light source perform detailed measurements presence tunable bias voltage applied jet. Our results suggest that simple method...
Carboxylic acids bind to titanium dioxide (TiO2) dissociatively, forming surface superstructures that give rise a (2 × 1) pattern detected by low-energy electron diffraction. Exposing this system water, however, leads loss of the highly ordered structure. The formate-covered was investigated combination diffraction and spectroscopy techniques, together with static dynamic ab initio simulations, conclusion equilibrium exists between adsorbed formic acid water molecules. This process is an...
We report integral cross sections (ICSs) for both positron and electron scattering by glycine alanine amino acids. These molecules differ only a methyl group. computed the using Schwinger multichannel method in different levels of approximation projectiles. The ICSs are greater magnitude than scattering, probably due to larger size molecule. In calculations, we found two resonances each Glycine presents one at 1.8 eV, another centered around 8.5 static-exchange plus polarization (SEP)...
We report the first systematic photoelectron measurements of three outer-valence bands liquid water as a function ionizing photon energy in near-threshold region. use extreme-ultraviolet (XUV) radiation tunable between ∼17.1 and 35.6 eV, obtained through monochromatization high-harmonic source. show that absolute values apparent vertical ionization energies their respective peak widths decreasing trend magnitudes with increasing close to threshold. find observed effects do not only depend on...
We report calculated elastic integral (ICS) and differential (DCS) cross sections for positron collisions with C3H6 isomers, propene cyclopropane. The ICSs computations were performed the Schwinger multichannel method, at static plus polarization level of approximation from 0.001 up to 8 eV. These are compared only experimental total (TCSs) available in literature low energy scattering by these isomers [Makochekanwa C et al 2008 Phys. Rev. A 77 042717]. Even though there significant...
Epigenetic modifications of cytosine have been found to influence differently in many processes biological systems. In order investigate the differences electron attachment different epigenetic cytosine, we reported A″ component integral cross section scattering by (C) and its 5-methylcytosine (5mC), 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC), 5-carboxylcytosine (5caC). Our results were obtained with Schwinger multichannel method pseudopotentials static-exchange (SE) plus...
We explore ultrafast charge transfer (CT) resonantly induced by hard X-ray radiation in organic thiophene-based polymers at the sulfur K-edge. A combination of core-hole clock spectroscopy with real-time propagation time-dependent density functional theory simulations gives an insight into electron dynamics underlying CT process. Our method provides control over a selective excitation specific resonance atom monochromatic radiation. combined experimental and theoretical investigation...
We explore ultrafast charge transfer (CT) resonantly induced by hard x-ray radiation in organic thiophene-based polymers at the sulfur K-edge. A combination of core-hole clock spectroscopy with real-time propagation time-dependent density functional theory simulations gives an insight into electron dynamics underlying CT process. Our method provides control over a selective excitation specific resonance atom monochromatic radiation. combined experimental and theoretical investigation...
The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity systems with practicality heterogeneous systems. stability is, however, far less than that traditional electrocatalysts, therefore a method to easily replace anchored have degraded could make such electrosynthetic more attractive. Here, we apply non-covalent “click” chemistry approach reversibly bind electrocatalysts via host-guest complexation surface-anchored cyclodextrins....
We demonstrate femtosecond time–resolved soft–X–ray absorption spectroscopy of liquid samples by combining a sub–micrometer–thin flat jet with high–harmonic table–top source covering the entire water-window range (284 - 538 eV). Our work represents first extension table-top XAS to oxygen edge chemical sample in phase. In time domain, our measurements resolve gradual appearance features below carbon K-edge ethanol and methanol during strong–field ionization, which trace valence-shell...
The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity systems with practicality heterogeneous systems. stability is, however, far less than that traditional electrocatalysts, therefore a method to easily replace anchored have degraded could make such electrosynthetic more attractive. Here, we apply non-covalent “click” chemistry approach reversibly bind electrocatalysts via host-guest complexation surface-anchored cyclodextrins....
The strategy of anchoring molecular catalysts on electrode surfaces combines the high selectivity and activity systems with practicality heterogeneous systems. stability is, however, far less than that traditional electrocatalysts, therefore a method to easily replace anchored have degraded could make such electrosynthetic more attractive. Here, we apply non-covalent “click” chemistry approach reversibly bind electrocatalysts via host-guest complexation surface-anchored cyclodextrins....
We demonstrate femtosecond time–resolved soft–X–ray absorption spectroscopy of liquid samples by combining a sub–micrometer–thin flat jet with high–harmonic table–top source covering the entire water-window range (284 - 538 eV). Our measurements temporally resolve gradual appearance features below carbon K-edge ethanol and methanol during strong–field ionization, which trace valence-shell ionization dynamics alcohols temporal resolution ~30 fs.