A5051048387- Advanced Chemical Physics Studies
- Atmospheric Ozone and Climate
- Spectroscopy and Quantum Chemical Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Atmospheric chemistry and aerosols
- Inorganic Fluorides and Related Compounds
- Quantum and electron transport phenomena
- Electron and X-Ray Spectroscopy Techniques
- Graphene research and applications
- Photochemistry and Electron Transfer Studies
- Molecular Junctions and Nanostructures
- Photocathodes and Microchannel Plates
- Atmospheric and Environmental Gas Dynamics
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Topological Materials and Phenomena
- Semiconductor materials and devices
- nanoparticles nucleation surface interactions
- Quantum, superfluid, helium dynamics
- Per- and polyfluoroalkyl substances research
- Porphyrin and Phthalocyanine Chemistry
- Iron oxide chemistry and applications
- Advanced Electron Microscopy Techniques and Applications
- Advanced X-ray Imaging Techniques
- Climate Change and Geoengineering
École Polytechnique Fédérale de Lausanne
2017-2024
Paul Scherrer Institute
2024
ETH Zurich
2023
Charles Humbert 8
2017-2020
Sapienza University of Rome
2015-2018
National Interuniversity Consortium for the Physical Sciences of Matter
2015-2016
The photophysics of ferricyanide in H<sub>2</sub>O, D<sub>2</sub>O and ethylene glycol was studied upon excitation ligand-to-metal charge transfer (LMCT) transitions by combining ultrafast photoelectron spectroscopy (PES) liquids transient vibrational spectroscopy.
Experimental characterization of the structural, electronic and dynamic properties dilute systems in aqueous solvents, such as nanoparticles, molecules proteins, are nowadays an open challenge. X-ray absorption spectroscopy (XAS) is probably one most established approaches to this aim it element-specific. However, typical interest often composed light elements that require extreme-ultraviolet soft photons. In spectral regime, water other solvents rather opaque, thus demanding radical...
The search in two-dimensional condensed matter systems of Rashba-type spin-polarized electronic states is aimed by the possibility to control and manipulate spin orientation. In this Letter, for first time, we report on experimental evidence a splitting n=1 image potential state. state Rashba here measured at graphene/Ir(111) interface, as confirmed theoretical considerations, can be detectable any metal surface with significant spin-orbit coupling.
Carbon K-edge resonant Auger spectra of gas-phase allene following excitation the pre-edge 1s → π* transitions are presented and analysed with support EOM-CCSD/cc-pVTZ calculations.
2D Resonant Auger maps showing the site-specific excitations in butadiene.
Earth’s atmosphere comprises a complex mix of gas and condensed phases, where phases facilitate multiphase chemical reactions that would not occur in the phase alone. These drive dynamic physical processes across various spatial temporal scales, playing crucial role cycling atmospheric trace constituents. Multiphase chemistry significantly influences geochemical cycles, human health, climate. This review focuses on steps governing important species, such as halogens, reactive nitrogen,...
The photochemistry of metal-organic compounds in solution is determined by both intra- and inter-molecular relaxation processes after photoexcitation. Understanding its prime mechanisms crucial to optimise the reactive paths control their outcome. Here we investigate photoinduced dynamics aqueous ferrioxalate ([FeIII(C2O4)3]3-) upon 263 nm excitation using ultrafast liquid phase photoelectron spectroscopy (PES). initial step found be a ligand-to-metal electron transfer, occuring on time...
Abstract We report on the C K-edge x-ray absorption spectra and resonant (RXES) non-resonant (NXES) emission of ethylene, allene butadiene in gas phase. The RXES NXES show clear differences for different molecules. Overall both types are more structured ethylene allene, than butadiene. Using density functional theory–restricted open shell configuration interaction single calculations, we simulate with remarkable agreement experiment. identify spectral features as being due to transitions...
Harmonium is a vacuum ultraviolet (VUV) photon source built within the Lausanne Centre for Ultrafast Science (LACUS). Utilising high harmonic generation, photons from 20-110 eV are available to conduct steady-state or ultrafast photoelectron and photoion spectroscopies (PES PIS). A pulse preserving monochromator provides either energy resolution (70 meV) temporal (40 fs). Three endstations have been commissioned for: a) PES of liquids; b) angular resolved (ARPES) solids and; c) coincidence...
The photoelectron spectra of both liquid and gas phase aromatic molecules are reported. were obtained using a 34.1 eV source produced by high harmonic generation analysed with the help high-level ab initio simulations reflection principle combined path integral molecular dynamics accounting for nuclear quantum effects phase. We demonstrate suitability three trimethylbenzenes (1,3,5-trimethylbenzene, 1,2,3-trimethylbenzene 1,2,4-trimethylbenzene) as solvent spectroscopy solute species. also...
We present an ambient pressure X-ray photoelectron spectroscopy investigation of the adsorption ammonia on ice over temperature range -23 °C to -50 °C. Previous flow tube studies have shown significant uptake at these temperatures, which was linked incorporation ammonium into crystal lattice. Our shows a interface, with concentrations exceeding those measured in past for case bulk snow and ice. also indication that some is protonated surface thus adsorbed there as ions. The impact high...
Recent studies have suggested that injection of solid particles such as alumina (Al2O3) and calcite (CaCO3) instead SO2 for stratospheric aerosol intervention could reduce some the adverse side effects SAI ozone depletion, heating, changes in diffuse radiation. However, expected improvements from alteration chemistry are subject to large uncertainties. We constrain these uncertainties by experimental work on using elastic recoil detection analysis (ERDA) in-situ experiments X-ray...