Concept

Synchrotron light source

Publications associées (380)

Visualization of water drying in porous materials by X-ray phase contrast imaging

We present in this study results from X-ray tomographic microscopy with synchrotron radiation performed both in attenuation and phase contrast modes on a limestone sample during two stages of water drying. No contrast agent was used in order to increase th ...

Wiley-Blackwell2015

High Frequency Effects of Impedances and Coatings in the CLIC Damping Rings

Eirini Koukovini Platia

The Compact Linear Collider (CLIC) is a 3 TeV e+e- machine, currently under design at CERN, that targets to explore the terascale particle physics regime. The experiment requires a high luminosity of 2x10^34 cm^2 s^-1, which can be achieved with ultra low ...

EPFL2015

Simultaneous generation of mild acidic functionalities and small supported Ir NPs from alumina-supported well-defined iridium siloxide

Florent Emmanuel Héroguel, Olga Safonova

We report the simultaneous formation of small Ir nanoparticles and silica–alumina from a well-defined iridium siloxide precursor grafted on alumina. Treatment of the alumina-supported iridium surface complex with H2 leads to the formation of small and narr ...

Elsevier2015

Interplay between electronic and structural properties in the Pb/Ag(100) interface

Marco Grioni, Alberto Crepaldi, Simon Karl Moser

We report an investigation of the structural and electronic properties of a Pb monolayer (ML) grown on Ag(1 0 0), by combining x-ray photoelectron diffraction (XPD) and angle resolved photoelectron spectroscopy (ARPES). The Pb atoms are found to arrange in ...

Iop Publishing Ltd2015

Analysis of Femtosecond Electron Bunches at the SwissFEL Injector Test Facility

Bennie Smit

The SwissFEL (Swiss Free Electron Laser) is a free electron laser which is being built at the Paul Scherrer Institute. The SwissFEL will be a user facility to study processes on unexplored scales of space and time. In order to achieve these aims, X-ray pul ...

EPFL2015

Templating Sol-Gel Hematite Films with Sacrificial Copper Oxide: Enhancing Photoanode Performance with Nanostructure and Oxygen Vacancies

Kevin Sivula, Nestor Guijarro Carratala, Yang Li, Xavier Adrian Jeanbourquin, Mathieu Steven Prévot, Yuehui Li

Nanostructuring hematite films is a critical step for enhancing photoelectrochemical performance by circumventing the intrinsic limitations on minority carrier transport. Herein, we present a novel sol-gel approach that affords nanostructured hematite film ...

Amer Chemical Soc2015

Direct Evidence of Surface Reduction in Monoclinic BiVO4

Cécile Hébert, Daniele Passerone, Rolf Erni, Piyush Agrawal

Local measurements of the oxidation state of vanadium in monoclinic BiVO4 particles by means of electron energy-loss spectroscopy in scanning transmission electron microscopy reveal a pronounced surface reduction: within a 5-nm-thick shell, the oxidation s ...

Amer Chemical Soc2015

Probing wavepacket dynamics using ultrafast x-ray spectroscopy

Majed Chergui, Ursula Röthlisberger, Ivano Tavernelli, Thomas James Penfold, Gloria Capano

The advent of x-ray free electron lasers is providing new opportunities for probing the ultrafast excited state dynamics using structurally sensitive techniques. Herein we use excited state wavepacket dynamics of a prototypical Cu(I)-phenanthroline complex ...

2015

Ultrafast nonadiabatic fragmentation dynamics of biomolecules

Ivano Tavernelli, Pablo Lopez Tarifa, Yang Wang

Fragmentation of doubly charged biomolecules, uracil and amino acids, has been investigated using different ab inito Molecular Dynamics Methods. Time-Dependent Density Functional Theory Molecular Dynamics give a description of the non-adiabatic effects, th ...

Iop Publishing Ltd2014

A compact synchrotron-based transmission X-ray microscope

Giorgio Margaritondo, Ying Chen

A compact transmission X-ray microscope has been designed and implemented based on a cylindrical symmetry around the optical axis that sharply limits the instabilities due to thermal mechanical drift. Identical compact multi-axis closed-loop actuation modu ...

Wiley-Blackwell2014

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