Dr
Wouter van Beek
(SNBL at ESRF)
04/07/2012, 15:50
Invited oral contribution
This presentation will focus on our recent methodological developments. Periodic external stimulations such as concentration light flux, pressure and temperature were introduced. Periodic perturbations are already used frequently in spectroscopic investigations because they enhance the sensitivity and introduce selectivity into experiments. This technique has been called Modulation Excitation...
Dr
Marco Milanesio Milanesio
(Universita' Piemonte Orientale)
04/07/2012, 16:20
Materials / Nanomaterials
Invited oral contribution
The structure of [Fe(Htrz)2(trz)]BF4 (1, Htrz )1,2,4-4-H-triazole, trz ) 1,2,4-triazolate) at the low-spin (LS) and high-spin (HS) states and structural transitions between the two states were investigated by in situ high- resolution synchrotron X-ray powder diffraction (XRPD) combined with Raman spectroscopy using a modulation-enhanced technique. The differences in the behavior of the spin...
Dr
Davide Ferri
(Empa), Dr
GIan Luca Chiarello
(Empa)
04/07/2012, 16:50
Catalysis
Oral contribution
Automotive catalysts operate under fast transients and periodic reaction conditions that are challenging to reproduce for mechanistic studies. Improved data evaluation is required to separate the contribution of dynamic species from that of typically overwhelming static signals. This is achieved by a demodulation technique that has been applied to synchrotron techniques in an effort to capture...
Ms
Mahsa Silatani
(École Polytechnique Federal de Lausanne)
04/07/2012, 17:10
Biological / Pharmaceutical Research
Oral contribution
Myoglobin (Mb) is one of the best-characterized metalloproteins found in mammalian muscle cells, which facilitates oxygen diffusion in muscle cells. It has the ability to bind small ligand molecules to the Fe atom at the center of its heme plane. Despite extensive studies, a microscopic description of ligand detachment and rebinding in Mb remains unclear. X-ray absorption spectroscopy (XAS) is...
Mrs
Mercedes Hannelore Rittmann-Frank
(Ecole Polytechnique Fedrale de Lausanne)
04/07/2012, 17:30
Materials / Nanomaterials
Oral contribution
Significant effort has been put into understanding electron/hole dynamics in electronically excited TiO2 nanoparticles (NPs) and how the kinetics of the charge carriers are affected by changes in the electronic and structural properties of such systems. This is necessary in order to understand the underlying mechanisms occurring in photocatalysis and in dye-sensitized solar cells, for which...
