Eventi
Lunedì 11 marzo 2019 alle ore 11.00
presso l’Aula 1 dell’Edificio F
Area della Ricerca CNR
Via Madonna del Piano, 10 Sesto F.no (Firenze)
la Dott.ssa Barbara Rossi
dell'IUVS beamline, Elettra-Sincrotrone
Trieste, Italia
terrà il seminario:
"Synchrotron-based UV Resonance Raman at Elettra - Sincrotrone Trieste: an innovative spectroscopy facility for material science"
Raman spectroscopy has a wide applicability to most forms of matter since it is a non-destructive methodology for providing molecular information on solids, liquids, gels, polymers and bio-macromolecules trough the investigation of their vibrational motions. Thanks to the resonance effect, UV Resonant Raman (UVRR) scattering offers several advantages with respect to spontaneous Raman spectroscopy, such as the significant increment of the detection limit and the selectivity of the enhancement of the vibrational modes associated to specific chromophores present in the system. These conditions, together with the strong reduction of the interfering fluorescence background, determines the usefulness of UVRR spectroscopy for the study of many open issues in the material science. In the past few years, there was a growing in the use of UVRR spectroscopy in diverse research fields mainly due to the advancements in laser technology and the development of high efficiency array detectors for the entire UV-visible region. However, the conventional laser sources suffer from the limitation of providing fixed wavelength energies, while tunable excitation radiation in the UV range allows to “map” the whole resonance landscape for matching with the best experimental conditions.
In this contribution, I will introduce the potentialities of the unique in the world UVRR facility working with the synchrotron radiation available at Elettra Sincrotrone Trieste (www.elettra.eu), a multidisciplinary international research centre of excellence, specialized in generating high quality synchrotron and free-electron laser light for applying it in materials and life sciences. The synchrotron-based UVRR setup available at Elettra enables to perform UVRR experiments with a fine tunable source in the range of excitation wavelengths 200-270 nm, resulting is an innovative spectroscopy facility for approaching open issues in physics, biology, chemistry and material science. Selected case studies will be discussed in order to show the useful of UVRR method and the areas of interactions with other research interests. Finally, I will illustrate the possibilities of the free of charge access to the facility that is granted to all interested external users through the peer-reviewed proposal system.