Video Talk - Slides
BIOGRAPHY
Rosina Celeste Ponterio Researcher at the CNR-IPCF. She received her master degree in Physics on March 1993 at University of Messina. In 2000 she obtained her Ph.D. degree at the laser spectroscopy laboratory of Physics Department at Messina university. From 2001 she holds a permanent position as researcher at CNR, Istituto per i Processi Chimico-Fisici.
The research of Dr. Ponterio focuses on the various application vibrational spectroscopy, in particular Raman spectroscopy (SERS, Raman, Ft-Raman) and most in general on laser based spectroscopy techniques in the field of materials science. Her interest is also in neutrons based techniques (especially diffraction, tomography and neutron imaging) and in development of neutron instrumentation, in this field, in fact, she has been carrying out researches and experiments at European facilities of ISIS (Uk). Since 2006 to the present, she was Principal Investigator of a number of neutron experiments performed at STFC-ISIS neutron source and she is part of the IPCF – CNR Messina team of researchers who, within PANAREA project, designed and implemented an energy resolved tomographic (neutron) chamber and installed in the IMAT beamline at the RAL (UK).
ABSTRACT
Tailored nano-materials in diagnostic of cultural heritage
The Cultural Heritage of a nation defines memory, traditions and life of the people that lived before us and it must be kept in a good condition for the generation who will be after us. In this framework gain a central role any strategic action devoted to preventive conservation of our Cultural Heritage. On the other hand no conservation action is possible without a deep knowledge of the object, archaeological site or museum collection we aim to preserve. Diagnostic represents the first step for any plan of conservative strategy. In the last years a number of advances experimental techniques, especially non-invasive ones, and innovative ad-hoc tailored designed nanostructured materials gained an huge attention in diagnostics of objects of interest for our Cultural Heritage. Historically Raman spectroscopy is the most used non-destructive technique for the analysis of pigments and art objects most in general. However, conventional Raman spectra are heavily affected by the intense fluorescence of the dyes that can hide the Raman peaks, a drawback that often occurs mainly in the case of organic pigments. Such organic molecules in fact, are highly fluorescent, making their identification through Raman spectroscopy very difficult if not impossible. Surface Enhanced Raman Scattering (SERS) spectroscopy allows for overcoming the issues associated with fluorescence. SERS represents an active research area with important applications, ranging from surface chemistry to biological chemistry and materials analysis. Also conservation and restoration of cultural goods requires a detailed knowledge of the materials (pigments, binders, supports) of which they are made up. Here we present a low cost and ad-hoc designed SERS substrates able to quench the pigments fluorescence and to enhance the Raman signal.
[1]Viviana Mollica Nardo, Alessandro Sinopoli, Lara Kabalan, Rosina C Ponterio, Franz Saija, Sebastiano Trusso SERS and DFT study of indigo adsorbed on silver nanostructured surface, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 205, 465-469 (2018)
[2]E Fazio, F Neri, R Ponterio, S Trusso, M Tommasini, P Ossi, Laser controlled synthesis of noble metal nanoparticle arrays for low concentration molecule recognition, Micromachines 5 (4), 1296-1309 (2014)
