Piero Baglioni is currently Full Professor of Physical Chemistry and lecturer of Physical Chemistry of Disperse Systems and Interfaces at the Department of Chemistry of the University of Florence. He has been appointed as Visiting Scientist/Professor by several laboratories such as the Department of Chemistry of the University of Houston, the Weizmann Institute, the Collège de France, and M.I.T. He is the Director of the National Consortium for Nanosystems (CSGI) and in the Advisory Board and reviewer of several international journals and International organization (European Science Foundation (ESF), National Science Foundation (NSF)). He is member of the scientific board of several national and international Institutions, industries (Italcementi, FAST, HMI, etc.) and Journals, coordinator of several National and European Union’s projects.David Chelazzi is a research fellow at the Department of Chemistry of the University of Florence. His research interests and expertise include the consolidation of wall painting, cleaning of artworks, deacification of paper, wood and canvas. Recent work has been concerned with the synthesis and characterisation of nanoparticles for cultural heritage conservation and nanostrcutured cleaning fluids.