This project is based on the studies performed during the internship in the European Laboratory for Non-linear Spectroscopy. During this internship the influence of the morphology on the polyaniline (PANI) behavior under high pressure, up to 15 GPa, was studied. This project aims to systematically study the behavior of aniline under high pressure and the interaction effect of PANI nanofibers with gold nanoparticles under high pressure, up to 20 - 25 GPa. The aniline stability will be studied in liquid and solid phases (phase I and II) as a function of pressure in absence and presence of electronic excitation with laser in the visible range. This behavior will be monitored by Raman and infrared spectroscopies. Under these conditions of pressure and radiation the polymerization of aniline is expected resulting in the formation of aniline oligomers, formed through several polymerizations mechanisms of aniline, and/or polyaniline, if the head-to-tail coupling is favored. The obtained material will be characterized morphologically (scanning electron microscopy (SEM)) and spectroscopically (UV-VIS-NIR, FTIR and Raman). The behavior of the hybrid material of PANI fibers and gold nanoparticles under high pressure will be also studied. The response of the material will be followed by Raman and FTIR techniques. It is expected that the presence of the gold nanoparticles changes the behavior of the PANI nanofibers, whether in quantity or nature of the cross-linking segments formed in a high pressure condition, when compared to pure PANI. It is intended to complement the study of the stability of aniline and the behavior of composites at high pressure during a research internship abroad (BEPE) that will be submitted on due date. The development of this project will have the collaboration of Prof. Roberto Bini, University of Florence.
News published in Agência FAPESP Newsletter about the scholarship: