FT-IR study of nanosurface phenomena

I. Markova – Deneva
University of Chemical Technology and Metallurgy –Sofia, 8 St. Kl. Ohridski blvd., 1756 Sofia, e-mail:vania@uctm.edu

Abstract

IR study of metal nanoparticles in amorphous or crystalline state obtained via water solution of metal salts by borohydride reduction with NaBH4, as well as of nanowires prepared using mesopore ceramic supports has been carried out. FT-IR spectra in mid-infrared region of visible spectrum (4000-400 cm-1) of these nanoscaled materials have been undertaken. IR spectroscopy possibilities have allowed to investigate the nanosurface phenomena and to prove the creation of different chemical bonds such as B-O, B-H, Si-O, O-H in surface atom groups. FT-IR spectra have provided information about the technological and hydrodynamic conditions such as a kind of the initial salt, a type of the reactor used (T, Y, A methods), different ceramic supports used (SiO2, SiMCM and ALMCM), different variants of the support introducing surface wetting), as well as about the nanosclaled materials composition, their structure state and nucleation.