Complete characterization of TiO2 mesoporous thin films by means of XANES, XRR and 2D-SAXS

P.C. ANGELOMÉ; M.C. FUERTES; L. ANDRINI; F.G. REQUEJO; G.J.A.A. SOLER ILLIA

Campinas, Brasil

Conferencia; Sixth International Conference on Synchrotron Radiation in Materials Science - SRMS-6; 2008

Brazilian Synchrotron Laboratory

In this work, we have studied TiO2 MTF, prepared using a triblock PEO-PPO based copolymer (Pluronics F127®) as a template, using crossed synchrotron techniques. Films were deposited by dip-coating precursor solutions on different substrates (glass, silicon and ITO), stabilized at 130°C and further treated at 200ºC-500 °C in air. Different initial solutions, with variable concentration of copolymer or metal, and several deposition speeds were used. The nature of pore array and the contraction during the thermal treatment was studied by 2D-SAXS, which gives valuable information on the symmetry and spatial orientation of the pore system. Film thickness, porosity and density were determined by X-Ray Reflectometry. Both measurements were made in the LNLS, Campinas, SP, Brazil (SAXS2 and XRD2 beamlines).