Characterization and corrosion studies of titania-co

Nickel titanium (NiTi) was dip-coated with titania via the solgel route using titanium butoxide (Ti(OC4H9)4) as precursor. The as-coated titania film was crystallized to form anatase by treatment in steam at 1058C. The crystallized film was relatively thick (about 750 nm) and even. Atomic force microscopy (AFM) revealed that the film was dense with a surface roughness of about 3 nm, and was composed of particles of about 100 nm. X-ray diffractometry (XRD) showed that these particles were composed of nanocrystallites of a few nanometers.