Deposition of thin films of TiO2 from Langmuir–Blodgett film precursors

Abstract

Excellent quality thin TiO2 films have been obtained by the thermal decomposition of n-octadecyl amine-titanyl oxalate complex multilayer Langmuir–Blodgett films. The films were characterized by x-ray diffraction and x-ray photoemission studies. X-ray diffraction studies suggest a preferred orientation of the TiO2 films.

A Novel Method for Preparing Ordered SnO2/TiO2 Alternate Nanoparticulate Films

“…The half band width was very small, which illustrated that the tin-containing compound was SnO 2 (22,24). In the region of 450-470 eV, the characteristic peaks of the 2 p transition of titanium at 458.6 and 464.3 eV confirmed that the Ti-containing compound was TiO 2 (2,24). In the O1s spectrum, the characteristic peak at 530.2 eV, which can be attributed to the lattice oxygen in SnO 2 and TiO 2 , was obtained (22).…”

“…1), all the nanoparticles were spheres and the mean size of the SnO 2 nanoparticles and TiO 2 nanoparticles in the organosol were 1.0 and 1.5 nm in diameter, respectively. The densities of the bulk phases were 6.95 g/cm 3 for SnO 2 and 3.80 g/cm 3 for TiO 2 . So the concentrations of nanoparticles in the spreading solutions could be calculated.…”

“…If the appropriate method is chosen, very smooth and homogeneous metal oxide films can be produced. It has been shown already that ultrathin films of Ti oxide (2), Zn oxide (3), ferrous (6) and ferric (4,7,8) 1 To whom correspondence should be addressed.…”

“…The technique has some advantages, including excellent control of film thickness and uniformity in the fabrication of highly ordered monolayer, multilayer, and alternate layer structures. A novel approach using LB films as precursors to fabricate metal oxide thin films was developed (2)(3)(4)(5). The metal fatty acid salt films were constructed by LB techniques and then the organic components were removed to form metal oxide films by directly heating the LB films or exposing the LB films to ultraviolet light and reactive oxygen.…”

Preparation of TiO2 Thin Films Using Octadecylamine Langmuir-Blodgett Films and Evaluation of Their Photocatalytic Activity

“…The TiO 2 particles in the colloidal dispersion at near-neutral pH were negatively charged, therefore cationic fi lm materials, particularly octadecylamine ODA , were used in these experiments. It has been shown that the use of long-chain amine monolayers and an aqueous subphase containing titanium potassium oxalate K 2 TiO C 2 O 4 2 ; TPO results in formation of a complex at the air-water interface 10 ; TiO 2 films are then obtained by LB deposition and post-heat-treatment 11 .…”