Alternate multilayer deposition from ammonium amphiphiles and titanium dioxide crystalline nanosheets using the Langmuir-Blodgett technique

Yamaki, Tetsuya; Asai, Keisuke*

A new type of TiO nanosheet-organic complex multilayer film was successfully prepared by the Langmuir-Blodgett technique. Surface pressure-area curves demonstrated that a stable monolayer of dioctadecyldimethylammonium bromide (DODAB) was formed on an aqueous suspension of TiO nanosheets derived from an exfoliated layered titanate, HTi□O・HO (x0.7; □, vacancy). The hybrid monolayer of the ammonium amphiphiles and the TiO nanosheet was quantitatively transferred onto a hydrophobic quartz plate to form a multilayer film. X-ray diffraction measurements confirmed the formation of an ordered structure of DODAB/TiO with an interlayer distance of 3.4 nm.