Titania Nanofilms from Titanium Complex-Containing Polymer Langmuir-Blodgett Films

Shunsuke Yamamoto, Asami Ono, Jun Matsui, Norihisa Hoshino, Tomoyuki Akutagawa, Tokuji Miyashita, Masaya Mitsuishi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This paper proposes a method of fabricating low-dimensional TiO2 nanofilms at room temperature under ambient pressure conditions. The titanium-containing polymer complex Ti-p(DDA/acac) was synthesized by reacting an amphiphilic copolymer (p(DDA/acac)) with a titanium complex. Its ultrathin films were prepared using the Langmuir-Blodgett (LB) technique. The monolayer was found to be free from hydrolysis and cross-linking side reactions, even at the air-water interface. The transferred LB films (nanosheets) were oxidized by ultraviolet irradiation at room temperature. The photo-oxidized material has an amorphous and porous structure with subnanometer-scale controllability (0.18 nm per layer). Photocatalytic performance was demonstrated by converting multilayered LB films of Ti-(DDA/acac) and the silicon-containing polymer p(DDA/SQ) into ultrathin hetero-multilayers of TiO2 and SiO2 under UV-O3 treatment. The scalability affords a uniform photopattern formation of photo-oxidized TiO2 films over several hundreds of micrometers.

Original languageEnglish
Pages (from-to)10371-10378
Number of pages8
Issue number35
Publication statusPublished - 2020 Sept 8


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