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

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 w...

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Bibliographic Details
Published in:Langmuir 2020-09, Vol.36 (35), p.10371-10378
Main Authors: Yamamoto, Shunsuke, Ono, Asami, Matsui, Jun, Hoshino, Norihisa, Akutagawa, Tomoyuki, Miyashita, Tokuji, Mitsuishi, Masaya
Format: Article
Language:English
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Summary: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.
ISSN:0743-7463
1520-5827
DOI:10.1021/acs.langmuir.0c01446