Evaluation of porosity of polymer-templated TiO2 nano-thin films: Selective adsorption of C60 fullerene and cytochrome c

Naoki Mizutani, Wataru Futaoami, Seung Woo Lee, Toyoki Kunitake

Research output: Contribution to journalArticlepeer-review

Abstract

TiO2/polymer nano-thin films that were assembled with a polymer (polyacrylic acid, PAA or polyvinyl alcohol, PVA) and Ti(O-"Bu)4 by the surface sol-gel process. These films were employed for fabrication of nanoporous TiO2 thin films. The template polymers of PAA and PVA were removed by plasma treatment and polymer-templated nanocavities in the TiO 2 films were prepared. The pore size of the nanocavities was approximately estimated by the adsorption of C60 and Cyt. c, which have a specific molecular size of 1 nm and 3 nm, respectively. The PVA templated-TiO2 film showed an improved adsorption of C60 and Cyt. c after plasma treatment, which increased in proportion to the number of deposition cycles. Consequently, it was evident that the PVA templated-TiO2 film has pores larger than 3 nm, whereas pores smaller than 1 nm were prepared in the PAA templated-TiO2 film.

Original languageEnglish
Pages (from-to)304-311
Number of pages8
JournalKOBUNSHI RONBUNSHU
Volume67
Issue number5
DOIs
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

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