Preparation of nanoporous titania films by surface sol-gel process accompanied by low-temperature oxygen plasma treatment

Jianguo Huang, Izumi Ichinose, Toyoki Kunitake, Aiko Nakao

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Nanoporous ultrathin films of titania were prepared. First, a titania/poly(acrylic acid) (PAA) nanocomposite film was prepared via the surface sol-gel process, with the thickness of the titania gel layer to be 0.44 ± 0.10 nm/cycle. The organic species in the film were then removed by low-temperature oxygen plasma treatment, as monitored by quartz crystal microbalance frequency measurement and Fourier transform infrared and X-ray photoelectron spectroscopies. The plasma treatment was effective at least up to the depth of 10-12 nm. The resulting ultrathin titania film showed a UV-visible absorption with the edge at about 330 nm, which is considerably blue-shifted from that of bulk titania. The film surface was flat and uniform over a large area, and its density was as low as 0.54 g/cm3. Transmission electron microscopy revealed the presence of pores with diameters of ca. 2 nm. The pore existence was confirmed by the formation of silver nanoparticles inside the film by photoreduction of silver ions.

Original languageEnglish
Pages (from-to)9048-9053
Number of pages6
JournalLangmuir
Volume18
Issue number23
DOIs
Publication statusPublished - Nov 12 2002
Externally publishedYes

Fingerprint

oxygen plasma
cold plasmas
sol-gel processes
Sol-gel process
titanium
Titanium
Oxygen
Plasmas
preparation
carbopol 940
Silver
Temperature
silver
Nanocomposite films
Ultrathin films
Quartz crystal microbalances
porosity
frequency measurement
Acrylics
acrylic acid

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Preparation of nanoporous titania films by surface sol-gel process accompanied by low-temperature oxygen plasma treatment. / Huang, Jianguo; Ichinose, Izumi; Kunitake, Toyoki; Nakao, Aiko.

In: Langmuir, Vol. 18, No. 23, 12.11.2002, p. 9048-9053.

Research output: Contribution to journalArticle

Huang, Jianguo ; Ichinose, Izumi ; Kunitake, Toyoki ; Nakao, Aiko. / Preparation of nanoporous titania films by surface sol-gel process accompanied by low-temperature oxygen plasma treatment. In: Langmuir. 2002 ; Vol. 18, No. 23. pp. 9048-9053.
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