Preparation of mesoporous TiO2 thin films by surfactant templating

Miah Muhammed Yusuf, Hiroaki Imai, Hiroshi Hirashima

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Porous TiO2 thin films have potential applications in optical-, electronic- and mechanical-components, catalysts, photoelectrodes, etc. A novel method to control pore sizes of sol-gel thin films by surfactant templating was investigated. The coating sol was obtained by hydrolysis of Ti(C4H9O)4 in ethanol solution. The films were prepared by spin-coating on glass substrates and drying at 90°C (xerogel film) or drying after immersion in a cetyltrimethylammoniumchloride (CTAC) or benzyltrimethylammoniumchloride solution for 1-24 h (CTAC- or BTAC-modified film), followed by calcination at 500°C in air. The calcined films were transparent and 30-120 nm in thickness. The refractive indices of the CTAC- and BTAC-modified films were about 1.7 and 1.9, respectively. These were 10-20% lower than those of the xerogel films. A columnar structure was observed by SEM and AFM. The columns were about 30 nm in diameter. The spacing between the columns was about 10 nm, corresponding to the size of CTAC micelles. These results show that the microstructure and pore size of the sol-gel films can be controlled by the surfactant-templating.

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume285
Issue number1-3
DOIs
Publication statusPublished - 2001 Jun

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Surface-Active Agents
Surface active agents
surfactants
Thin films
preparation
thin films
Xerogels
xerogels
drying
Pore size
Sol-gels
Drying
gels
porosity
Spin coating
Micelles
Polymethyl Methacrylate
Sols
Calcination
roasting

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Preparation of mesoporous TiO2 thin films by surfactant templating. / Yusuf, Miah Muhammed; Imai, Hiroaki; Hirashima, Hiroshi.

In: Journal of Non-Crystalline Solids, Vol. 285, No. 1-3, 06.2001, p. 90-95.

Research output: Contribution to journalArticle

Yusuf, Miah Muhammed ; Imai, Hiroaki ; Hirashima, Hiroshi. / Preparation of mesoporous TiO2 thin films by surfactant templating. In: Journal of Non-Crystalline Solids. 2001 ; Vol. 285, No. 1-3. pp. 90-95.
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