Fabrication and characterization of TiO2 thin film prepared by a layer-by-layer self-assembly method

Jin Ho Kim, Shiro Fujita, Seimei Shiratori

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Titanium dioxide (TiO2) thin films assembled with TiO 2 nanoparticles and oppositely charged polyelectrolytes or titanium (IV) bis(ammonium lactato) dihydroxide (TALH) were successfully fabricated via a layer-by-layer (LBL) self-assembly method at room temperature. Especially, by using the quartz crystal microbalance (QCM) to monitor the in-situ deposition phenomenon of TALH that is saturated and then separated from the film before and after the deposition of 30 s at low pH, the anatase TiO2 multilayer films fabricated with 30 s deposition in TALH adjusted to pH 2.5 showed a higher refractive index (ca. n = 1.75), a denser film growth, and a lower surface roughness (ca. 10.5 nm) than those of the films deposited in different conditions. This film showed a high transmittance in visible range for optical applications and photocatalytic properties by decomposing methyl orange molecules gradually according to UV irradiation time. In addition, as the pH of TALH was decreased from pH 5.5 to 2.0, the thickness of (TiO2 / TALH)30 film was increased from ca. 85 nm to ca. 442 nm.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalThin Solid Films
Volume499
Issue number1-2
DOIs
Publication statusPublished - 2006 Mar 21

Fingerprint

Self assembly
self assembly
Fabrication
Thin films
fabrication
thin films
Titanium dioxide
Quartz crystal microbalances
Multilayer films
Film growth
Titanium
Polyelectrolytes
Ammonium Compounds
Refractive index
Surface roughness
Irradiation
Nanoparticles
quartz crystals
titanium oxides
anatase

Keywords

  • Layer-by-layer self-assembly method
  • Polyelectrolyte
  • Quartz crystal microbalance
  • TiO thin film

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Fabrication and characterization of TiO2 thin film prepared by a layer-by-layer self-assembly method. / Kim, Jin Ho; Fujita, Shiro; Shiratori, Seimei.

In: Thin Solid Films, Vol. 499, No. 1-2, 21.03.2006, p. 83-89.

Research output: Contribution to journalArticle

Kim, Jin Ho ; Fujita, Shiro ; Shiratori, Seimei. / Fabrication and characterization of TiO2 thin film prepared by a layer-by-layer self-assembly method. In: Thin Solid Films. 2006 ; Vol. 499, No. 1-2. pp. 83-89.
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