Optimization of the feedback constant control for the mass-controlled layer-by-layer sequential adsorption technique for polyelectrolyte thin films

Yoshiki Okayama, Takahiro Ito, Seimei Shiratori

Research output: Contribution to journalArticle

13 Citations (Scopus)


Mass-controlled layer-by-layer sequential adsorption process was newly developed for the fabrication of ultra-thin organic films formed by polyelectrolytes. A quartz crystal was attached to the arm of a robot and, using the quartz crystal microbalance (QCM) method, the frequency shifts during adsorption of the materials were monitored. By optimization of the feedback constant of the data acquired by QCM to the dipping time, high-quality self-assembled films were produced. From the cross-sectional images observed by TEM and thickness measurement carried out using an ellipsometer, it was found that the layer thickness was controlled with nm-scale accuracy.

Original languageEnglish
Pages (from-to)132-137
Number of pages6
JournalThin Solid Films
Issue number1-2
Publication statusPublished - 2001 Aug 1



  • Adsorption
  • Ellipsometry
  • Heterostructures
  • Mass control
  • Quartz
  • Self-assembly

ASJC Scopus subject areas

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

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