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Fabrication of functional nanoparticles by layer-by-layer self-assembly method

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2009, 19(6), pp.305-310
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Jinho Kim 1 Jonghee Hwang 1 Tae-Young Lim 1 Sae Hoon Kim 2

1한국세라믹기술원
2강릉원주대학교

Accredited

ABSTRACT

TiO2 thin films consisting of positively charged poly (diallyldimethylammonium chloride) (PDDA) and negatively charged titanium (IV) bis (ammonium lactato) dihydroxide (TALH) were successfully fabricated on a poly (methyl methacrylate) (PMMA) by layer-by-layer (LBL) self-assembly method. By the measurement of quartz crystal microbalance (QCM), it was found that as the solution pH of TALH decreased, the deposition volume of TALH increased and the thickness of (PDDA/TALH) thin film coated on the surface of PMMA particles increased. The PMMA particles coated with the coating sequence of (PDDA/TALH)n showed the variation of color changes as a function of the number of bilayer. The number of bilayer (n) of (PDDA/TALH) thin films was 10 and 20, the values of a* and b* decreased from those of PMMA particles without coating films and the color changes was shifted to green and blue direction in the a*, b* chromaticity diagram. And then, the number of n increased to 30 and 40, the values of a* and b* increased and the color changes was shifted to red and yellow direction, respectively. Finally the PMMA particles coated with (PDDA/TALH)50 thin film showed a little same value of a* and b* with the PMMA particles without (PDDA/TALH) thin film.

Citation status

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