Fabrication of mono- and multi-layers of submicron-sized spheres by a dip-coating technique and their transmittance property

Yoshio Kobayashi, Hiroyuki Miyauchi, Shunchao Gu, Daisuke Nagao, Mikio Konno

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This paper describes fabrication of well-ordered mono- and multi-layers of submicron-sized silica or polystyrene (PSt) spheres. The mono-layers of spheres were fabricated on glass plates by a dip-coating technique at various concentrations of KCl, HCl and KOH in colloidal suspension. The mono-layer of spheres in a close-packed hexagonal structure showed an extinction peak in the visible wavelength attributed to a secondary Bragg diffraction. Full width at half maximum (FWHM) of the extinction peak was the lowest at low ionic strength and at neutral pH. Different types of multi-layers of spheres were fabricated by repeating the dip-coating processes. Silica spheres with a size of 589 nm could be mono-layered in the close-packed hexagonal structure on the mono-layer of the 404-nm-PSt spheres. PSt spheres with a size of 404 nm could be layered on the mono-layer of 500-nm-PSt spheres in such a way that the 404-nm-PSt spheres occupied void spaces among three 500-nm-PSt spheres. Silica spheres with a size of 233 nm could be assembled in a two-dimensional network structure on mono-layered 589-nm-silica spheres.

Original languageEnglish
Pages (from-to)614-621
Number of pages8
JournalJOURNAL of CHEMICAL ENGINEERING of JAPAN
Volume37
Issue number5
DOIs
Publication statusPublished - 2004 May 1

Keywords

  • Colloid
  • Dip-coating
  • Mono-layer
  • Photonic crystal
  • Sphere

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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