Ultra-water-repellent surface: Fabrication of complicated structure of SiO2 nanoparticles by electrostatic self-assembled films

Takuji Soeno, Kohei Inokuchi, Seimei Shiratori

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Ultra-water-repellent surface requires a high surface roughness and low surface energy. We designed surface complicated microstructure of SiO 2 nanoparticles by using electrostatic self-assembly process. The films that were prepared by the alternate adsorption of poly(allylamine hydrochloride), SiO2 nanoparticles mixture solution and poly(acrylic acid) on the substrates were very complicated in surface structure. After surface hydrophobic treatment by dichlorodimethylsilane, the film surface showed a contact angle of larger than 160° for water droplets. The value was much larger compared with the contact angle on silicon wafer treated by dichlorodimethylsilane. The difference was strongly dependent on the surface structure. In this paper, we changed deposition conditions to fabricate the water-repellent surfaces with various surface structures by using three types of silica nanoparticles, and we found that the nanoscale structure was very important for the ultra-water-repellency.

Original languageEnglish
Pages (from-to)543-547
Number of pages5
JournalApplied Surface Science
Volume237
Issue number1-4
DOIs
Publication statusPublished - 2004 Oct 15

Fingerprint

surface water
Electrostatics
electrostatics
Nanoparticles
Fabrication
nanoparticles
fabrication
Water
Surface structure
carbopol 940
Contact angle
hydrochlorides
acrylic acid
surface treatment
Silicon wafers
Interfacial energy
Silicon Dioxide
Self assembly
water
Acrylics

Keywords

  • Atomic force microscopy
  • Electrostatic self-assembly process
  • Surface structure
  • Ultra-water-repellent surface

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Ultra-water-repellent surface : Fabrication of complicated structure of SiO2 nanoparticles by electrostatic self-assembled films. / Soeno, Takuji; Inokuchi, Kohei; Shiratori, Seimei.

In: Applied Surface Science, Vol. 237, No. 1-4, 15.10.2004, p. 543-547.

Research output: Contribution to journalArticle

Soeno, Takuji ; Inokuchi, Kohei ; Shiratori, Seimei. / Ultra-water-repellent surface : Fabrication of complicated structure of SiO2 nanoparticles by electrostatic self-assembled films. In: Applied Surface Science. 2004 ; Vol. 237, No. 1-4. pp. 543-547.
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