Interface-Directed Web-to-Pillar Transition of Microphase-Separated Siloxane Gels

Kazuyoshi Kanamori, Kazuki Nakanishi, Kazuyuki Hirao, Hiroshi Jinnai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A unique pillar structure of methylsiloxane gel in microfabricated grooves was developed through the competition of phase separation and wetting. In the course of the phase separation in the methylsiloxane sol - gel system, the siloxane phase completely wetted the surface of the grooves while forming material transfer channels, which were arrested as a permanent structure by the sol - gel transition. The phase-separated structure shows an isotropic weblike bicontinuous structure in the grooves wider than the critical value. However, in the narrower grooves, only the pillar structure remained, showing a web-to-pillar transition. The critical value is nearly equal to the characteristic length of the bulk.

Original languageEnglish
Pages (from-to)9101-9103
Number of pages3
JournalLangmuir
Volume19
Issue number22
DOIs
Publication statusPublished - 2003 Oct 28
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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