Template free preparation of nanoporous organically modified silica thin films on flexible substrates

Adem Yildirim, Hulya Budunoglu, Mecit Yaman, Mustafa O. Guler, Mehmet Bayindir

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

We report the preparation and characterization of nanoporous organically modified silica (ormosil) thin films at room temperature and neutral pH conditions from homogeneous methyl silsesquioxane (MSQ) gels. Universally applicable and stable colloidal ormosil suspensions are prepared from the gels by sonication and coated to the substrates including glass, paper and plastics. The nanoporosity and thickness of the films can be tuned, which makes them suitable for certain applications including sensing, functional coatings, and low-dielectric materials. We demonstrate the antireflection property of the films on glass, cellulose acetate (CA) and polyetherimide (PEI) substrates. The films on CA and PEI retain their antireflection property after multiple bending cycles. Furthermore, films are intrinsically hydrophobic, over a wide pH range, with static contact angles up to 143° on paper and 123° on glass and CA. Producing nanoporous ormosil thin films on flexible substrates may expand their use in low cost electronic, optical devices and sensors, and lab-on-paper applications.

Original languageEnglish (US)
Pages (from-to)14830-14837
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number38
DOIs
StatePublished - Oct 14 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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