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Issue 38, 2011
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Template free preparation of nanoporous organically modified silica thin films on flexible substrates

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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.

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

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Publication details

The article was received on 23 May 2011, accepted on 21 Jul 2011 and first published on 18 Aug 2011


Article type: Paper
DOI: 10.1039/C1JM12188J
Citation: J. Mater. Chem., 2011,21, 14830-14837
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    Template free preparation of nanoporous organically modified silica thin films on flexible substrates

    A. Yildirim, H. Budunoglu, M. Yaman, M. O. Guler and M. Bayindir, J. Mater. Chem., 2011, 21, 14830
    DOI: 10.1039/C1JM12188J

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