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      Highly transparent, flexible, and thermally stable superhydrophobic ORMOSIL aerogel thin films

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      Author
      Budunoglu, H.
      Yildirim, A.
      Güler, Mustafa O.
      Bayındır, Mehmet
      Date
      2011
      Source Title
      ACS Applied Materials and Interfaces
      Print ISSN
      1944-824
      Publisher
      American Chemical Society
      Volume
      3
      Issue
      2
      Pages
      539 - 545
      Language
      English
      Type
      Article
      Item Usage Stats
      127
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      Abstract
      We report preparation of highly transparent, flexible, and thermally stable superhydrophobic organically modified silica (ORMOSIL) aerogel thin films from colloidal dispersions at ambient conditions. The prepared dispersions are suitable for large area processing with ease of coating and being directly applicable without requiring any pre- or posttreatment on a variety of surfaces including glass, wood, and plastics. ORMOSIL films exhibit and retain superhydrophobic behavior up to 500 °C and even on bent flexible substrates. The surface of the films can be converted from superhydrophobic (contact angle of 179.9°) to superhydrophilic (contact angle of <5°) by calcination at high temperatures. The wettability of the coatings can be changed by tuning the calcination temperature and duration. The prepared films also exhibit low refractive index and high porosity making them suitable as multifunctional coatings for many application fields including solar cells, flexible electronics, and lab on papers. © 2011 American Chemical Society.
      Keywords
      Aerogel
      Ambient pressure drying
      Flexible substrate
      Low refractive indices
      Optical transparency
      ORMOSIL thin film
      Porous materials
      Superhydrophobic surface
      Permalink
      http://hdl.handle.net/11693/22019
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/am101116b
      Collections
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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