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Superhydrophobic transparent films from silica powder: Comparison of fabrication methods

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Title Superhydrophobic transparent films from silica powder: Comparison of fabrication methods
 
Creator LIU, LD
LIN, CS
TIKEKAR, M
CHEN, PH
 
Subject TITANIUM-DIOXIDE FILMS
THIN-FILMS
ASSEMBLED MONOLAYERS
SURFACES
GLASS
PARTICLES
NANOPARTICLES
ARRANGEMENT
NANOFIBERS
SPHERES
Self-cleaning surfaces
Superhydrophobicity
Transmissivity
Sol-gel deposition
Silica
Polydimethylsiloxane
 
Description The lotus leaf is known for its self-clean, superhydrophobic surface, which displays a hierarchical structure covered with a thin wax-like material. In this study, three fabrication techniques, using silicon dioxide particles to create surface roughness followed by a surface modification with a film of polydimethylsiloxane, were applied on a transparent glass substrate. The fabrication techniques differed mainly on the deposition of silicon dioxide particles, which included organic, inorganic, and physical methods. Each technique was used to coat three samples of varying particle load. The surface of each sample was evaluated with contact angle goniometer and optical spectrometer. Results confirmed the inverse relationships between contact angle and optical transmissivity independent of fabrication techniques. Microstructural morphologies also suggested the advantage of physical deposition over chemical methods. In summary, the direct sintering method proved outstanding for its contact angle vs transmissivity efficiency, and capable of generating a contact angle as high as 174 degrees. (C) 2011 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE SA
 
Date 2012-06-26T08:43:11Z
2012-06-26T08:43:11Z
2011
 
Type Article
 
Identifier THIN SOLID FILMS,519(19)6224-6229
0040-6090
http://dx.doi.org/10.1016/j.tsf.2011.03.129
http://dspace.library.iitb.ac.in/jspui/handle/100/14211
 
Language English