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An effective method to significantly enhance the robustness and adhesion-to-substrate of high transmittance superamphiphobic silica thin films
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Update time: 2014-10-15
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Mechanically robust, high transmittance and superamphiphobic multi-functional coatings were fabricated for the first time. Three different nanoparticles were used to sequentially assemble the thin films. The simple chemical vapour deposition (CVD) of tetraethyl orthosilicate was applied to improve the robustness and adhesion-to-substrate of the coating. The contact angle of coating reached 171° for water and 152° for ethylene glycol. The maximum transmittance measured using an integrating-sphere photometer was 98.7% at 1580 nm. The coatings withstood the 4H pencil scratching test, tape peeling test, sand abrasion test and water-drop impact test. The effects of CVD conditions on the robustness and adhesion-to-substrate of the coatings were also investigated. The multi-functional coatings could overcome the large barriers commonly encountered in practical applications due to their good robustness, high transmittance and superior superamphiphobicity. 
Journal of Materials Chemistry A, 2014
Surface morphologies of the coatings treated with TEOS CVD for 0 h (a), 1 h (b), 2 h (c) and 3 h (d).

Digital images of water (WCA) and ethylene glycol (OCA) contact angles of the coatings treated by TEOS CVD for 0 h (a and b), 1 h (c and d), 2 h (e and f) and 3 h (g and h).

SEM images of the coatings treated by TEOS CVD for 0 h (a and b), 1 h (c and d), 2 h (e and f) and 3 h (g and h) after 2H pencil scratching testing.
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