Stable and Transparent Superhydrophobic Nanoparticle Films


Ling, Xing Yi and Phang, In Yee and Vancso, G. Julius and Huskens, Jurriaan and Reinhoudt, David N. (2009) Stable and Transparent Superhydrophobic Nanoparticle Films. Langmuir, 25 (5). pp. 3260-3263. ISSN 0743-7463

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Abstract:A superhydrophobic surface with a static water contact angle (θw) > 150° was created by a simple “dip-coating” method of 60-nm SiO2 nanoparticles onto an amine-terminated (NH2) self-assembled monolayer (SAM) glass/silicon oxide substrate, followed by chemical vapor deposition of a fluorinated adsorbate. For comparison, a close-packed nanoparticle film, formed by convective assembly, gave θw ~120°. The stability of the superhydrophobic coating was enhanced by sintering of the nanoparticles in an O2 environment at high temperature (1100 °C). A sliding angle of <5° indicated the self-cleaning properties of the surface. The dip-coating method can be applied to glass substrates to prepare surfaces that are superhydrophobic and transparent.
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Copyright:© 2009 American Chemical Society
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