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Non-Wetting Superhydrophobic Surface Enabled by One-Step Spray Coating Using Molecular Self-Assembled Nanoparticles

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Inspired by nature, creating an artificial superhydrophobic surface would have broad implication in many industries. Although various fabrication approaches have been developed, low-cost pathways for integration into large-area superhydrophobic coating remain a considerable challenge. Herein, we developed a fast, facile, and scalable approach for the fabrication of superhydrophobic surfaces via one-step spray coating process. The nanoparticle solution for the film coating was prepared by functionalizing the hydrophilic surface of Al2O3 nanoparticles by self-assembly of phosphonic acid based hydrocarbon molecule. After well dispersion in solution, the functionalized Al2O3 nanoparticles were simply spray-coated for fabricating the superhydrophobic hierarchical structures without post-hydrophobization. The surface morphologies and wetting properties of the developed coating were characterized to optimize the superhydrophobicity. Consequently, our optimized one-step coating method allows excellent non-wetting superhydrophobic surface with morphology controlled and densely packed hierarchical structures, exhibiting a high water contact angle (>160°) with a low sliding angle (<2°). Furthermore, this method was applied to diverse substrates including silicon, glass, fabric, and even flexible plastic substrates.
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Keywords: Nanoparticle; Non-Wetting; Self-Assembled Monolayer; Spray Coating; Superhydrophobic

Document Type: Research Article

Affiliations: Department of Chemistry, Kyonggi University, Suwon, Gyeonggi-Do 443-760, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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