title: Self-assembled biomimetic superhydrophobic CaCO3 coating inspired from fouling mineralization in geothermal water.
abstract: Inspired from fouling self-mineralization in geothermal water, a novel biomimetic cactuslike CaCO(3) coating with superhydrophobic features is reported in this letter. The structure, morphologies, and phases of the CaCO(3) coating were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, and infrared spectrophotometry. After prenucleation treatment, a continuous cactuslike CaCO(3) coating with hierarchical nano- and microstructures was self-assembled on stainless steel surfaces after immersion in simulated geothermal water at 50 °C for 48 h. After being modified with a low-surface-energy monolayer of sodium stearate, the as-prepared coating exhibited superhydrophobic properties with a water contact angle of 158.9° and a sliding angle of 2°. Therefore, this work might open up a new application field of geothermal resources and provide insight into designing multidimensional structures with functional applications, including superhydrophobic surfaces.
authors.affiliation: Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China.
authors.forename: Gong G
authors.initials: GG
authors.lastname: Wang
authors.forename: Li Q
authors.initials: LQ
authors.lastname: Zhu
authors.forename: Hui C
authors.initials: HC
authors.lastname: Liu
authors.forename: Wei P
authors.initials: WP
authors.lastname: Li
mesh_terms: D032701:Biomimetics; D002119:Calcium Carbonate / Q000737:chemistry*; D045482:Hot Springs; D057927:Hydrophobic and Hydrophilic Interactions; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D002119:Calcium Carbonate