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Material preparation

CN Chi-Vinh Ngo
DC Doo-Man Chun
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Superhydrophobic patterns were fabricated using a commercial laser printer (SCX-3205W, Samsung, Korea) with toner-silica mixtures placed into the toner cartridge. Hydrophobic fumed silica nanoparticles (Primary particle size of 7–40 nm, SiO2, Konasil, K-P20, OCI Co. Ltd., Korea) were used for the printing material. The toner powder (CLT-K407S, Samsung, Korea) was used as a binder between the silica and the substrates. The toner size was about 11 μm and the toner composition included styrene acrylic resin (75~85%), wax (5~10%), cyan pigment (1~6%) and silica (1~3%)46. Commercial printing paper (A4, 210 × 297 mm, Double A, Korea) and polymer sheets (Polyester, PP3300, Great, Korea) were used as the substrates.

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