Abstract
In this work, a novel method to fabricate transparent nanomesh-structured hydrophobic (TNH) films was developed to improve the optical properties by minimizing light scattering. First, a nickel nanomesh mold was prepared using phase-shifting edge lithography. Subsequently, the TNH film was fabricated by nanoimprinting an ultraviolet-curable fluorinated polyurethane resist. The resist had a water contact angle of 93.2° when coated on a flat polyethylene terephthalate film with no pattern. Micromesh- and nanomesh-shaped patterns were applied to improve the hydrophobic property of the film. It was noted that the use of a micromesh-patterned film could improve the water contact angle to approximately 130°. Furthermore, the TNH films exhibited a water contact angle of more than 150° while maintaining a light transmittance of more than 90%. The TNH films have great potential for applications such as self-cleaning optical devices and anti-icing windows.
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