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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

WATER-EVAPORATION CHARACTERISTICS OF A NANOPATTERNED TRANSPARENT FILM FABRICATED BY UV NANOIMPRINT

DOI: 10.1615/TFESC1.mnp.012825
pages 1541-1551

Noriyuki Unno
Tokyo University of Science, Yamaguchi

Motoharu Asano
Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, Japan

Yuki Matsuda
Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, Japan

Shin-ichi Satake
Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, Japan

Jun Taniguchi
Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, Japan


KEY WORDS: Evaporation, Nanoimprint, UV curable resin, Transparent

Abstract

We investigated an evaporation behavior of a water droplet on the nano-patterned transparent film fabricated by UV nanoimprint. In order to fabricate the nano-patterned substrate with a photo-polymer material, we employed ultra violet (UV) curable resin. In this case, a moth-eye anti-reflection structure on a glassy carbon substrate was used as a master mold. Furthermore, a nano-pattern obtained by a UV curable resin via nanoimprint was also used as a replica mold and we succeeded in fabrication of the second generation nano-patterned film. Using both obtained transparent films with the nano-pattern, we investigated the evaporation characteristics. As a result, the speed of evaporation on the nano-patterned films is accelerated, compared to substrates without the nano-pattern. Moreover, the nano-patterned surface has the lower reflectance ratio than the planar surface. The phenomenon shows that the optical characteristics of the replica mold can be maintained. We believe that the obtained transparent film can be a multi-functional film.

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