Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Evaporation of a Water Droplet Deposited on a Nano-Patterned Transparent Film Fabricated by UV Nanoimprint

Get access (open in a dialog) DOI: 10.1615/IHTC15.tel.008966
pages 7989-7997

Abstrakt

A moth-eye structure, which consisted of nano-scale conical patterns, has been of increasing interest because the light reflected by such a structure is considerably minimized. The authors have developed a fabrication method of a moth-eye structure onto grassy carbon (GC) substrate using an oxygen-ion-beam system and succeeded in the duplication of the moth-eye structure on an ultra-violet (UV) curable resin via UV nanoimprint. Although the GC substrate was an opaque material, this duplicated pattern was transparent. In this study, we investigated the evaporation characteristic of a water droplet on a nano-patterned substrate. As a result, it became clear that the water droplet penetrates into the nano-patterned substrate along the contact line and the speed of evaporation is accelerated, compared to the case of substrates without nano-pattern. This phenomenon not only occurred on the GC substrate but also occurred on the duplicated transparent substrate. The authors believe that the nano-patterned transparent film is a suitable candidate for designing the surface of a multifunctional film for the protection of solar cells or outdoor display screens, because it can accelerates the evaporation of raindrops and allow the light to readily pass through.