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Crystals 2017, 7(7), 215;

Fabrication of Nano-Micro Hybrid Structures by Replication and Surface Treatment of Nanowires

Department of Mechanical Engineering, Changwon National University, 20, Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do 51140, Korea
Department of Printed Electronics, Korea Institute of Machinery and Materials, Daejeon 34103, Korea
Author to whom correspondence should be addressed.
Academic Editor: Arkady Zhukov
Received: 16 June 2017 / Revised: 7 July 2017 / Accepted: 7 July 2017 / Published: 11 July 2017
(This article belongs to the Special Issue Advance in Crystalline Thin Wires)
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Nanowire structures have attracted attention in various fields, since new characteristics could be acquired in minute regions. Especially, Anodic Aluminum Oxide (AAO) is widely used in the fabrication of nanostructures, which has many nanosized pores and well-organized nano pattern. Using AAO as a template for replication, nanowires with a very high aspect ratio can be fabricated. Herein, we propose a facile method to fabricate a nano-micro hybrid structure using nanowires replicated from AAO, and surface treatment. A polymer resin was coated between Polyethylene terephthalate (PET) and the AAO filter, roller pressed, and UV-cured. After the removal of aluminum by using NaOH solution, the nanowires aggregated to form a micropattern. The resulting structure was subjected to various surface treatments to investigate the surface behavior and wettability. As opposed to reported data, UV-ozone treatment can enhance surface hydrophobicity because the UV energy affects the nanowire surface, thus altering the shape of the aggregated nanowires. The hydrophobicity of the surface could be further improved by octadecyltrichlorosilane (OTS) coating immediately after UV-ozone treatment. We thus demonstrated that the nano-micro hybrid structure could be formed in the middle of nanowire replication, and then, the shape and surface characteristics could be controlled by surface treatment. View Full-Text
Keywords: anodic aluminum oxide; nanowires; UV nano imprint lithography; surface treatment anodic aluminum oxide; nanowires; UV nano imprint lithography; surface treatment

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Jeong, Y.; Shin, S.; Choi, H.; Kim, S.; Kim, J.; Kwon, S.; Kim, K.-Y.; Lee, S.-H.; Jung, Y.-G.; Cho, Y.T. Fabrication of Nano-Micro Hybrid Structures by Replication and Surface Treatment of Nanowires. Crystals 2017, 7, 215.

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