Complete wetting characteristics of micro/nano dual-scale surface by plasma etching to give nanohoneycomb structure
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- Title
- Complete wetting characteristics of micro/nano dual-scale surface by plasma etching to give nanohoneycomb structure
- Authors
- Kim, D; Lee, S; Hwang, W
- Date Issued
- 2012-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- A variety of flat superhydrophilic surfaces have been fabricated for biological and industrial applications. We report here the preparation of a simple and inexpensive non-polar curved superhydrophilic surface. This surface has dual-scale surface roughness, on both micro-and nanoscales. Curved surfaces with a near-zero water contact angle and 'complete wetting' are demonstrated. By using a conventional plasma etching process, which creates microscale irregularity on an aluminum surface, followed by an anodization process which further modifies the plasma etched surface by creating nanoscale structures, we generate a surface having irregularities on two-scales. This surface displays a semi-permanent superhydrophilic property (if the surface has no damage by the exterior failure), having a near-zero contact angle with water drops. We further report a simple and inexpensive curved (i.e., non-planar) superhydrophilic structure with a near-zero contact angle. The dual-scale character of the surface increases the capillary force effect and reduces the energy barriers of the nanostructures. Crown Copyright (C) 2011 Published by Elsevier B. V. All rights reserved.
- Keywords
- Nanohoneycomb; Plasma etch; Superhydrophilic surface; Dual-scale; Anodization; ELECTRIC-FIELD; NANOSTRUCTURES; LITHOGRAPHY; FABRICATION; MECHANISMS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14092
- DOI
- 10.1016/J.CAP.2011.06.003
- ISSN
- 1567-1739
- Article Type
- Article
- Citation
- CURRENT APPLIED PHYSICS, vol. 12, no. 1, page. 219 - 224, 2012-01
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