Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 370, Issue 1-3, Pages 15-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2010.08.014
Keywords
Superhydrophobicity; Anodic aluminum oxide (AAO); Inter-pore distance; Hard anodization; Nanostructure
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Funding
- Korea government(MEST) [2010-0014693]
- Korea Science and Engineering Foundation [M10711160001-08M1116-00110]
- Ministry of Health, Welfare & Family Affair, Republic of Korea [A084204]
- Korea Health Promotion Institute [A084204] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2010-0014693, 2008-2000101] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Durable and pitch-controlled nanostructures to have well-defined superhydrophobic functions were fabricated by post-etching of MO with a self-assembled heptadecafluoro-1,1,2,2-tetrahydrodecyl-trichlorosilane monolayer coating. The inter-pore distance at the surface of anodic aluminum oxide (AAO) was found to be an important factor for controlling the superhydrophobic adhesiveness. The hysteresis of the contact angles and the adhesiveness to a water droplet were minimized in two-steps during post-etching in phosphoric MO (PAAO). A more durable nanostructure was obtained with the superhydrophobic surface of PAAO than those of oxalic AAO and of sulfuric AAO because of the inherent hardness of PAAO and its long inter-pore distance (500 nm). (C) 2010 Elsevier B.V. All rights reserved.
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