| Tip geometry controls adhesive states of superhydrophobic surfaces. | |
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MedLine Citation:
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PMID: 20143859 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Inspired by biological attachment systems, aligned polystyrene (PS) nanopillars terminating in flat, concave tips and nanotubes were fabricated by a simple and reproducible method. All the obtained surfaces show both the contact angles larger than 150 degrees (superhydrophobicity) and high adhesion of water to it. The tip geometry plays an important role in determining the adhesive property. Surface with the concave tips has the highest adhesion, and then the surface with flat tips, whereas aligned nanotube surface has a relatively lower adhesion. Besides different van der Waals forces between the PS surfaces and water, another important factor, i.e., different negative pressures produced by the different volumes of sealed air, may be the crucial factor for their different adhesions. These findings provide the experimental evidence of the influence of the tip geometry on the adhesion of structured superhydrophobic surfaces, which is helpful for us to further understand the biological attachment systems and to optimum design of artificial analogues. |
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Authors:
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Zhongjun Cheng; Jun Gao; Lei Jiang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Langmuir : the ACS journal of surfaces and colloids Volume: 26 ISSN: 1520-5827 ISO Abbreviation: Langmuir Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-05-25 Completed Date: 2010-09-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882736 Medline TA: Langmuir Country: United States |
Other Details:
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Languages: eng Pagination: 8233-8 Citation Subset: IM |
Affiliation:
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Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, 100190 Beijing, China. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Microscopy, Atomic Force Microscopy, Electron, Scanning Polystyrenes / chemistry* Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Polystyrenes |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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