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  Nature's design for superhydrophobicity in tropical leaves

Sridar, S., Raman, S., & Kumar, R. (2015). Nature's design for superhydrophobicity in tropical leaves. Surface Innovations, 3(3), 144-150. doi:10.1680/jsuin.14.00010.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54D2-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54D3-9
Genre: Journal Article

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 Creators:
Sridar, Soumya1, Author              
Raman, Sangeetha2, Author              
Kumar, Ravi1, Author              
Affiliations:
1Materials Processing Section, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras (IIT-Madras), Chennai, India, ou_persistent22              
2Interaction Forces and Functional Materials, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863357              

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Free keywords: Morphological study; Radius of curvature; Self-cleaning effects; Self-cleaning surfaces; Superhydrophobicity; Surface characterization; Technological applications; Wettability measurements
 Abstract: Water repellency, exemplified in nature, has fascinated the materials community. This behaviour is utilised to biomimic self-cleaning effects for technological applications. Tropical leaves of three species, namely Moringa oleifera, Euphorbia milii and Caesalpinia ferrea, are investigated in this study. Wettability measurements show that C. ferrea leaf was superhydrophobic with a contact angle greater than 150 degrees, while the other two leaves were hydrophobic with contact angles greater than 140 degrees but less than 150 degrees. Surface morphological studies reveal a structure with irregular wax structures on all the three leaves, unlike the regular wax structures such as tubules or platelets typically observed in most of the superhydrophobic leaves. The surface features were quantified on C. ferrea leaf surface due to its reduced wettability among the three leaves. The parameters such as height, mid-width, and radius of curvature of the cell and thickness of the wax film were determined. This study will possibly provide a new insight into developing self-cleaning surfaces with irregular nanostructures as opposed to conventional regular nanostructure patterns.

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Language(s): eng - English
 Dates: 2015-09-01
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000366979900002
DOI: 10.1680/jsuin.14.00010
 Degree: -

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Title: Surface Innovations
  Abbreviation : SURFI
Source Genre: Journal
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Publ. Info: London, GB : ICE Publishing
Pages: - Volume / Issue: 3 (3) Sequence Number: - Start / End Page: 144 - 150 Identifier: ISSN: 20506252
CoNE: https://pure.mpg.de/cone/journals/resource/20506252