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Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns

Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns
Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns
The hydrophilicity, hydrophobicity, and sliding behaviour of water droplets on nanoasperities of controlled dimensions were investigated experimentally. We show that the "hemi-wicking"theory for hydrophilic SiO2 samples successfully predicts the experimental advancing angles and that the same patterns, after silanization, become superhydrophobic in agreement with the Cassie-Baxter and Wenzel theories. Our model tophographies have the same dimensional scale of some naturally occurring structures that exhibit similar wetting properties. Our results confirm that a forest of hydrophilic/hydrophobic slender pillars is the most effective superwettable/water-repellent configuration. It is shown that the shape and curvature of the edges of the aspertieis play an important role in determining the advancing angles.
1530-6984
2097-2103
Martines, Elena
59495e65-fc7b-43b4-b172-5c41cea4d626
Seunarine, Kris
7a429cda-848c-4384-a38b-43e78b190c03
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Gadegaard, Nikolaj
bf72c3d1-e6a7-48b4-a968-c496b655bd98
Wilkinson, Chris DW
95c632cf-1213-4f90-9966-4cf4f60dd83f
Riehle, Mathis O
e608768c-0da2-40a6-af4c-44258fc86261
Martines, Elena
59495e65-fc7b-43b4-b172-5c41cea4d626
Seunarine, Kris
7a429cda-848c-4384-a38b-43e78b190c03
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Gadegaard, Nikolaj
bf72c3d1-e6a7-48b4-a968-c496b655bd98
Wilkinson, Chris DW
95c632cf-1213-4f90-9966-4cf4f60dd83f
Riehle, Mathis O
e608768c-0da2-40a6-af4c-44258fc86261

Martines, Elena, Seunarine, Kris, Morgan, Hywel, Gadegaard, Nikolaj, Wilkinson, Chris DW and Riehle, Mathis O (2005) Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns. Nano Letters, 5 (10), 2097-2103.

Record type: Article

Abstract

The hydrophilicity, hydrophobicity, and sliding behaviour of water droplets on nanoasperities of controlled dimensions were investigated experimentally. We show that the "hemi-wicking"theory for hydrophilic SiO2 samples successfully predicts the experimental advancing angles and that the same patterns, after silanization, become superhydrophobic in agreement with the Cassie-Baxter and Wenzel theories. Our model tophographies have the same dimensional scale of some naturally occurring structures that exhibit similar wetting properties. Our results confirm that a forest of hydrophilic/hydrophobic slender pillars is the most effective superwettable/water-repellent configuration. It is shown that the shape and curvature of the edges of the aspertieis play an important role in determining the advancing angles.

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Published date: December 2005
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 263182
URI: https://eprints.soton.ac.uk/id/eprint/263182
ISSN: 1530-6984
PURE UUID: b74fef99-676c-4dda-957e-757c73800f18
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676

Catalogue record

Date deposited: 14 Nov 2006
Last modified: 06 Jun 2018 12:45

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Contributors

Author: Elena Martines
Author: Kris Seunarine
Author: Hywel Morgan ORCID iD
Author: Nikolaj Gadegaard
Author: Chris DW Wilkinson
Author: Mathis O Riehle

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