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Issue 4, 2017
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Tunable superapolar Lotus-to-Rose hierarchical nanosurfaces via vertical carbon nanotubes driven electrohydrodynamic lithography

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Abstract

The development of a robust, cost-effective, scalable and simple technique that enables the design and construction of well-controlled large area superhydrophobic surface structures which can be easily tuned from lotus-leaf to rose-petal state is essential to enable progress in realising the full applied potential of such surfaces. In this study, we introduce the tuneable carbon nanotubes-based electrohydrodynamic lithography (CNT-EHL) to fabricate unique multiscale structured cones and nanohair-like architectures with various periodicities and dimensions, successfully enabling surface energy minimization. The possibility of contact-less lithography via the CNT-EHL morphology replication combined with the electric field coupling to smaller self-assembled patterns within the film, provides a way for hierarchical structure control spanning many length scales along with tuneable wetting capabilities. By controlling the hierarchy of micro- to nano cones and spikes, these morphologies provide a range of architectures with sufficient roughness for very low wettability, with the highest contact angle achieved of 173° and their properties can be easily switched between lotus-leaf to rose-petal behaviour.

Graphical abstract: Tunable superapolar Lotus-to-Rose hierarchical nanosurfaces via vertical carbon nanotubes driven electrohydrodynamic lithography

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Supplementary files

Article information


Submitted
07 Nov 2016
Accepted
01 Jan 2017
First published
04 Jan 2017

This article is Open Access

Nanoscale, 2017,9, 1625-1636
Article type
Paper

Tunable superapolar Lotus-to-Rose hierarchical nanosurfaces via vertical carbon nanotubes driven electrohydrodynamic lithography

C. Busà, J. J. S. Rickard, E. Chun, Y. Chong, V. Navaratnam and P. Goldberg Oppenheimer, Nanoscale, 2017, 9, 1625
DOI: 10.1039/C6NR08706J

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