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A study on the wetting properties of broccoli leaf surfaces and their time dependent self-healing after mechanical damage

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Abstract

Plants are protected from the elements by a complex hierarchical epicuticular wax layer which has inspired the creation of super-hydrophobic and self-cleaning surfaces. Although many studies have been conducted on different plant wax systems to determine the mechanisms of water repulsion hardly any have studied the recovery of the epicuticular wax layer. In the current study the wetting properties and crystallographic nature of the wax surface of Brassica oleracea var. italica (broccoli) has been studied, as well as the time-dependent recovery of the surface after mechanical damage. It was found that the surface of the broccoli leaves is not only super-repulsive and self-cleaning in regards to water but also in regards to glycerol and formamide, both of which have considerably lower surface tension values. Furthermore, it was shown that the surface properties do indeed recover after damage and that this recovery is multi-stepped and strongly dependent on the recovery of the roughness of the surface.

Graphical abstract: A study on the wetting properties of broccoli leaf surfaces and their time dependent self-healing after mechanical damage

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Publication details

The article was received on 30 May 2018, accepted on 29 Jul 2018 and first published on 30 Jul 2018


Article type: Paper
DOI: 10.1039/C8SM01115J
Citation: Soft Matter, 2018, Advance Article
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    A study on the wetting properties of broccoli leaf surfaces and their time dependent self-healing after mechanical damage

    B. B. Rich and B. Pokroy, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM01115J

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