Apparent contact angle of drops on liquid infused surfaces: geometric interpretation

Semprebon, Ciro, Sadullah, Muhammad Subkhi, McHale, Glen and Kusumaatmaja, Halim (2021) Apparent contact angle of drops on liquid infused surfaces: geometric interpretation. Soft Matter. ISSN 1744-683X (In Press)

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We theoretically investigate the apparent contact angle of drops on liquid infused surfaces as a function of the relative size of the wetting ridge and the deposited drop. We provide an intuitive geometrical interpretation whereby the variation in the apparent contact angle is due to the rotation of the Neumann triangle at the lubricant–drop–gas contact line. We also derive linear and quadratic corrections to the apparent contact angle as power series expansion in terms of pressure differences between the lubricant, drop and gas phases. These expressions are much simpler and more compact compared to those previously derived by Semprebon et al. [Soft Matter, 2017, 13, 101–110].

Item Type: Article
Additional Information: Funding information: CS acknowledges support from Northumbria University through the Vice-Chancellor's Fellowship Programme and EPSRC (EP/S036857/1) for funding. MSS is supported by funding from King Abdullah University of Science and Technology (KAUST) under the award number BAS/1/1070-01-01. HK acknowledges funding from EPSRC (EP/V034154/1).
Subjects: F100 Chemistry
F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
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Depositing User: Rachel Branson
Date Deposited: 19 Aug 2021 09:46
Last Modified: 08 Oct 2021 08:59

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