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

Semprebon, Ciro; Sadullah, Muhammad Subkhi; McHale, Glen; Kusumaatmaja, Halim

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Authors

Ciro Semprebon

Muhammad Subkhi Sadullah

Glen McHale



Abstract

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].

Citation

Semprebon, C., Sadullah, M. S., McHale, G., & Kusumaatmaja, H. (2021). Apparent contact angle of drops on liquid infused surfaces: geometric interpretation. Soft Matter, 17(42), 9553-9559. https://doi.org/10.1039/d1sm00704a

Journal Article Type Article
Acceptance Date Aug 18, 2021
Online Publication Date Aug 18, 2021
Publication Date Nov 14, 2021
Deposit Date Oct 19, 2021
Publicly Available Date Oct 19, 2021
Journal Soft Matter
Print ISSN 1744-683X
Electronic ISSN 1744-6848
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 17
Issue 42
Pages 9553-9559
DOI https://doi.org/10.1039/d1sm00704a
Public URL https://durham-repository.worktribe.com/output/1234418

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