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

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

doi:10.1039/d1sm00704a

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

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

Authors

Ciro Semprebon

Muhammad Subkhi Sadullah

Glen McHale

Professor Halim Kusumaatmaja halim.kusumaatmaja@durham.ac.uk
Professor

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