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

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

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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].
Original languageEnglish (US)
JournalSoft Matter
StatePublished - Aug 19 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-09-16
Acknowledged KAUST grant number(s): BAS/1/1070-01-01
Acknowledgements: 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).

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics


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