Factors controlling the pinning force of liquid droplets on liquid infused surfaces

Muhammad Subkhi Sadullah, Jack R. Panter, Halim Kusumaatmaja

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Liquid infused surfaces with partially wetting lubricants have recently been exploited for numerous intriguing applications, such as for droplet manipulation, droplet collection and spontaneous motion. When partially wetting lubricants are used, the pinning force is a key factor that can strongly affect droplet mobility. Here, we derive an analytical prediction for contact angle hysteresis in the limit where the meniscus size is much smaller than the droplet, and numerically study how it is controlled by the solid fraction, the lubricant wetting angles, and the various fluid surface tensions. We further relate the contact angle hysteresis and the pinning force experienced by a droplet on a liquid infused surface, and our predictions for the critical sliding angles are consistent with existing experimental observations. Finally, we discuss why a droplet on a liquid infused surface with partially wetting lubricants typically experiences stronger pinning compared to a droplet on a classical superhydrophobic surface. This journal is
Original languageEnglish (US)
Pages (from-to)8114-8121
Number of pages8
JournalSoft matter
Issue number35
StatePublished - Sep 21 2020
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics


Dive into the research topics of 'Factors controlling the pinning force of liquid droplets on liquid infused surfaces'. Together they form a unique fingerprint.

Cite this