  In this study, we conducted a detailed experimental analysis using high-speed
imagery to explore the impact dynamics of water droplets on liquid-infused
surfaces (LIS). The LIS surfaces were created from textured substrates with
varied post-spacings and were functionalized using octadecyl trichlorosilane
(OTS). Two types of liquid-infused surfaces were investigated: those coated
with silicone oil (van der Waals) and those coated with Hexadecane (non-van der
Waals). Droplet impacts were systematically investigated on these surfaces
across a broad range of Weber numbers. Additionally, we assessed the stability
of the LIS surface by calculating cloaking and spreading coefficients. The
experimental outcomes revealed distinct droplet dynamics, including spreading,
rebound, and unique phenomena related to oil interaction with surface textures.
This study provides insights into the intricate dynamics of droplet
interactions with LIS, offering valuable contributions to understanding
surface-wetting phenomena.
