Slippery liquid-infused porous surfaces (SLIPS) are gaining remarkable attention and have advanced performance in many fields. Although all SLIPS are related to lubricant-impregnation within nano/microstructures on a surface, they differ in many aspects, such as the morphology of droplets, the state of cloaking, the wetting edge, and the lubricant thickness. Requirements of the droplet morphology on SLIPS might change according to a specific application. A molecular-dynamics-based numerical model that can correctly simulate SLIPS is developed and is validated by comparing against the theoretical predictions for all possible stable states for a given droplet, lubricant, and solid surface. On the basis of this model, a detailed analysis of the equilibrium states is conducted. In particular, we discover that the four possible stable states on SLIPS predicted by theoretical studies can be extended to eight states by considering the effects of lubricant thickness and surface geometry in addition to the interfacial tension and surface wettability. These findings could be used to determine the conditions under which a thermodynamically stable state exists on SLIPS. The dynamic behavior of a nanodroplet on SLIPS is also studied, which provides insight into how a proper increase in the lubricant thickness might increase the sliding velocity. The above findings and developed model are expected to provide significant guidelines for designing SLIPS.
Both ICL implantation and LRS are safe and effective procedures for myopia with suitable indications, but ICL implantation is more stable. Fewer induced aberrations are gained after ICL implantation.
The
surface dynamic wettability during droplet nucleation and growth
involved with phase change is different from the static wettability
formed from a sessile drop. Revealing this dynamic wettability of
the lubricant-impregnated surfaces (LISs) and identification of the
consistency between the wettability during condensation and the static
wettability are of significant importance. In this study, we investigated
condensation of water droplets on LISs using molecular dynamics simulations.
All possible morphologies on LISs were investigated considering the
effects of interfacial tension and lubricant thickness. The exploration
of droplet behaviors from nucleation to growth and coalescence revealed
four nucleation mechanisms and six growth modes. The lubricant was
observed to be beneficial for the formation of droplets and maintaining
dropwise condensation mode. The present investigation also established
that the consistency between the wettability during condensation and
the static wettability was determined by the solid–water–oil
interface and the lubricant thickness. A map was proposed which helps
in deciding whether the wettability during condensation is the same
as the static wettability on LIS.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.