Topic
Sessile drop technique
About: Sessile drop technique is a research topic. Over the lifetime, 2827 publications have been published within this topic receiving 68943 citations.
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TL;DR: A sessile drop of a nonvolatile (ionic) liquid which is embedded in a slowly evaporating lubricant film (n-decane) on a horizontal, planar solid substrate is studied and the size of the meniscus is particularly relevant because it affects sliding angles of drops on lubricant-infused surfaces.
Abstract: Motivated by the development of lubricant-infused slippery surfaces, we study a sessile drop of a nonvolatile (ionic) liquid which is embedded in a slowly evaporating lubricant film (n-decane) on a horizontal, planar solid substrate. Using laser scanning confocal microscopy we imaged the evolution of the shape of the liquid/liquid and liquid/air interfaces, including the angles between them. Results are compared to solutions of the generalized Laplace equations describing the drop profile and the annular wetting ridge. For all film thicknesses, experimental results agree quantitatively with the calculated drop and film shapes. With the verified theory we can predict height and volume of the wetting ridge. Two regimes can be distinguished: for macroscopically thick films (excess lubrication) the meniscus size is insensitive to changes in film thickness. Once the film is thin enough that surface forces between the lubricant/air and solid/lubricant interfaces become significant the meniscus changes significantly with varying film thickness (starved lubrication). The size of the meniscus is particularly relevant because it affects sliding angles of drops on lubricant-infused surfaces.
43 citations
TL;DR: In this article, the influence of surfactant in the presence of several key factors, such as dynamic and thermal factors, was studied experimentally: a small droplet falls on a large sessile drop located on a hot wall and the temperature of the falling droplet is 20°C, and the wall temperature is 80°C.
43 citations
TL;DR: In this article, the influence of corrosion on water wettability of ASTM A36 steel was investigated using contact angle tests based on sessile drop method, and it was observed that increase in surface roughness results in increase in the water wetability of steel proving the above stated hypothesis.
43 citations
TL;DR: In this article, the line tension of the three-phase contact zone of a sessile drop was determined experimentally using the modified Young equation and a linearized form of the Young equation.
43 citations
TL;DR: In this article, the slime effects on hydrophobicity of ZnS surface were investigated using contact angle (captive bubble and sessile drop) and atomic force microscopy (AFM) with tapping mode imaging technique.
43 citations