Journal
SOFT MATTER
Volume 12, Issue 5, Pages 1593-1600Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm02354h
Keywords
-
Categories
Funding
- Deutsche Forschungsgemeinschaft [KA 1808/12-1]
Ask authors/readers for more resources
An evaporating droplet is a dynamic system in which flow is spontaneously generated to minimize the surface energy, dragging particles to the borders and ultimately resulting in the so-called coffee-stain effect''. The situation becomes more complex at the droplet's surface, where surface tension gradients of different natures can compete with each other yielding different scenarios. With careful experiments and with the aid of 3D particle tracking techniques, we are able to show that different types of surfactants turn the droplet's surface either rigid or elastic, which alters the evaporating fluid flow, either enhancing the classical coffee-stain effect or leading to a total flow inversion. Our measurements lead to unprecedented and detailed measurements of the surface tension difference along the evaporating droplet's surface with good temporal and spatial resolution.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available