TMNN-2011. Proceedings of the International Symposium on Thermal and Materials Nanoscience and Nanotechnology
DOI: 10.1615/ICHMT.2011.TMNN-2011
ISBN Print: 978-1-56700-271-3
ISSN: 2642-5386
"COFFEE STAIN EFFECT" AND "CHEERIOS EFFECT" IN AN EVAPORATING DROP
page 7
DOI: 10.1615/ICHMT.2011.TMNN-2011.210
ABSTRACT
We report that high and low density particles in a sessile evaporating drop migrate respectively toward the edge and the center of the drop by "coffee stain effect" and "Cheerios effect." By analyzing the distribution of particles in a dried drop, we reveal that the particles can be separated efficiently at small contact angles.