Quantcast
Last updated on April 24, 2014 at 1:21 EDT

Latest Peter Yunker Stories

Math Behind Growth Of 'Coffee Rings' Shown With Help From Penn Physicists
2013-01-18 14:43:58

University of Pennsylvania Last year, a team of University of Pennsylvania physicists showed how to undo the “coffee-ring effect,” a commonplace occurrence when drops of liquid with suspended particles dry, leaving a ring-shaped stain at the drop´s edges. Now the team is exploring how those particles stack up as they reach the drop´s edge, and they discovered that different particles make smoother or rougher deposition profiles at the drop edge depending on their...