Penn physicists discover why drying liquid crystal drops leave unusual 'coffee rings'

Penn physicists discover why drying liquid crystal drops leave unusual 'coffee rings' 06/07/2017 10:32 AM EDT In previous papers, University of Pennsylvania (UPenn) physicists investigated the "coffee ring effect," the ring-shaped stain of particles left after drops of coffee evaporate. In a new paper published in Nature Communications, they have uncovered the complex and remarkably different behavior arising in a liquid crystal drop that is drying. The research reveals novel behavior characteristics of liquid crystals. Full story at https://news.upenn.edu/news/penn-physicists-discover-why-drying-liquid-crystal-drops-leave-unusual-coffee-rings Source University of Pennsylvania This is an NSF News From the Field item.   Follow NSF:  This email was sent using GovDelivery Communications Cloud on behalf of: National Science Foundation Update · 4201 Wilson Boulevard · Arlington, VA 22230 · 703-292-5111