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Penn Physicists Undo the 'Coffee Ring Effect'

August 17, 2011

image of the coffee ring effect A team of University of Pennsylvania physicists has shown how to disrupt the "coffee ring effect"--the ring-shaped stain of particles left over after coffee drops evaporate--by changing the particle shape. The discovery provides new tools for engineers to deposit uniform coatings. Full Story

University of Pennsylvania

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The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering. In fiscal year (FY) 2016, its budget is $7.5 billion. NSF funds reach all 50 states through grants to nearly 2,000 colleges, universities and other institutions. Each year, NSF receives more than 48,000 competitive proposals for funding and makes about 12,000 new funding awards. NSF also awards about $626 million in professional and service contracts yearly.

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