Ever notice how a dried coffee stain has a thicker outer rim, while the middle of the stain remains almost unsoiled? This 'coffee ring effect' also occurs in other materials. Researchers from the Departments ...

Chemistry - Other

May 14, 2013 5 / 5 (5) 0

A team of University of Pennsylvania physicists has shown how to disrupt the "coffee ring effect" — the ring-shaped stain of particles leftover after coffee drops evaporate — by changing the particle ...

Physics - General Physics

Aug 17, 2011 4.6 / 5 (15) 1 |

(PhysOrg.com) -- The field of biosensing has recently found an unlikely partner in the quest for increased sensitivity: coffee rings. The next time you spill your coffee on a table, look at the spot left after ...

Nanotechnology - Nanophysics

May 05, 2010 3.5 / 5 (2) 0 |