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 shape. The ...
General Physics
Aug 17, 2011
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(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 the liquid ...
Nanophysics
May 5, 2010
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An international research team, led by Monash University, has discovered for the first time the mystery behind the formation of 'coffee rings' by examining the contact angle of droplets onto a surface, and how they dry.
Soft Matter
Mar 29, 2021
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368
Spilled coffee forms a ring as the liquid evaporates, depositing solids along the edge of the puddle. This "coffee ring effect" has fascinated scientists for decades, but now a team says they have uncovered the mechanism ...
Nanomaterials
Mar 25, 2020
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226
Researchers from Tokyo Metropolitan University have discovered a new way of controlling the drying patterns formed by re-crystallizing salt. They found that the coffee ring effect can be used to pin the edge of drying droplets, ...
Condensed Matter
Sep 24, 2018
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A new manufacturing technique developed by researchers from Binghamton University, State University at New York may be able to avoid the "coffee ring" effect that plagues inkjet printers.
Materials Science
Aug 16, 2018
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68
"What's in your water?" has become an increasingly fraught question for many people in the U.S. and around the world. Getting the answer isn't always easy or cheap. Today, scientists are reporting that they are using the ...
Analytical Chemistry
Aug 22, 2017
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394
(Phys.org)—A team of researchers at Princeton University, along with assistance from a photographer in Arizona, has uncovered the secret behind why whisky does not leave behind "coffee rings" when in dries. In their paper ...
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 of Chemical Engineering ...
Other
May 14, 2013
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