The Coffee Ring Effect - Intriguing Microscopic Video

This never-before-seen footage from a laboratory at the University of Pennsylvania's Department of Physics and Astronomy shows microscopic particles moving in a drop as it dries.

Penn physicists have recently shown that simply changing particle shape can eliminate the ring-shaped stain that is left behind when drops of certain liquids dry. In this video microscopy footage from their experiments, watch as spherical particles get swept to the edges, while oblong particles are distributed consistently.

Video and Music Composition by Kurtis Sensenig
kurtiss@upenn.edu

• Category

  Science & Technology

[PiefaceclownPrdctns]

I like the music choice; science is always better with creepy music

[azuritereaction]

immediately put into the "beyond epic" playlist i've got

[Dmitrij Bugajev]

Sorcery! Burn the witch!

[Ole Olson]

I love science

[Joyce Clark]

Me too!!!

[kevinlovephysics]

nice vedio, excellent music ( though a little scary ;-) )

[towert7]

It is amazing what you can study with a 0.35$ cup of coffee!

Thanks for the nice talk Arjun.

[ade harnusa azril]

this is a scary shit...

[Brian Estremos]

Coffee stains dries up? Never thought about that. Actually, I've never seen anything like that.

[ChrisStavros]

Watching coffee stains dry up is better than what usually goes on at Pennsylvania universities.