Multimedia Gallery - If a drop contains elongated particles they spread to cover the entire surface of a dried droplet.

elongated particles that form clumps in a droplet eventually covering its surface.

August 15, 2011

If a drop contains elongated particles they spread to cover the entire surface of a dried droplet.

Elongating the shape of the particles in the droplet changes the way they distribute themselves within the liquid. Elongated or ellipsoidal particles form clumps that will eventually spread to cover the entire surface of the droplet, filling it so an even coating of particles is deposited when evaporation is complete.

Credit: Peter J. Yunker and Arjun G. Yodh, University of Pennsylvania

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