期刊
ADVANCES IN COLLOID AND INTERFACE SCIENCE
卷 161, 期 1-2, 页码 10-14出版社
ELSEVIER
DOI: 10.1016/j.cis.2010.01.002
关键词
Contact angle hysteresis; Self-propulsion; Capillary ratchet
We describe the physics behind a peculiar feeding mechanism of a certain class of shorebirds, in which they transport their prey in droplets from their beak tips mouthwards. The subtle interplay between the drop and the beak's tweezering motion allows the birds to defy gravity through driving the drop upwards. This mechanism provides a novel example of dynamic boundary-driven drop motion, and suggests how to design tweezers for drops, able to trap and to move small amounts of liquid. (C) 2010 Published by Elsevier B.V.
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