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. 2015 Dec 7;5:17757. doi: 10.1038/srep17757

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Copyright © 2015, Macmillan Publishers Limited

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(a) Fog water collecting phenomenon of the scale-covered spine. Drop 1′ formed on the spine and moved to the bottom of the spine. Subsequently drop 2′ formed and coalesced with drop 1′ and drop (1 + 2)′ was obtained. After the formation of drop (1 + 2)′, drop 3′ and drop 4′ formed in turn and then both of them moved to the bottom of the spine. (b) The moving velocities of the fog drops 1′, 3′ and 4′ without influence of coalescence. Both of drops 3′ and 4′ moved more quickly than drop 1′.