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Microfluidics: Controlling Liquid Drops with Texture Ratchets (Adv. Mater. 12/2012)
Author(s) -
Duncombe Todd A.,
Erdem E. Yegân,
Shastry Ashutosh,
Baskaran Rajashree,
Böhringer Karl F.
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201290067
Subject(s) - polydimethylsiloxane , materials science , drop (telecommunication) , microfluidics , texture (cosmology) , elastomer , nanotechnology , composite material , optics , image (mathematics) , artificial intelligence , computer science , physics , telecommunications
Controlled vibration selectively propels multiple microliter‐sized drops along texture ratchets: microstructured tracks that rectify oscillations of the three‐phase contact line into asymmetric pinning forces that propel each drop in the direction of higher pinning, as investigated by K. F. Böhringer and co‐workers on page 1545 . This superimposed time‐lapse image depicts two pairs of 5 μL dyed water drops traveling and finally merging simultaneously on regular and upside‐down texture ratchets molded in polydimethylsiloxane elastomer.