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An Axisymmetric Flow‐Focusing Microfluidic Device
Author(s) -
Takeuchi S.,
Garstecki P.,
Weibel D. B.,
Whitesides G. M.
Publication year - 2005
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.200401738
Subject(s) - microfluidics , materials science , rotational symmetry , micrometer , polymer , flow (mathematics) , nanotechnology , polymerization , flow focusing , composite material , mechanics , optics , physics
An axisymmetric flow‐focusing microfluidic device (AFFD) is described . The AFFD (see Figure, top) produces micrometer‐sized (50–300 μm) polymer‐coated droplets (see Figure, bottom) with narrow size distributions (< 5 %). The axisymmetric geometry confines droplets to the central axis of the channel and prevents them from being sheared or damaged at the channel walls. The device is used to prepare aqueous droplets encapsulated in nylon‐6,6 membranes by carrying out interfacial polymerization reactions in situ.