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Chinese Brushes: Controllable Liquid Transfer in Ratchet Conical Hairs
Author(s) -
Wang Qianbin,
Su Bin,
Liu Huan,
Jiang Lei
Publication year - 2014
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.201400865
Subject(s) - brush , materials science , ratchet , conical surface , mass transfer , anisotropy , laplace pressure , nanotechnology , mechanics , chemical physics , optics , composite material , surface tension , physics , thermodynamics , work (physics)
The controllable liquid transfer of a Chinese brush is attributable to the unique anisotropic multi‐scale structures of the freshly emergent hairs. A large mass of liquid an be dynamically balanced within the brush as a cooperative effect of the Laplace pressure difference, the asymmetrical retention force, and gravity. Inspired by this, a device is developed with parallel hairs that allows for direct writing of micro‐lines.