Hydrodynamic Elastocapillary Morphing of Hair Bundles

We report polymorphic self-assembly of hair arranged in hollow bundles driven by capillarity, hydrodynamics, and elasticity. Bundles emerging from a liquid bath shrink but remain hollow at slow drainage due to the negative pressure of the menisci trapped between the hairs. The timescale allows the c...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2020-12, Vol.125 (25), p.254503-254503, Article 254503
Main Authors: Ha, Jonghyun, Kim, Yun Seong, Jiang, Kaiying, Siu, Ryan, Tawfick, Sameh
Format: Article
Language:English
Subjects:
Bundles
Bundling
Capillarity
Drainage
Fluid dynamics
Fluid flow
Hair
Hydrodynamics
Menisci
Morphing
Polymorphism
Scaling laws
Self-assembly
Stiffening
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report polymorphic self-assembly of hair arranged in hollow bundles driven by capillarity, hydrodynamics, and elasticity. Bundles emerging from a liquid bath shrink but remain hollow at slow drainage due to the negative pressure of the menisci trapped between the hairs. The timescale allows the collective stiffening of the fibers to resist closure. At fast drainage, the bundles fully close before the liquid can drain through the hair. A liquid column trapped in the hole closes the bundle while the lubricated hairs still behave softly. Scaling laws predict this reversible hair polymorphism.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.125.254503