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Hydrogel Microellipsoids that Form Robust String‐Like Assemblies at the Air/Water Interface
Author(s) -
Honda Kenshiro,
Sazuka Yuka,
Iizuka Kojiro,
Matsui Shusuke,
Uchihashi Takayuki,
Kureha Takuma,
Shibayama Mitsuhiro,
Watanabe Takumi,
Suzuki Daisuke
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201901611
Subject(s) - interface (matter) , string (physics) , materials science , composite material , computer science , physics , theoretical physics , capillary number , capillary action
Soft colloidal particles such as hydrogel microspheres assemble at air/water or oil/water interfaces, where the soft colloids are highly deformed and their surface polymer chains are highly entangled with each other. Herein, we report the formation of robust one‐dimensional, string‐like colloidal assemblies through self‐organization of hydrogel microspheres with shape anisotropy at the air/water interface of sessile droplets. Shape‐anisotropic hydrogel microspheres were synthesized via two‐step polymerization, whereby a hydrogel shell was formed onto preformed rigid microellipsoids. The shape anisotropy of the hydrogel microspheres was confirmed by transmission electron microscopy and high‐speed atomic force microscopy as well as by light‐scattering measurements. The present findings are crucial for the understanding of natural self‐organization phenomena, where “softness” influences microscopic assembled structures such as those of Nostoc bacteria.