Hydrogel Microellipsoids that Form Robust String-Like Assemblies at the Air/Water Interface

Kenshiro Honda, Yuka Sazuka, Kojiro Iizuka, Shusuke Matsui, Takayuki Uchihashi, Takuma Kureha, Mitsuhiro Shibayama, Takumi Watanabe, Daisuke Suzuki

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)7294-7298
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number22
Publication statusPublished - 2019 May 27


  • colloids
  • hydrogels
  • interfaces
  • microgels
  • self-organization

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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