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<p>Structuring liquids can be achieved by the assembly and jamming of particles at the oil-water interface. However, this typically requires surface modification of particles or co-assembly with polymer ligands to enhance interfacial binding energies. Here, we show a simple and robust strategy to structure liquids by using water-soluble, star-shaped β-cyclodextrin (β-CD) derivatives, whose interfacial assembly is driven by supramolecular interactions with oil solvents. Three classes of solvents including alkanes, aromatic hydrocarbons and halohydrocarbons are examined, leading to distinct interfacial binding energies of β-CD derivatives and different liquid structuring and coalescence behaviors. In aromatic hydrocarbon/water biphasic systems, β-CD derivatives form jammed yet porous interfacial assemblies that combine mechanical rigidity with high free volume. As a result, the liquids are shapeable, reconfigurable and capable of arrested coalescence upon gentle contact, opening opportunities for programmable liquid constructs, soft robots, and related applications.</p>

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Arrested coalescence in structured liquids

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月17日

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  • Peifan Li,
  • Weixiao Feng,
  • Yunhui Wen,
  • Yuzheng Luo,
  • Xueqing Liu,
  • Shaowei Shi

摘要

Structuring liquids can be achieved by the assembly and jamming of particles at the oil-water interface. However, this typically requires surface modification of particles or co-assembly with polymer ligands to enhance interfacial binding energies. Here, we show a simple and robust strategy to structure liquids by using water-soluble, star-shaped β-cyclodextrin (β-CD) derivatives, whose interfacial assembly is driven by supramolecular interactions with oil solvents. Three classes of solvents including alkanes, aromatic hydrocarbons and halohydrocarbons are examined, leading to distinct interfacial binding energies of β-CD derivatives and different liquid structuring and coalescence behaviors. In aromatic hydrocarbon/water biphasic systems, β-CD derivatives form jammed yet porous interfacial assemblies that combine mechanical rigidity with high free volume. As a result, the liquids are shapeable, reconfigurable and capable of arrested coalescence upon gentle contact, opening opportunities for programmable liquid constructs, soft robots, and related applications.