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Cryo-electron Microscopy01:28

Cryo-electron Microscopy

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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications
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Freezing-Induced Spatial Confinement During Cryo-Polymerization Enables Stable Intrinsic Luminescence in Hydrogels.

Shumiao Li1,2, Ji Liu1,2, Mang Zhao1

  • 1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China.

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|June 20, 2026
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Summary

Researchers developed a new method for creating luminescent polymer hydrogels that work even when very wet. This breakthrough uses directional freezing to stabilize light-emitting clusters, enabling new applications in soft electronics and data security.

Keywords:
clusterization‐triggered emissioncryo‐polymerizationhydrogelsintrinsic luminescencestability

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Achieving intrinsic luminescence in polymer hydrogels is crucial for soft optoelectronics and information security.
  • Hydration often quenches clusterization-triggered emission (CTE) by disrupting intermolecular interactions.

Purpose of the Study:

  • To develop a general strategy for achieving robust CTE in polymer hydrogels under hydrated conditions.
  • To overcome the challenge of water-induced quenching in luminescent soft materials.

Main Methods:

  • Directional freezing-assisted cryo-polymerization to induce spatial confinement during network formation.
  • Utilizing anisotropic ice crystal growth to promote dense chain packing and stabilize emissive clusters.
  • Developing polyacrylamide hydrogels with ultrahigh water content (∼90 wt%).

Main Results:

  • Demonstrated a robust CTE effect in hydrogels with up to 90% water content, overcoming hydration-induced quenching.
  • The resulting polyacrylamide hydrogel exhibits stable blue emission, structural integrity, and mechanical softness.
  • The material shows elasticity, shape programmability, and enables rewritable, multilevel information encryption.

Conclusions:

  • Stable intrinsic luminescence in water-rich soft materials can be achieved via structural confinement, not just molecular modification.
  • This provides a general design principle for CTE systems and integrates optical functionality with structural programmability.
  • Opens new avenues for advanced soft optoelectronic and information-security applications.