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Efficient Stabilization and Functionalization of Large Gold Nanoparticles Using N-Heterocyclic Carbenes-Based Polymer

Yutian Tang1, Jing Tao1, Di Zheng1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Metasurfaces for Light Manipulation, Department of Macromolecular Science, Fudan University, Shanghai, P. R. China.

Macromolecular Rapid Communications
|March 25, 2026
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Summary

Researchers developed a new method using N-heterocyclic carbene (NHC)-anchored polymer ligands to stabilize and functionalize large gold nanoparticles (AuNPs). This approach ensures excellent stability and allows for versatile surface modifications for advanced applications.

Keywords:
N‐heterocyclic carbeneslarge AuNPsnanoparticles assembliespolymer ligandssurface functionalization

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Stabilizing and functionalizing large nanoparticles (NPs) presents a significant challenge in nanomaterials research.
  • Existing methods often struggle with maintaining colloidal stability under diverse conditions.

Purpose of the Study:

  • To develop a robust strategy for stabilizing and functionalizing large gold nanoparticles (AuNPs).
  • To enable tunable surface chemistry for the formation of defined nanoparticle assemblies.

Main Methods:

  • Employing N-heterocyclic carbene (NHC)-anchored polymer ligands for AuNP stabilization and functionalization.
  • Utilizing ammonolysis reactions for in situ incorporation of functional groups onto AuNP surfaces.
  • Investigating AuNP stability under various solvents and thermal conditions.

Main Results:

  • Successfully stabilized gold nanoparticles (AuNPs) with diameters from 15 to 106 nm.
  • Achieved outstanding colloidal stability in diverse solvents and up to 135°C.
  • Demonstrated efficient surface functionalization for creating NP assemblies with tunable properties.

Conclusions:

  • The NHC-polymer ligand approach provides a versatile platform for producing stable, large AuNPs.
  • This method enhances the potential applications of AuNPs in catalysis, optics, and biomedical fields.
  • Offers a scalable solution for advanced nanomaterial development.