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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

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Two-Dimensional Polymer Networks Locking on Inorganic Nanoparticles.

Xingfu Tao¹, Yang Li¹, Linxiuzi Yu¹

¹State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.

Angewandte Chemie (International Ed. in English)

|December 19, 2022

Summary

We developed high-curvature 2D polymerization to create single-layer two-dimensional polymers (2DPs) as non-contact ligands for nanoparticles (NPs). This method enables NP stabilization and functionalization, overcoming previous limitations on curved surfaces.

Keywords:

High-Curvature Two-Dimensional Polymerization Network Structure Non-Contact Ligand Surface Functionalization Two-Dimensional Polymer

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Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Two-dimensional polymers (2DPs) are single-layer covalently linked networks with potential applications in membranes and electronics.
Conventional 2D polymerization methods struggle with forming 2DPs on high-surface-curvature nanoparticles (NPs).

Purpose of the Study:

To develop a high-curvature 2D polymerization technique for creating 2DP networks on NPs.
To functionalize NPs using 2DPs as non-contacting ligands for stabilization and surface modification.

Main Methods:

High-curvature 2D polymerization of amphiphilic Gemini monomers directly on NP surfaces.
In situ polymerization on NPs of varying sizes, shapes, and materials.
Selective etching of core-shell NPs to isolate 2DP ligands.

Main Results:

Formation of highly cross-linked, single-layer 2DP networks on high-curvature NP surfaces.
Demonstration of 2DPs as non-contact ligands in yolk-shell structures with preserved NP shape and high surface accessibility.
Successful covalent linking of functional molecules to 2DP ligands via copolymerization.

Conclusions:

The proposed high-curvature 2D polymerization effectively forms 2DP networks on NPs, enabling their stabilization and functionalization.
This approach overcomes limitations of previous methods for 2DP synthesis on curved substrates.
The developed 2DP ligands offer a versatile platform for modifying NP properties and applications.