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Photo-Induced Cross-Linking of Unmodified Proteins PICUP Applied to Amyloidogenic Peptides

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Covalent-Cross-Linked Plasmene Nanosheets.

Yiyi Liu^1,2, Bo Fan³, Qianqian Shi^1,2

¹Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia.

|May 31, 2019

Summary

This summary is machine-generated.

We stabilized gold nanoparticle superlattices (plasmene) using photo-cross-linkable ligands, preventing solvent-induced dissociation. This innovation enables stable plasmene for solvent sensing and dynamic plasmonic displays.

Keywords:

covalent-cross-linked gold nanoparticles plasmene nanosheets plasmonic switching solvent responsive

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Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Thiol-polystyrene (SH-PS)-capped plasmonic nanoparticles form superlattice sheets (plasmene) stabilized by ligand entanglement.
These plasmene sheets are prone to irreversible dissociation in organic solvents, limiting their applications.

Purpose of the Study:

To enhance the stability of plasmene nanosheets in organic solvents.
To develop a method for creating chemically locked nanoparticle assemblies.
To explore the potential of stabilized plasmene for sensing and display applications.

Main Methods:

Introducing coumarin-based photo-cross-linkable moieties to SH-PS ligands for gold nanoparticles.
Fabricating one-nanoparticle-thick superlattice sheets (plasmene) with modified ligands.
Investigating the structural integrity and optical properties of cross-linked plasmene in various organic solvents.

Main Results:

Cross-linked plasmene nanosheets maintained structural integrity in organic solvents.
Ligand swelling in response to solvents caused reversible changes in interparticle spacing.
Significant and reversible optical responses to different solvents were observed.

Conclusions:

Photo-cross-linking provides a robust method to stabilize plasmene nanosheets against solvent-induced dissociation.
The solvent-responsive optical properties of stabilized plasmene offer potential for advanced sensing and dynamic display technologies.