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Updated: May 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Plasmon-Enhanced Multiphoton Polymer Crosslinking for Selective Modification of Plasmonic Hotspots.

Yevhenii M Morozov¹, Nestor Gisbert Quilis², Stefan Fossati³

¹Center for Health & Bioresources, AIT-Austrian Institute of Technology, Giefinggasse 4, 1210 Vienna, Austria.

The Journal of Physical Chemistry. C, Nanomaterials and Interfaces

|November 6, 2024

Summary

Researchers developed a new method to precisely alter metallic nanostructures using plasmonically enhanced multiphoton crosslinking (MPC). This technique precisely modifies areas near plasmonic hotspots, creating advanced hybrid materials for spectroscopy and bioanalysis.

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Published on: August 18, 2020

Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Plasmonic hotspots on metallic nanostructures exhibit strong electromagnetic field amplification.
Localized surface plasmon (LSP) excitation is key to manipulating these fields.
Existing methods like surface plasmon-triggered polymerization have limitations in selectivity.

Purpose of the Study:

To introduce a novel method for selective modification of metallic nanostructures at plasmonic hotspots.
To utilize plasmonically enhanced multiphoton crosslinking (MPC) for precise material functionalization.
To demonstrate the creation of hybrid metallic/hydrogel materials with tunable properties.

Main Methods:

Utilizing plasmonically enhanced multiphoton crosslinking (MPC) triggered by femtosecond near-infrared laser irradiation.
Coating gold nanoparticle arrays with polymers functionalized with photoactive moieties.
Employing atomic force microscopy (AFM) to visualize localized MPC.
Using polarization-resolved localized surface plasmon resonance (LSPR) spectroscopy to confirm hydrogel behavior.

Main Results:

Demonstrated selective MPC on poly(N,N-dimethylacrylamide)-based copolymers at plasmonic hotspots.
Confirmed MPC with thermoresponsive poly(N-isopropylacrylamide)-based terpolymers.
Observed reversible hydrogel collapse and swelling at specific nanoparticle locations via LSPR.
Showcased the potential for postmodification of the hybrid materials.

Conclusions:

Plasmonically enhanced MPC offers a precise route for modifying nanostructures adjacent to hotspots.
The developed hybrid metallic/hydrogel materials exhibit controllable properties.
These materials hold promise for advanced spectroscopic and bioanalytical applications.