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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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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.
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.
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