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Updated: Jan 13, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

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Published on: September 27, 2011

Optical field-induced mass transfer in plasmonic electrochemistry.

Johann V Hemmer¹, Md Al-Amin¹, Andrew J Wilson¹

¹Department of Chemistry, University of Louisville, Louisville, USA. aj.wilson@louisville.edu.

Chemical Communications (Cambridge, England)

|January 9, 2026

Summary

This study separates heat-driven convection from light-intensity effects in plasmon-assisted reactions. Understanding these distinct mechanisms is key for optimizing catalytic efficiency.

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

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

Published on: July 21, 2018

Area of Science:

Electrochemistry
Plasmonics
Chemical Engineering

Background:

Plasmon-assisted electrochemical reactions are crucial for various catalytic processes.
The exact mechanisms enhancing reaction rates, such as photothermal effects and optical field effects, are not fully understood.
Differentiating these contributions is essential for designing efficient catalytic systems.

Purpose of the Study:

To experimentally separate the photothermally-induced natural convection from optical field-mediated effects in plasmon-assisted electrochemical reactions.
To elucidate the distinct roles of heat transfer and light intensity/wavelength in reaction rate enhancement.
To provide a clearer understanding of rate-enhancement mechanisms for future catalyst design.

Main Methods:

Utilizing plasmonic nanoparticles to drive electrochemical reactions under controlled illumination.
Employing techniques to decouple mass transfer contributions from natural convection (photothermal effect).
Analyzing the influence of light intensity and wavelength on reaction rates, isolating the optical field-mediated effect.

Main Results:

Demonstrated a method to distinguish between photothermal convection and optical field effects.
Quantified the relative contributions of each mechanism to the overall rate enhancement.
Showcased how light intensity and wavelength independently influence reaction kinetics via the optical field effect.

Conclusions:

The study successfully differentiated between heat-driven mass transfer and direct optical field effects in plasmonic catalysis.
Findings highlight the importance of considering both thermal and optical phenomena for optimizing plasmon-assisted electrochemical reactions.
This work provides a foundation for targeted catalyst design by controlling specific rate-enhancement pathways.