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Updated: Dec 22, 2025

Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating

Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating

Published on: February 20, 2016

Efficient Hot Electron Transfer from Small Au Nanoparticles.

Yawei Liu¹, Qiaoli Chen^1,2, David A Cullen³

¹Department of Chemistry, Emory University, 1515 Dickey Drive, NE, Atlanta, Georgia 30322, United States.

|May 7, 2020

Summary

This summary is machine-generated.

Smaller gold nanoparticles significantly boost plasmon-induced hot electron transfer efficiency in photocatalysis. This research demonstrates that decreasing gold (Au) particle size enhances hot carrier transfer, crucial for improving plasmonic photocatalytic devices.

Keywords:

Surface plasmon resonance hot carrier photocatalysis hot electron transfer nanorods surface damping

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Last Updated: Dec 22, 2025

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Area of Science:

Materials Science
Photocatalysis
Nanotechnology

Background:

Plasmonic hot carrier photocatalysis enables key chemical transformations.
Current applications are limited by low photocatalytic efficiencies.
Optimizing hot electron transfer is essential for practical plasmonic devices.

Purpose of the Study:

Investigate the impact of gold (Au) particle size on plasmon-induced hot electron transfer efficiency.
Examine Au-tipped cadmium sulfide (CdS) nanorods.
Provide insights for improving plasmonic hot carrier-based devices.

Main Methods:

Fabrication of Au-tipped CdS nanorods with varying Au particle sizes.
Ultrafast spectroscopic techniques to probe hot electron transfer dynamics.
Analysis of plasmon resonance and surface damping effects.

Main Results:

Hot electron transfer from Au to CdS occurs on an ultrafast timescale (≪140 fs).
Decreasing Au particle size increases plasmon width due to surface damping.
Quantum efficiency of hot electron transfer increases from ~1% to ~18% as Au particle size decreases from 5.5 nm to 1.6 nm.

Conclusions:

Smaller Au nanoparticles enhance both hot electron generation and transfer efficiencies.
Reducing plasmonic particle size is an effective strategy to improve hot carrier transfer.
Findings offer guidance for the rational design of efficient plasmonic photocatalytic systems.