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Updated: Feb 5, 2026
09:29
Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
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Plasmon-induced hot electron transfer in AgNW@TiO2@AuNPs nanostructures
Jiaji Cheng1,2, Yiwen Li3,4, Marie Plissonneau1
1CNRS, Univ. Bordeaux, ICMCB, UMR 5026, F-33608, Pessac, France.
Scientific Reports
|September 22, 2018
Summary
Plasmonic nanoparticles with titanium dioxide shells efficiently convert light into energy. Adding gold nanoparticles and tuning shell thickness enhances this hot carrier transfer for better photo-induced energy conversion.
Area of Science:
- Nanotechnology
- Materials Science
- Photochemistry
Background:
- Conventional titanium dioxide (TiO2) nanoparticles have limited light absorption.
- Plasmonic nanoparticles (PNPs) offer efficient photon conversion across a broader spectrum via localized surface plasmon resonance (LSPR).
- Integrating PNPs with metal oxide semiconductors like TiO2 can enhance their applications.
Purpose of the Study:
- To investigate the photophysics of plasmonic nanoparticle-shell systems (AgNWs@TiO2).
- To explore the role of additional gold nanoparticles (AuNPs) in enhancing energy transfer.
- To determine the effect of TiO2 shell thickness on carrier dynamics.
Main Methods:
- Transient absorption measurements to study photophysics.
- Steady extinction simulations for analysis.
- Photobleaching decay dynamics to determine carrier lifetimes.
Main Results:
- Plasmonic energy transfer from AgNWs core to TiO2 shell occurs via hot carrier injection.
- Gold nanoparticles (AuNPs) in AgNWs@TiO2@AuNPs systems enhance hot carrier transfer through plasmonic coupling.
- TiO2 shell thickness significantly influences carrier dynamics.
Conclusions:
- Plasmonic core-shell nanostructures enable efficient photo-induced energy conversion.
- Hot carrier transfer is a key mechanism in these systems.
- Designing nanostructures with tunable shell thickness and plasmonic coupling is crucial for optimizing energy conversion applications.
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