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Updated: Jun 11, 2026
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination
Published on: August 18, 2020
Plasmonic Coupling Effects in Metal Clusters Supported over TiO2: A Theoretical Study.
Parfaite Senoume Senou1, Monica Calatayud1, Ardhmeri Alija2
1Sorbonne Université, MONARIS, CNRS-UMR 8233, 4 Place Jussieu, Paris F-75005, France.
Summary
This study explores plasmonic coupling between metal nanoparticles (silver, gold, copper) and titania. Researchers identified how this interaction impacts electronic properties and visible light absorption, revealing optimal configurations.
Area of Science:
- Materials Science
- Computational Chemistry
- Surface Science
Background:
- Titania (TiO2) is a semiconductor with photocatalytic properties.
- Metal nanoparticles exhibit surface plasmon resonance, enhancing light absorption.
- Understanding metal-TiO2 interactions is crucial for photocatalysis and optoelectronics.
Purpose of the Study:
- To investigate the plasmonic coupling effects of silver, gold, and copper clusters on titania.
- To analyze how metal nanoparticle adsorption modifies the electronic properties and bandgap of TiO2.
- To quantify the contribution of surface plasmons to visible light absorption.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Time-Dependent Density Functional Theory (TDDFT) for electronic and optical properties.
- Analysis of photoabsorption spectra.
- Evaluation of plasmonic coupling strength using specialized tools.
Main Results:
- Adsorption of metal nanoparticles on rutile TiO2 leads to the disappearance of the TiO2 bandgap.
- Surface plasmons were identified, contributing significantly to visible light absorption.
- The strength of plasmonic coupling between metal nanoparticles and TiO2 was quantified.
- Favorable configurations for enhanced plasmonic coupling were identified.
Conclusions:
- Plasmonic coupling significantly alters the electronic and optical properties of TiO2.
- The study provides insights into optimizing metal-TiO2 systems for light absorption applications.
- DFT and TDDFT are effective tools for studying nanoparticle-semiconductor interactions.
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