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Updated: Apr 8, 2026
08:19
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
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Shell-thickness dependent Fano resonance in molecular catalyst functionalized CdSe/ZnS core/shell QDs
Sara T Gebre1, Luis Martinez-Gomez1, Sheng He1
1Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
The Journal of Chemical Physics
|August 26, 2025
Summary
Researchers explored how charge transfer in hybrid photocatalysts impacts Fano resonance. They found that increasing the semiconductor shell thickness reduces this interaction, affecting solar fuel applications.
Area of Science:
- Materials Science
- Photocatalysis
- Spectroscopy
Background:
- Hybrid photocatalysts combine molecular catalysts and semiconductors for solar fuel applications.
- Charge transfer at the semiconductor/molecule interface is crucial for photoinduced charge separation.
- Fano resonance can occur between molecular vibrations and semiconductor intraband absorption.
Purpose of the Study:
- Investigate the influence of charge transfer interactions on Fano resonance in hybrid photocatalysts.
- Understand how semiconductor shell thickness affects the Fano resonance in molecular-semiconductor systems.
- Elucidate the role of vibronic coupling in mediating Fano resonances.
Main Methods:
- Utilized [Re(3,3'-disulfide-2,2'-bipyridine)(CO)3Cl] (ReS2) functionalized CdSe/ZnS core/shell quantum dots (QDs) as a model system.
- Analyzed the interaction between the catalyst's CO stretching mode and the semiconductor's intraband absorption.
- Employed a theoretical model to interpret experimental findings on Fano resonance asymmetry.
Main Results:
- Observed Fano resonance between the ReS2 catalyst's CO stretch and CdSe/ZnS QD intraband absorption.
- Found that the Fano resonance asymmetry factor (q) decreases with increasing ZnS shell thickness.
- Demonstrated that reduced charge transfer interaction correlates with thicker ZnS shells.
Conclusions:
- Charge transfer interactions significantly influence Fano resonance in hybrid photocatalysts.
- Thicker ZnS shells in CdSe/ZnS QDs decrease charge transfer and electronic coupling with adsorbed catalysts.
- Findings provide insights into optimizing hybrid photocatalysts for solar fuel generation by tuning interfacial interactions.
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