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Plasmon-driven synthesis of individual metal@semiconductor core@shell nanoparticles
Rifat Kamarudheen1,2, Gayatri Kumari1,2, Andrea Baldi3,4,5
1DIFFER - Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ, Eindhoven, The Netherlands.
Nature Communications
|August 10, 2020
Summary
Localized plasmonic heating enables precise control over nanoscale temperature gradients for synthesizing advanced core@shell nanomaterials. This method allows for the controlled growth of functional nanostructures with potential applications in catalysis and photonic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Accurate temperature control is crucial for advanced material synthesis.
- Plasmon resonances in metal nanoparticles create localized temperature gradients.
- Ensemble plasmonic experiments often suffer from collective heating, obscuring local effects.
Purpose of the Study:
- To demonstrate localized plasmonic photothermal effects for controlled nanomaterial synthesis.
- To create spatially confined nanoreactors for activating and controlling nanoparticle growth.
- To spectroscopically follow the growth of individual metal@semiconductor core@shell nanoparticles.
Main Methods:
- Utilizing localized plasmonic photothermal effects.
- Tailoring illumination geometry and chemical environment.
- Spectroscopic monitoring via inelastic light scattering.
Main Results:
- Demonstrated conformal growth of CeO2, ZnO, and ZnS shells around plasmonic nanoparticles.
- Showed shell growth rate scales with nanoparticle temperature.
- Successfully synthesized individual metal@semiconductor core@shell nanoparticles.
Conclusions:
- Localized plasmonic photothermal effects can generate nanoreactors for controlled synthesis.
- This approach enables the creation of functional nanomaterials inaccessible by classical methods.
- Potential applications include nanolithography, catalysis, energy conversion, and photonic devices.
