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Updated: Jul 7, 2026

Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination

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Published on: August 18, 2020

Plasmonic engineering of singlet oxygen generation.

Yongxia Zhang¹, Kadir Aslan, Michael J R Previte

¹Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA.

Proceedings of the National Academy of Sciences of the United States of America

|February 7, 2008

Summary

Metallic nanoparticles boost singlet oxygen generation by photosensitizers like Rose Bengal. This metal-enhanced singlet oxygen (ME(1)O2) yield is tunable for photodynamic therapy applications.

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Published on: December 27, 2018

Area of Science:

Photochemistry
Nanotechnology
Biomedical Engineering

Background:

Singlet oxygen (1O2) is crucial for photodynamic therapy.
Photosensitizers generate 1O2 upon light excitation.
Controlling 1O2 generation is key for therapeutic efficacy.

Purpose of the Study:

To investigate metal-enhanced singlet oxygen generation (ME(1)O2).
To establish the relationship between electric field enhancement and 1O2 yield.
To demonstrate tunable 1O2 generation for clinical applications.

Main Methods:

Utilizing Rose Bengal as a photosensitizer.
Employing silver island films (SiFs) with metallic nanoparticles.
Varying nanoparticle size, shape, distance, and excitation wavelength.

Main Results:

A direct correlation between electric field enhancement and 1O2 yield was observed.
Singlet oxygen enhancement showed an inverse relationship with free space quantum yield.
Tunable 1O2 yields were achieved by modifying plasmon coupling parameters.

Conclusions:

Metal nanoparticles significantly enhance singlet oxygen generation.
ME(1)O2 is a promising strategy for optimizing photodynamic therapy.
Precise control over 1O2 yields can be achieved through nanoparticle engineering.