Co-enhancement of fluorescence and singlet oxygen generation by silica-coated gold nanorods core-shell nanoparticle

Xuebin Ke, Dong Wang, Changqing Chen, Anqi Yang, Yu Han, Lei Ren*, Donghui Li, Hong Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Metal-enhanced fluorescence (MEF) as a newly recognized technology has been attracting considerable attention and is widely used in fluorescence-based technology. In this paper, we reported a novel distance-dependent MEF and metal-enhanced singlet oxygen generation phenomenon based on silica-coated gold nanorods (AuNRs@SiO2) core-shell structure with tetra-substituted carboxyl aluminum phthalocyanine (AlC4Pc) that serve as both fluorophore and photosensitizer. When the AlC4Pc was linked on the surface of AuNRs@SiO2, the fluorescence intensity and singlet oxygen productivity varied with the thickness difference of silica shell from 2.1 to 28.6 nm. The co-enhancement effect reached the maximum of 7-fold and 2.1-fold, respectively, when the separation distance was 10.6 nm. These unique characteristics make the prepared core-shell nanoparticles promising for MEF-based biological imaging and photodynamics therapy.

Original languageEnglish (US)
JournalNanoscale Research Letters
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2014

Keywords

  • Metal-enhanced fluorescence
  • Metal-enhanced singlet oxygen generation
  • Silica-coated gold nanorods
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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