Modulated photoluminescence of graphene quantum dots in the vicinity of an individual silver nano-octahedron

Wenshuo Wang, Dawei He*, Jiahua Duan, Ming Fu, Xiqing Zhang, Hongpeng Wu, Yin Hu, Yongsheng Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We propose an effective strategy to enhance and modulate the photoluminescence (PL) of graphene quantum dots (GQDs) in the vicinity of a single silver nano-octahedron (SNO) utilizing three-dimensional finite-difference time-domain calculations. The SNO is designed to act as a multifrequency plasmonic antenna with multiple plasmon resonance modes covering multiple emission peaks of GQDs. The spectral modifications of spontaneous emission are investigated with the variations of the GQD's position and dipole moment orientation relative to the SNO. The PL colour of the GQD can be precisely adjusted between blue and green through the strong interaction with the designed antenna. The multicolour features of GQDs will also facilitate their potential applications as eco-friendly and multifunctional optical probes. The study contributes to a deeper understanding of the PL properties of GQDs near the metallic nanoparticles.

Original languageEnglish
Pages (from-to)4504-4509
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number10
DOIs
Publication statusPublished - 14 Mar 2014
Externally publishedYes

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