Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots

Junsheng Chen, Karel Žï¿½dek, Mohamed Abdellah, Jaber Al Marri, Kaibo Zheng, T�nu Pullerits

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In a composite film of Cdx Sey Zn1-x S1-y gradient core-shell quantum dots (QDs) and gold nanorods (NRs), the optical properties of the QDs are drastically affected by the plasmonic nanoparticles. We provide a careful study of the two-step formation of the film and its morphology. Subsequently we focus on QD luminescence photoactivation - a process induced by photochemical changes on the QD surface. We observe that even a sparse coverage of AuNRs can completely inhibit the photoactivation of the QDs' emission in the film. We demonstrate that the inhibition can be accounted for by a rapid energy transfer between QDs and AuNRs. Finally, we propose that the behavior of emission photoactivation can be used as a signature to distinguish between energy and electron transfer in the QD-based materials.

Original languageEnglish
Article number254001
JournalJournal of Physics Condensed Matter
Volume28
Issue number25
DOIs
Publication statusPublished - 11 May 2016
Externally publishedYes

Fingerprint

Quantum Dots
Luminescence
Semiconductor quantum dots
Photoluminescence
Chemical activation
quantum dots
activation
photoluminescence
Energy Transfer
Photochemical Processes
energy transfer
Nanotubes
Composite films
Nanorods
Gold
Nanoparticles
Energy transfer
nanorods
electron transfer
Optical properties

Keywords

  • energy transfer
  • gold nanorods
  • photoactivation
  • quantum dots
  • surface plasmon

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots. / Chen, Junsheng; Žï¿½dek, Karel; Abdellah, Mohamed; Al Marri, Jaber; Zheng, Kaibo; Pullerits, T�nu.

In: Journal of Physics Condensed Matter, Vol. 28, No. 25, 254001, 11.05.2016.

Research output: Contribution to journalArticle

Chen, Junsheng ; Žï¿½dek, Karel ; Abdellah, Mohamed ; Al Marri, Jaber ; Zheng, Kaibo ; Pullerits, T�nu. / Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots. In: Journal of Physics Condensed Matter. 2016 ; Vol. 28, No. 25.
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