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

Chen, Junsheng LU ; Zidek, Karel LU ; Abdellah, Mohamed LU ; Al-Marri, Mohammed J.; Zheng, Kaibo LU and Pullerits, Tõnu LU (2016) In Journal of Physics: Condensed Matter 28(25).
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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
energy transfer, gold nanorods, photoactivation, quantum dots, surface plasmon
in
Journal of Physics: Condensed Matter
volume
28
issue
25
publisher
IOP Publishing
external identifiers
  • scopus:84969704198
  • wos:000376693100002
ISSN
0953-8984
DOI
10.1088/0953-8984/28/25/254001
language
English
LU publication?
yes
id
e6b003cd-6f91-4ffd-888a-9ed0d0646f88
date added to LUP
2017-02-01 10:42:23
date last changed
2017-09-24 05:06:32
@article{e6b003cd-6f91-4ffd-888a-9ed0d0646f88,
  abstract     = {<p>In a composite film of Cd<sub>x</sub> Se<sub>y</sub> Zn<sub>1-x</sub> S<sub>1-y</sub> 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.</p>},
  articleno    = {254001},
  author       = {Chen, Junsheng and Zidek, Karel and Abdellah, Mohamed and Al-Marri, Mohammed J. and Zheng, Kaibo and Pullerits, Tõnu},
  issn         = {0953-8984},
  keyword      = {energy transfer,gold nanorods,photoactivation,quantum dots,surface plasmon},
  language     = {eng},
  month        = {05},
  number       = {25},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics: Condensed Matter},
  title        = {Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots},
  url          = {http://dx.doi.org/10.1088/0953-8984/28/25/254001},
  volume       = {28},
  year         = {2016},
}