Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots
(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.
(Less)
- author
- Chen, Junsheng LU ; Zidek, Karel LU ; Abdellah, Mohamed LU ; Al-Marri, Mohammed J. ; Zheng, Kaibo LU and Pullerits, Tõnu LU
- organization
- publishing date
- 2016-05-11
- 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
- article number
- 254001
- publisher
- IOP Publishing
- external identifiers
-
- pmid:27167726
- wos:000376693100002
- scopus:84969704198
- 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
- 2025-01-12 20:30:49
@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>}},
author = {{Chen, Junsheng and Zidek, Karel and Abdellah, Mohamed and Al-Marri, Mohammed J. and Zheng, Kaibo and Pullerits, Tõnu}},
issn = {{0953-8984}},
keywords = {{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}},
doi = {{10.1088/0953-8984/28/25/254001}},
volume = {{28}},
year = {{2016}},
}