Photostability of the Oleic Acid-Encapsulated Water-Soluble CdxSeyZn1-xS1-y Gradient Core-Shell Quantum Dots
(2017) In ACS Omega 2(5). p.1922-1929- Abstract
Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention - both for their potential in applications and for studies of fundamental processes. However, high-quality QDs are typically prepared in organic solvents, and the transfer of QDs to an aqueous phase is needed to create the desired QD composites. Photostability of the transferred QDs - both the steady-state and photo-induced dynamic properties - is essential for studying the processes in the composites and for their applications. We present a detailed study of the photostability of aqueous CdxSeyZn1-xS1-y gradient core-shell QDs obtained by... (More)
Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention - both for their potential in applications and for studies of fundamental processes. However, high-quality QDs are typically prepared in organic solvents, and the transfer of QDs to an aqueous phase is needed to create the desired QD composites. Photostability of the transferred QDs - both the steady-state and photo-induced dynamic properties - is essential for studying the processes in the composites and for their applications. We present a detailed study of the photostability of aqueous CdxSeyZn1-xS1-y gradient core-shell QDs obtained by various approaches using linker exchange and surfactant encapsulation. Beside the steady-state photoluminescence (PL) emission stability, we also study changes in the PL decay. From the variety of the studied samples, the water-soluble QDs encapsulated by a double layer of oleic acid show superior properties, that is, stable PL emission and PL decay under continuous light or pulsed-laser light irradiation. We demonstrate that the double-layer encapsulation of QDs can be used to create QDs-metal nanoparticle composites.
(Less)
- author
- Chen, Junsheng LU ; Yang, B ; Li, Chuanshuai LU ; Zheng, Kaibo LU ; Zidek, Karel LU and Pullerits, Tonu LU
- organization
- publishing date
- 2017-05-31
- type
- Contribution to journal
- publication status
- published
- subject
- in
- ACS Omega
- volume
- 2
- issue
- 5
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000404727800021
- scopus:85028960419
- ISSN
- 2470-1343
- DOI
- 10.1021/acsomega.7b00316
- language
- English
- LU publication?
- yes
- id
- 35048eef-de42-4237-a818-d8997e36962a
- date added to LUP
- 2017-09-27 13:08:46
- date last changed
- 2024-09-16 09:06:53
@article{35048eef-de42-4237-a818-d8997e36962a, abstract = {{<p>Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention - both for their potential in applications and for studies of fundamental processes. However, high-quality QDs are typically prepared in organic solvents, and the transfer of QDs to an aqueous phase is needed to create the desired QD composites. Photostability of the transferred QDs - both the steady-state and photo-induced dynamic properties - is essential for studying the processes in the composites and for their applications. We present a detailed study of the photostability of aqueous Cd<sub>x</sub>Se<sub>y</sub>Zn<sub>1-x</sub>S<sub>1-y</sub> gradient core-shell QDs obtained by various approaches using linker exchange and surfactant encapsulation. Beside the steady-state photoluminescence (PL) emission stability, we also study changes in the PL decay. From the variety of the studied samples, the water-soluble QDs encapsulated by a double layer of oleic acid show superior properties, that is, stable PL emission and PL decay under continuous light or pulsed-laser light irradiation. We demonstrate that the double-layer encapsulation of QDs can be used to create QDs-metal nanoparticle composites.</p>}}, author = {{Chen, Junsheng and Yang, B and Li, Chuanshuai and Zheng, Kaibo and Zidek, Karel and Pullerits, Tonu}}, issn = {{2470-1343}}, language = {{eng}}, month = {{05}}, number = {{5}}, pages = {{1922--1929}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Omega}}, title = {{Photostability of the Oleic Acid-Encapsulated Water-Soluble Cd<sub>x</sub>Se<sub>y</sub>Zn<sub>1-x</sub>S<sub>1-y</sub> Gradient Core-Shell Quantum Dots}}, url = {{http://dx.doi.org/10.1021/acsomega.7b00316}}, doi = {{10.1021/acsomega.7b00316}}, volume = {{2}}, year = {{2017}}, }