A Novel Approach to the Fabrication of CdSe Quantum Dots in Aqueous Solution: Procedures for Controlling Size, Fluorescence Intensity, and Stability over Time
Joint Authors
Almendral-Parra, M. J.
Alonso-Mateos, A.
Boyero-Benito, J. F.
Sánchez-Paradinas, S.
Rodríguez-Fernández, E.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-23
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This paper report a straightforward approach for the synthesis of CdSe quantum dots (CdSe QDs) in aqueous solution.
This method, performed in homogeneous phase, affords optimal sizes and high quantum yields for each application desired.
It is an a la carte procedure for the synthesis of nanoparticles aimed at their later application.
By controlling the experimental conditions, CdSe QDs of sizes ranging between 2 and 6 nm can be obtained.
The best results were achieved in an ice-bath thermostated at 4°C, using mercaptoacetic acid as dispersant.
Under these conditions, a slow growth of quantum nanocrystals was generated and this was controlled kinetically by the hydrolysis of SeSO32- to generate Se2- in situ, one of the forming species of the nanocrystal.
The organic dispersant mercaptoacetate covalently binds to the Cd2+ ion, modifying the diffusion rate of the cation, and plays a key role in the stabilization of CdSe QDs.
In optimum conditions, when kept in their own solution CdSe QDs remain dispersed over 4 months.
The NPs obtained under optimal conditions show high fluorescence, which is a great advantage as regards their applications.
The quantum efficiency is also high, owing to the formation under certain conditions of a nanoshell of Cd(OH)2, values of 60% being reached.
American Psychological Association (APA)
Almendral-Parra, M. J.& Alonso-Mateos, A.& Boyero-Benito, J. F.& Sánchez-Paradinas, S.& Rodríguez-Fernández, E.. 2014. A Novel Approach to the Fabrication of CdSe Quantum Dots in Aqueous Solution: Procedures for Controlling Size, Fluorescence Intensity, and Stability over Time. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1041473
Modern Language Association (MLA)
Almendral-Parra, M. J.…[et al.]. A Novel Approach to the Fabrication of CdSe Quantum Dots in Aqueous Solution: Procedures for Controlling Size, Fluorescence Intensity, and Stability over Time. Journal of Nanomaterials No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1041473
American Medical Association (AMA)
Almendral-Parra, M. J.& Alonso-Mateos, A.& Boyero-Benito, J. F.& Sánchez-Paradinas, S.& Rodríguez-Fernández, E.. A Novel Approach to the Fabrication of CdSe Quantum Dots in Aqueous Solution: Procedures for Controlling Size, Fluorescence Intensity, and Stability over Time. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1041473
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041473