Synthesis and Properties of Water-Soluble Blue-Emitting Mn-Alloyed CdTe Quantum Dots

In this work, we prepared CdTe quantum dots, and series of Cd(1-x)Mn(x)Te-alloyed quantum dots with narrow size distribution by an ion-exchange reaction in water solution. We found that the photoluminescence peaks are shifted to higher energies with the increasing Mn(2+) content. So far, this is the...

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Detalles Bibliográficos
Autores principales: Tynkevych, Olena, Karavan, Volodymyr, Vorona, Igor, Filonenko, Svitlana, Khalavka, Yuriy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2018
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5931944/
https://www.ncbi.nlm.nih.gov/pubmed/29721641
http://dx.doi.org/10.1186/s11671-018-2529-y
Descripción
Sumario:In this work, we prepared CdTe quantum dots, and series of Cd(1-x)Mn(x)Te-alloyed quantum dots with narrow size distribution by an ion-exchange reaction in water solution. We found that the photoluminescence peaks are shifted to higher energies with the increasing Mn(2+) content. So far, this is the first report of blue-emitting CdTe-based quantum dots. By means of cyclic voltammetry, we detected features of electrochemical activity of manganese energy levels formed inside the Cd(1-x)Mn(x)Te-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd(1-x)Mn(x)Te-alloyed quantum dots which confirmed the successful ion-exchange reaction. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s11671-018-2529-y) contains supplementary material, which is available to authorized users.

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