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

Olena Tynkevych; Volodymyr Karavan; Igor Vorona; Svitlana Filonenko; Yuriy Khalavka

doi:10.1186/s11671-018-2529-y

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

Olena Tynkevych^*, Volodymyr Karavan, Igor Vorona, Svitlana Filonenko, Yuriy Khalavka

^*Corresponding author for this work

Department of Neuroscience and Biomedical Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

148 Downloads (Pure)

Abstract

In this work, we prepared CdTe quantum dots, and series of Cd_1-xMn_xTe-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 Mn²⁺ 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-xMn_xTe-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd_1-xMn_xTe-alloyed quantum dots which confirmed the successful ion-exchange reaction.

Original language	English
Article number	132
Pages (from-to)	1-6
Journal	Nanoscale Research Letters
Volume	13
DOIs	https://doi.org/10.1186/s11671-018-2529-y
Publication status	Published - 1 Jan 2018
MoE publication type	A1 Journal article-refereed

Keywords

Alloying
Cadmium telluride
Manganese
Quantum dots
Thioglycolic acid

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10.1186/s11671-018-2529-y

s11671-018-2529-yFinal published version, 1.54 MBLicence: CC BY

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Tynkevych, O., Karavan, V., Vorona, I., Filonenko, S., & Khalavka, Y. (2018). Synthesis and Properties of Water-Soluble Blue-Emitting Mn-Alloyed CdTe Quantum Dots. Nanoscale Research Letters, 13, 1-6. [132]. https://doi.org/10.1186/s11671-018-2529-y

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abstract = "In this work, we prepared CdTe quantum dots, and series of Cd1-xMnxTe-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 Mn2+ 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 Cd1-xMnxTe-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd1-xMnxTe-alloyed quantum dots which confirmed the successful ion-exchange reaction.",

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AU - Filonenko, Svitlana

AU - Khalavka, Yuriy

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AB - In this work, we prepared CdTe quantum dots, and series of Cd1-xMnxTe-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 Mn2+ 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 Cd1-xMnxTe-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd1-xMnxTe-alloyed quantum dots which confirmed the successful ion-exchange reaction.

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