Effects of Zn (II) on the Optical Properties of CdTe Quantum Dots and Their Photoluminescence Response to Lead Ion
| Autor: | Hoang Quang Bac, Mai Xuan Dung, Vu Anh Duc, Nguyen Thi Nhan |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | VNU Journal of Science: Natural Sciences and Technology. |
| ISSN: | 2588-1140 2615-9317 |
| DOI: | 10.25073/2588-1140/vnunst.5286 |
| Popis: | Water-soluble CdTe quantum dots (QDs) have been utilized as photoluminescence probes for the detection of metal ions such as Pb2+, Hg2+, Cd2+, etc. We initially developed highly photoluminescence (PL) Zn-doped CdTe for toxic ions detection. A study on the changes of optical properties of Zn-doped CdTe and CdTe QDs when exposed to Pb2+ suggested that Pb2+ could act as a surface passivating agent to reduce Te2- dangling bonds while Zn2+ dopant stabilizes the QDs surface against ambient oxidation. The results demonstrated herein provide useful understandings of the interactions between water-soluble QDs and metal ions. These results suggest further applications of QDs in sensing metal ions. |
| Databáze: | OpenAIRE |
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