Mechanism to Detect Pesticide Residues in Tealeaves Based on CdZnSe/ZnS Ternary Alloy Quantum Dots

Nguyen Ngọc Hai, Nguyen Hai Yen, Duong Thi Giang, Dinh Hung Cuong, Nguyen Duc Nhat, Pham Thu Nga, Dao Tran Cao
Author affiliations

Authors

  • Nguyen Ngọc Hai Institute of Materials Science, Vietnam Academy of Science and Technology
  • Nguyen Hai Yen Institute of Materials Science, Vietnam Academy of Science and Technology
  • Duong Thi Giang Institute of Materials Science, Vietnam Academy of Science and Technology
  • Dinh Hung Cuong Institute of Materials Science, Vietnam Academy of Science and Technology
  • Nguyen Duc Nhat Institute of Materials Science, Vietnam Academy of Science and Technology
  • Pham Thu Nga Institute of Materials Science, Vietnam Academy of Science and Technology
  • Dao Tran Cao Institute of Materials Science, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.15625/0868-3166/25/1/5601

Abstract

In this report, we present the optical properties of the biosensors fabricated from CdZnSe/ZnS quantum dots. The optical properties such as absorption and emission of the ternary quantum dots before and after coupling with the protein molecules like streptavidine (SA) and acetylcholinesterase enzymes (AChE), to form a biosensor structure, will be presented. In particular, the changes in luminescence intensity according to the pH value of the solution environment containing biosensor have been considered, before and after the presence of pesticides. The changes in luminescence intensity of the biosensor after the presence of pesticide over time from 2 seconds to 26 minutes were also surveyed. We have been carried out the tests to determine the trace amounts of commercial pesticides like Motox 5EC, containing 5% cypermethrin and Tungatin 10 EC, containing 10% abamectin, on the real samples of tealeaves. Some characteristics of the relationship between composition, structure, and special optical properties of ternary alloy quantum dots will also be presented. These studies open up the potential applications of  ternary quantum dots for agricultural production.

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Published

15-05-2015

How to Cite

[1]
N. N. Hai, N. H. Yen, D. T. Giang, D. H. Cuong, N. D. Nhat, P. T. Nga and D. T. Cao, Mechanism to Detect Pesticide Residues in Tealeaves Based on CdZnSe/ZnS Ternary Alloy Quantum Dots, Comm. Phys. 25 (2015) 67. DOI: https://doi.org/10.15625/0868-3166/25/1/5601.

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Vol. 25 No. 1 (2015)

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Papers

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Received 01-12-2014
Accepted 17-04-2015
Published 15-05-2015

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