Nanomeghyas

Nanomeghyas

Optical properties, Quantum Dots, Gamma irradiation, Dosimetry, CdS, CQD

Authors
E. Assar 1
H. Alehdaghi 1
B. Azadegan 1
A. A. Mowlavi 1
J . Baedi 1
B. Maleki 2
1 Department of Physics, School of Scinces, University of Hakim Sabzevari, Sabzevar
2 Department of Chemistry, School of Scinces, University of Hakim Sabzevari, Sabzevar
Abstract
Herein, the optical properties of CdS and Carbon quantum dots QDs for the first time under gamma irradiation was studied. The CdS QDs were synthesized by a rapid, facile and low cost microwave assisted method and carbon QDs extracted from orange juice by hydrothermal method. The samples were exposure by gamma ray with source of Co-60 within 0-20 kGy. The results showed that gamma irradiation suppress the photoluminescence PL intensity of QDs. A linear relation between PL intensity and logarithmic dose of gamma was found for the matrixed CdS QDs deposited top of glass. The initial size of CdS QDs was indicated about 3.4 nm by transmission electron microscopy TEM. For water-soluble CdS QDs and powdered carbon QDS, PL intensity was decreased as dose of 20 kGy gamma irradiation. These results shows that the luminescent nanostructure can be a new candidate for dosimetry.
Keywords
Optical properties
Quantum Dots
Gamma irradiation
Dosimetry
CdS
CQD
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  • Receive Date 28 October 2020