Synthesis of Graphene Quantum Dots Decorated With Se, Eu and Ag As Photosensitizer and Study of Their Potential to Use in Photodynamic Therapy

GQDs decorated with europium (Eu), silver (Ag) and selenium (Se) at molar ratios of 0.1%, 0.3% and 0.5% were produced for the first time at different temperatures of 180 °C, 200 °C and 220 °C. Surface passivation was carried out with polyethylene glycol (PEG) to increase the intensity of photolumine...

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Bibliographic Details
Published in:Journal of fluorescence 2021-03, Vol.31 (2), p.551-557
Main Authors: Roeinfard, M., Zahedifar, M., Darroudi, M., Khorsand Zak, A., Sadeghi, E.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
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Summary:GQDs decorated with europium (Eu), silver (Ag) and selenium (Se) at molar ratios of 0.1%, 0.3% and 0.5% were produced for the first time at different temperatures of 180 °C, 200 °C and 220 °C. Surface passivation was carried out with polyethylene glycol (PEG) to increase the intensity of photoluminescence (PL) of the produced samples. The prepared quantum dots were characterized by X-Ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), transmission electron microscopy (TEM), PL and ultraviolet-visible spectroscopy. GQDs synthesized at 180 °C and decorated with Se (0.3%) had maximum PL intensity along with long lasted afterglow over 90 min compared with other samples. Excitation wavelength at 360 nm produced maximum emission at 600–900 nm and resulted in high singlet oxygen ( 1 O 2 ) generation which makes it a good candidate for photodynamic therapy applications. Graphical Abstract
ISSN:1053-0509
1573-4994
DOI:10.1007/s10895-020-02674-0