Effect of Cu doping on the optical property of green synthesised l-cystein-capped CdSe quantum dots

In the present study, the synthesis of water-soluble copper-doped CdSe nanoparticles (NPs) via a low cost, facile, and environmentally benign method is reported. Simple reagents such as selenium powder, cadmium chloride, and copper sulphate were used as selenium, cadmium, and copper precursor, respe...

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Bibliographic Details
Published in:Green processing and synthesis 2021-11, Vol.10 (1), p.805-810
Main Authors: Oluwafemi, Oluwatobi Samuel, Parani, Sundararajan, Lebepe, Thabang Calvin, Maluleke, Rodney
Format: Article
Language:English
Subjects:
Cadmium
Cadmium chloride
Cadmium selenides
Capping
Copper
Dopants
doping
Fourier transforms
green synthesis
Infrared spectroscopy
Labeling
Micrography
Nanocrystals
Nanoparticles
Optical properties
Photoluminescence
Photons
Quantum dots
Reagents
Selenium
Spectrum analysis
Stabilizers (agents)
Transmission electron microscopy
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Summary:In the present study, the synthesis of water-soluble copper-doped CdSe nanoparticles (NPs) via a low cost, facile, and environmentally benign method is reported. Simple reagents such as selenium powder, cadmium chloride, and copper sulphate were used as selenium, cadmium, and copper precursor, respectively, while -cysteine was used as a capping ligand without the use of an additional stabiliser. The as-synthesised copper-doped CdSe NPs were characterised using ultraviolet (UV-Vis) absorption and photoluminescence (PL) spectroscopy, Fourier-transform infrared spectroscopy, and transmission electron microscopy. By varying the dopant concentration, the temporal evolution of the optical properties and the shape of the nanocrystals were investigated. The observation and the results showed that the colour of the solution changed rapidly from orange to black, and the PL shifted to a longer wavelength at the high dopant concentration. The micrographic images revealed that the as-synthesised materials are small and could be used for bio labelling.
ISSN:2191-9550
2191-9542
2191-9550
DOI:10.1515/gps-2021-0075