The Influence of Carbon Quantum Dots Addition on the Photoluminescence Performance of ZnO Nanoparticles

Document Type : Article


Physics Department. Andalas University. Padang. West Sumatera. Indonesia


Extensive exploration of ZnO luminous material for biomedical applications has been conducted in recent years due to its biocompatibility and optical characteristics that can be customized to meet specific needs. The ZnO was modified with carbon dots to produce a ZnO@COD composite with enhanced photoluminescence and to obtain ZnO luminescence to be used as a bioimaging material. The hydrothermal process was adopted to produce ZnO nanoparticles. The modification of ZnO with carbon quantum dots was performed via a simple method of stirring and sonication. The effects of variations in the amount of carbon dots on the optical properties of ZnO@CQD nanocomposites were investigated. The optical properties of ZnO@CQD were characterized using UV-Vis and photoluminescence spectroscopy. The UV-Vis spectra revealed a decrease in the gap energy of ZnO@CQD. Additionally, the photoluminescence spectroscopy showed a significant increase in photoluminescence intensity with the addition of 10 ml of carbon dots. There was also a redshift of the photoluminescence band to the long-wavelength region. The optical properties of the ZnO@CQD nanocomposites discovered in this study demonstrate their potential use as bioimaging materials in biomedical applications.


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