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Semiconductor quantum dots have been used in solid state lighting and biomedical applications, but these particles have a high toxicity and low biocompatibility. Carbon quantum dots have gained increasing biocompatibility and low toxicity as an alternative, while keeping fluorescence and high photostability as an alternative. The aim of this study is to ensure the synthesis of C-dote for use in fluorescence resonance energy transfer sensors, such as ion sensors, biosensors, and pH meters. The optimized C-dote converts into polymeric media for use as a solid state FRET sensor in future research.
Source link: https://doi.org/10.1149/ma2018-01/44/2537
As it related to the TEM, EDX, PL, FTIR, Raman, and ultraviolet-visible spectroscopy, the NPs obtained by the spark discharge in water looked like isolated spherical NPs with the average diameter of about 3 nm. NPs in electrical discharge are formed by two main processes, namely through the condensation of the evaporated electrode material that is atoms, ions, and small clusters with subsequent growth into the NPs, and subsequent deterioration of the electrodes as a result of the particle formation of larger particles. The colloidal solution of C NPs synthesized by spark discharge was treated by reactive non-equilibrium gas-liquid discharge plasma contacting with the solution to modify the solution's physical characteristics. Different surface chemistry activated in different solutions, according to the plasma-solution interface's results, revealed that the difference in surface chemistry activated in different solutions could have been due to different reactions induced by plasma electrons at the plasma–solution interface in comparison to the plasma–water one. Eventually, the EDL technique has been shown to be effective for the production of carbon quantum dots of sizes 2-5 nm and narrower size distribution that are part of the requirements for practical applications. Quantitative nano dots with size less than ten nm can be used in modern biotechnology as more suitable alternatives to the traditional semiconductor quantum dots due to their excellent biocompatibility, chemical stability, and size-selective photoluminescence properties.
Source link: https://doi.org/10.1149/ma2021-0123898mtgabs
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