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Carbon Quantum Dot - Astrophysics Data System

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Last Updated: 10 September 2022

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Photovoltaic performance improvement of organic solar cell with ZnO nanorod arrays as electron transport layer using carbon quantum dots-incorporated photoactive layer

To enhance organic solar cell's photovoltaic efficiency, the carbon quantum dots with spectacular optical and electrical features have been used. On ZnO seed layer-coated fluorine-doped glass substrates, ZnO nanorod arrays, serving as the electron transport layer, were produced on ZnO seed layer-coated fluorine-doped tin oxide glass substrates, serving as the electron transport layer. It was discovered that the 40 vs. percent CQDs-integrated device had the highest power conversion rate and increase of 37 percent compared to that of the device without CQDs.

Source link: https://ui.adsabs.harvard.edu/abs/2022OptMa.13212876I/abstract


Acid treatment to tune the optical properties of carbon quantum dots

Whether growth or post-treatment, the photophysical characteristics of carbon quantum dots can be altered by adding external elements to regulate photoluminescence emission wavelength and increase quantum yield. We introduce an effective method - a simple acid bath - for the production of nitrogen-doped carbon quantum dots capable of multicolor emission. The full-width half of the resulting NCQDs PL emissions's visible light region can be reduced by about 46 nm using this acid treatment. Our goal We hope that our strategy will enable the practical usage of NCQDs in a variety of optoelectronic systems in the near future.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApSS..60554690O/abstract


Green synthesis of multicolour fluorescence carbon quantum dots from sugarcane waste: Investigation of mercury (II) ion sensing, and bio-imaging applications

Natural carbon quantum dots, a new form of carbon-based nanomaterial that has sparked the curiosity of researchers for many years in biomedical applications. In this research, the eco-friendly and cost-effective hydrothermal synthesis of fluorescent CQDs using sugarcane bags as a carbon source is discussed. The synthesized CQDs are mainly monodisperious spherical in shape, with particle sizes ranging from 2 to 8 nm, according to high-resolution transmission electron microscopy findings, revealing that the synthesized CQDs are mainly monodisperge spherical in shape. It is used to produce a more cost-effective fluorescent probe for detecting Hg 2+ ions. MCF-7 cells were used to test cancer cell lines, with high bio-labeling capability and low cytotoxicity. The MCF-7 cells' cell viabilities were determined by cell vibilities. We used the synthesized CQDs as an effective fluorescent probe for multicolour live-cell imaging due to their low cytotoxicity and high biocompatibility.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApSS..60154266K/abstract


The fabrication of excitation-dependent fluorescence boron/nitrogen co-doped carbon quantum dots and their employment in bioimaging

Synthesis of carbon quantum dots with high yield and excitation-dependent fluorescence emission is of uumost importance and opens biomedical applications. We have devised a new strategy for the production of boron and nitrogen-cod CQDs by a simple yet effective hydrothermal process in this report. B/N-CQDs demonstrated low toxicity and high biocompatibility by the cell viability tests by using MRC5 and A549 cell lines with IC50 values of 981 and 583 ppm, respectively.

Source link: https://ui.adsabs.harvard.edu/abs/2022CP....56211678K/abstract


Assay of inorganic pyrophosphatase activity based on a fluorescence "turn-off" strategy using carbon quantum dots@Cu-MOF nanotubes

CQDs@Cu-MOF was decomposed by pyrophosphate ion and Cu, resulting in the release of CQDs, which caused the fluorescence to be restored. In the absence and presence of PPase from 0. 1 to 5. 1 mL -1, there was a limit of detection at 0. 03 mU mL -1, but not higher. Using the new fluorescence sensor, the PPase activity in human serum was determined, and recovery rates varied from 95. 0% to 104 percent.

Source link: https://ui.adsabs.harvard.edu/abs/2023AcSpA.28421771Z/abstract


Carbon quantum dots: An environmentally friendly and valued approach to sludge disposal

The synthesis of carbon quantum dots from sewage sludge is a more effective alternative to using the sludge's organic material. The present work intends to produce Carbon quantum dots using green chemistry principles and to use an alternative raw material inherent in sewage sludge, making its final disposal more eco friendly. Since no optical/oxidizing agent or material purification process was used, the CQDs displayed a luminescence decay time comparable to fluorescent compounds and with excellent quantum yield. The CDQs excitation tu03bmax was at 360 nm and caused a u03bmax emission at 437 nm and 430 nm, according to a photoluminescence spectroscopy report. The uptake of CQDs by the endothelial cell line EAhy 926 and their nontoxicity was shown by in vitro experiments. However, the manufacturing of CQDs may also be used for the safe disposal of sewage sludge.

Source link: https://ui.adsabs.harvard.edu/abs/2022FrCh...10.8323R/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions