Easy synthesis, characterization and cell cytotoxicity of green nano carbon dots using hydrothermal carbonization of Gum Tragacanth and chitosan bio-polymers for bioimaging

Moradi, Sajad; Sadrjavadi, Komail; Farhadian, Negin; Hosseinzadeh, Leila; Shahlaei, Mohsen

doi:10.1016/j.molliq.2018.03.054

Cited by 87 publications

(17 citation statements)

References 38 publications

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“…Picea and Molinia caerulea show the same behavior, a characteristic slight absorption signal at 244 nm, while Elaeis guineensis shows a slight absorption signal at 244 nm and a more visible signal at 280 nm. Absorption signals between 240 nm and 290 nm are attributed to the π-π* or n-π* transitions and suggest the presence of C=O, C=C, and C=N surface functional groups [103]. On the other hand, the signal at 244 nm could be attributed precisely to n-π* transitions and could explain the slightly blue shift in the fluorescence spectra of Picea and Molinia caerulea when they are exciting with longer wavelengths [16,104].…”

Section: Optical Propertiesmentioning

confidence: 97%

Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm

et al. 2021

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Biochar-derived C-Dots from Picea, Molinia caerulea and Elaeis guineensis were synthesized through a hydrothermal process, and their physicochemical and optical characteristics and environmental effects were compared. These C-Dots were characterized by techniques such as Attenuated Total Reflection–Fourier Transform Infrared (ATR-FTIR), UV-Vis spectrophotometry, fluorescence spectroscopy, dynamic light scattering (DLS), Z potential, and High-Resolution Transmission Electronical Microscopy (HR-TEM). The ecotoxicity tests were performed using the Microtox™ test, making this study one of the few that use this method. The C-Dots from Molinia caerulea showed the best quantum yield (QY) of 8.39% and moderate ecotoxicity, while Elaeis guineensis has the lowest QY (2.31%) but with zero toxicity. Furthermore, the C-Dots from Picea presents good optical properties but showed high toxicity and limits its use. Finally, all C-Dots showed functional groups that could be biofunctionalized with biomolecules, especially C-Dots from Molinia caerulea and Elaeis guineensis show potential for use in the development of optical biosensors.

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Section: Optical Propertiesmentioning

confidence: 97%

Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm

et al. 2021

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“…This also means that the ion exchanging or electrons sharing had been occurred between adsorbate and the binding sites on the M-MWCNTs [24,28]. Chemisorption process is typically limited to one layer of molecules on the surface of the adsorbent commonly followed by added layers of the physically adsorbed molecules of the adsorbate [46,47].…”

Section: Effect Of Contact Time and Kinetic Modelingmentioning

confidence: 99%

Atenolol adsorption onto multi-walled carbon nanotubes modified by NaOCl and ultrasonic treatment; kinetic, isotherm, thermodynamic, and artificial neural network modeling

Dehdashti

Amin

Gholizadeh

et al. 2019

J Environ Health Sci Engineer

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The removal of pharmaceutical pollutants from the aqueous environment is a great environmental concern, mainly due to their diversity, high consumption, and sustainability. In the current study, we aimed to investigate the ability of multi-walled carbon nanotubes (MWCNTs) modified by sodium hypochlorite (NaOCl) and ultrasonic treatment in refining wastewaters contaminated with Atenolol β-blocker drug (ATN). The physical and structural characteristics of the raw MWCNTs and modified MWCNTs (M-MWCNTs) were analyzed using SEM, TEM, Raman spectroscopy, TGA, and FT-IR techniques. The effects of different parameters, including pH, initial concentration, contact time, and temperature were studied and optimized. Subsequently, the adsorption data were analyzed by several kinetic and equilibrium isotherm equations and modeled by artificial neural network (ANN). Highest ATN removal (87.89%) ((q e,exp = 46.03 mg g −1)) occurred on the adsorbent activated within 10 s of ultrasonication time and NaOCl 30%. Moreover, adsorbent modification significantly improved the ATN removal, so that the removal rate on the raw MWCNTs was about 58%, but in the same conditions, M-MWCNTs removed more than 92% of the adsorbate. The adsorption process reached equilibrium after 90 min under the optimized pH of 6. According to ANN modeling, approximately the whole values dispersed around the 45°line, indicating a good compatibility between the trial results and ANNpredicted data. The modification of MWCNTs in proper ultrasonic power via appropriate concentration of NaOCl solution removed many of the impurities and significantly improved the adsorption performance of MWCNTs.

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“…This fluorescence intensity of HCT-116 cells incubated with NCDs remained stable over a period of 24 h. Since NCDs show multicolor emission compared to any other labeling agent, it helps to choose in wider wavelength for observation. 52 Moreover, it is also obvious from the overlay (merge) images that fluorescent signals are distributed in the whole cells because the NCDs are efficiently internalized into the cells, 53 whereas the fluorescence confocal microscopy images of HCT-116 cells alone (control) did not show any fluorescence under the excitation wavelengths of 405, 488, and 555 nm. The morphologies of the HCT-116 cells are unchanged before (control) and after incubation with the NCDs, further confirming their good biocompatibility.…”

Section: Acs Omegamentioning

confidence: 99%

Indian Gooseberry-Derived Tunable Fluorescent Carbon Dots as a Promise for In Vitro/In Vivo Multicolor Bioimaging and Fluorescent Ink

et al. 2018

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We report the synthesis of eco-friendly fluorescent nitrogen-doped carbon dots (NCDs) using the renewable resource of Phyllanthus emblica juice as a precursor by the hydrothermal process at 200 °C for 12 h. The synthesized NCDs emitted bright fluorescence without any pretreatment of the sample under the excitation of UV light and exhibited excitation-dependent fluorescence emission. The NCDs have nitrogen-containing and oxygen-containing functional groups such as amino, hydroxyl, and carboxyl on the surface of the carbon structure. Furthermore, the NCDs exhibited excellent water dispersibility with prolonging stability and good biocompatibility. On the basis of the good optical properties, the NCDs have potentially been used as a promising staining agent on HCT-116 human colon cancer cells and Caenorhabditis elegans (nematodes) for multicolor cellular imaging. In the cell cytoplasm, the NCDs showed rapid uptake and high cytocompatibility on cellular morphology with bright fluorescence emission. Furthermore, the NCDs were used as fluorescent ink for writing and drawing with anticoagulation. In addition, the NCDs were significantly utilized as a fluorescent ink for thumb impression, which glows instantly under the illumination of UV light and does not require a secondary treatment. Hence, the synthesized NCDs can be used as ideal multicolor fluorescent probes for bioimaging applications and as fluorescent ink instead of traditional fluorescent ink.

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Easy synthesis, characterization and cell cytotoxicity of green nano carbon dots using hydrothermal carbonization of Gum Tragacanth and chitosan bio-polymers for bioimaging

Cited by 87 publications

References 38 publications

Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm

Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm

Atenolol adsorption onto multi-walled carbon nanotubes modified by NaOCl and ultrasonic treatment; kinetic, isotherm, thermodynamic, and artificial neural network modeling

Indian Gooseberry-Derived Tunable Fluorescent Carbon Dots as a Promise for In Vitro/In Vivo Multicolor Bioimaging and Fluorescent Ink

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