Superficial preparation of biocompatible carbon quantum dots for antimicrobial applications

Lakshmanan, A.; Surendran, P.K.; Manivannan, Nadarajah; Sathish, Manda; Balalakshmi, Chinnasamy; Suganthy, Natarajan; Rameshkumar, Perumal; Kaviyarasu, K.; Ramalingam, G.

doi:10.1016/j.matpr.2020.02.694

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…The band gap of gCDs was found to be 3.34 and 3.30 eV for RCDs and APCDs, respectively. These values are consistent with those in works already published [ 33 , 34 , 35 , 36 ]. The meaning of these data concerning the reactivity of the gCDs [ 37 ] in the context of the present paper has been discussed in detail in the Supplementary Information .…”

Section: Resultssupporting

confidence: 93%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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The deterioration of oil-based products during processing, distribution and storage has a major negative impact on the industry from an economic point of view. The spoilage of oil is mainly due to its oxidation which can be triggered by various factors, such as UV light, heating or the presence of impurities that result in the formation of radical species. In this context, several packaging alternatives have recently been developed with the aim to protect and extend the shelf life of oil-based products. This work aimed to study the antioxidant properties of bio-polymer-based films (BPFs) obtained from high methoxylated pectin (HMP) and sodium caseinate (CAS) and enriched with different concentrations of green carbon dots (gCDs), 0.25%, 0.50 and 1% w/w, obtained from apple pomace (APCDs) and rosemary powder (RCDs). The resulting films (gCDs-BPFs) have shown that the presence of gCDs not only modified the surface roughness of the films, but also positively affected their antioxidant properties. The addition of gCDs enhanced the radical inhibiting capacity of the raw BPFs by 42 and 62% for the films containing 1% RCDs and 1% APCDs, respectively. As a proof of the concept, two oil samples (edible and cosmetic) were treated with the obtained antioxidant films, and the results demonstrated that in both types of samples the oxidation process was minimized during the five days of the experiment. These results are promising and suggest that the antioxidant bio-polymer-based films could be excellent candidates for further production of active packaging.

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Section: Resultssupporting

confidence: 93%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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“…The large π-conjugated carbon quantum dot system easily attached through electron transfer to the bacterial cell wall. , The antibacterial mechanism of the CQDs has been widely speculated, as per the literature, to be based on electrostatic interactions, ROS, or light irradiation. ROS generation has essentially important antibacterial activity. − The hydroxyl radicals and nitrogen groups are confirmed from FTIR and XPS studies. CQDs include nitrogen elements that possess positive charges that link them with negatively charged microbes, and CQDs penetrate into the cell membrane and ultimately result in the death of microorganisms.…”

Section: Resultsmentioning

confidence: 88%

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

et al. 2020

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In this work, the green synthesis of highly fluorescent carbon quantum dots (CQDs) with an efficient quantum yield of 17.98% using sugarcane bagasse pulp as the precursor was conducted by a hydrothermal technique. The high-resolution transmission electron microscopy analysis revealed that the CQDs were competently monodispersed with the particle size ranging between 0.75 and 2.75 nm. The structural properties of CQDs were investigated using X-ray diffraction, Fourier transform infrared, and X-ray photoelectron spectroscopy analyses. The UV–visible spectrum showed two absorption peaks due to the aromatic CC transitions of π–π* and CO transitions of n−π*. The fluorescence spectrum of CQDs displayed a strong blue emission. However, the first-ever of its kind, sugarcane industrial solid waste carbon quantum dots caused significant orders to obey the enhancement of the third-order nonlinearity (χ(3)) when compared with other carbon dots (CDs). The calculated nonlinear optical (NLO) parameters such as n 2, β, and χ(3) were 1.012 × 10–8 cm2/W, 2.513 × 10–4, and 3.939 × 10–7 esu, respectively. The figures of merit were evaluated to be W = 6.6661 and T = 0.0132, which greatly fulfilled the optical switching conditions. Besides, the antibacterial activities of CQDs were screened against aquatic Gram-positive (Benthesicymus cereus and Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa, Vibrio cholerae, and Escherichia coli) microbial organisms. Our findings, however, indicate that synergistic sugarcane industrial waste CQDs are promising materials for the functioning of NLO devices, bioimaging, and pharmaceutical applications.

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“…Through the hydrothermal process Lakshmanan et al have synthesized C-Dots using the orange waste peel to develop it as an antibacterial agent (Lakshmanan et al, 2021). The antibacterial test from C-Dots was tested on both Gram-negative bacteria such as Vibrio cholera, Pseudomonas eruginosa and Escherichia coli and Gram-positive bacteria consisted of Staphylococcus aureus and Bacillus cereus by disc diffusion scheme.…”

Section: Biocide or Antimicrobial Agentmentioning

confidence: 99%

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

et al. 2021

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Carbon-Dots (C-Dots) have drawn much attention in recent years owing to their remarkable properties such as high biocompatibility, low toxicity, nano-scale size, and ease of modification with good tuneable photoluminescence performance. These unique properties have led C-Dots to become a promising platform for bioimaging, metal ion sensing and an antibacterial agent. C-Dots can be prepared using the top-down and bottom-up approaches, in which the latter method is commonly used for large scale and low-cost synthesis. C-Dots can be synthesized using sustainable raw materials or green biomass since it is environmentally friendly, in-expensive and most importantly, promotes the minimization of waste production. However, using biomass waste to produce high-quality C-Dots is still a matter of concern waiting for resolution, and this will be the main focus of this review. Fundamental understanding of C-Dots such as structure analysis, physical and chemical properties of C-Dots, various synthesis methodology and type of raw materials used are also discussed and correlated comprehensively. Additionally, factors affecting the bandgap of the C-Dots and the strategies to overcome these shortcomings are also covered. Moreover, formation mechanism of C-Dots focusing on the hydrothermal method, option and challenges to scale up the C-Dots production are explored. It is expected that the great potential of producing C-Dots from agricultural waste a key benefit in view of their versatility in a wide range of applications.

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Superficial preparation of biocompatible carbon quantum dots for antimicrobial applications

Cited by 7 publications

References 20 publications

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

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