One-pot green synthesis of carbon dots by using Saccharum officinarum juice for fluorescent imaging of bacteria (Escherichia coli) and yeast (Saccharomyces cerevisiae) cells

Mehta, Vaibhavkumar N.; Jha, Sanjay Kumar; Kailasa, Suresh Kumar

doi:10.1016/j.msec.2014.01.038

Cited by 374 publications

(164 citation statements)

References 35 publications

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“…When the X-rays interacts with a crystallite C-dots sample, the constructive interference is produced, and these diffracted X-rays are then detected, processed, and counted, revealing the average structure of C-dots [86,87,89,[130][131][132][133][134][135][136]. Figure 3(A) displays a typical XRD pattern of polyethylenimine (PEI) functionalized C-dots (C-dots-PEI) derived from microwave-assisted pyrolysis of glycerol in the presence of branched PEI [86].…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…The average C-dots radius can be determined by measuring the diffusion rate of C-dots in liquids. Although there are several typical examples of using DLS for particle size determination of C-dots [24,69,120,127,136], the application of DLS for the C-dots characterization is not widely utilized. This is due to the fact that the size determination of nanoparticle in a liquid phase using DLS is not reliable since the DLS method provides only a qualitative analysis of the size distribution from the observed photon correlation function [137,138].…”

Section: Dynamic Light Scatteringmentioning

confidence: 99%

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Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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Carbon nanodots (C-dots) are recently discovered fluorescent carbon nanoparticles with typical sizes of <10 nm. The C-dots have been reported to have excellent photophysical and chemical characteristics. In recent years, the advances in the development and improvement in C-dots synthesis, characterization, and applications are burgeoning. In this review, we introduce the most commonly used techniques for the characterization of C-dots. The characterization techniques for C-dots are briefly classified, described, and illustrated with applied examples. In addition, the analytical separation methods for C-dots (including electrophoresis, chromatography, density gradient centrifugation, differential centrifugation, solvent extraction, and dialysis) are included and discussed according to their analytical characteristics. The review concludes with an outlook towards the future developments in the characterization and the analytical separation of C-dots. The comprehensive overview of the characterization and the analytical separation techniques will safeguard people to use each technique more wisely.

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Section: X-ray Diffractionmentioning

confidence: 99%

Section: Dynamic Light Scatteringmentioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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“…Due to the strongly fluorescent, color-tunable [5], readily water soluble, and nontoxic properties, immense applications from this material has boosted. Such as the fields in catalysis [6,7], bio sensing [8], theranostics [9], and bio imaging [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of fluorescent carbon dots via microwave carbonization of citric acid in presence of tetraoctylammonium ion, and their application to cellular bioimaging

et al. 2015

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A jelly-like form of carbon dots (C-dots) was prepared by microwave-assisted synthesis from citric acid in the presence of tetraoctylammonium bromide. The effect of the concentration of tetraoctylammonium bromide was examined. The synthesized carbon dots were characterized by UV-vis, XRD, FTIR, fluorescence and HR-TEM. Fluorescence extends from 350 to 600 nm, and the corresponding excitation wavelengths range from 300 to 460 nm. Quantum yields are at around 0.11. A cytotoxicity study showed carbon dots to be cell permeable and biocompatible which renders them appropriate for imaging applications. The dots were used to image HeLa cell lines via the blue fluorescence of the dots.

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“…In addition, CQD has exhibited good electronic, optical and electrical properties. 28 The synthesis of CQD was reported by laser ablation of graphite, microwave synthesis, 29 bottom up methods, 30 electrochemical oxidation of graphene oxide 31 and from natural sources like sugarcane, 32 orange peel, 33 Borassus flabellifer flowers 34 and corn. 35 But, these synthetic methods need very high temperature, extensive acid usage and could generate more chemical waste etc.…”

mentioning

confidence: 99%

Electrochemically Exfoliated Carbon Quantum Dots Modified Electrodes for Detection of Dopamine Neurotransmitter

Devi

Kumar

Sundramoorthy

2018

J. Electrochem. Soc.

113

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A simple electroanalytical method was developed to detect dopamine (DA) neurotransmitter by using carbon quantum dots (CQDs) modified electrode. To synthesis CQDs, a green electrochemical method was adopted and graphite rods were used as anode and cathodes in 0.1 M NaOH/ethanol (EtOH) as the electrolyte solution. As-synthesized CQD showed different particle sizes depending on the applied current with time as characterized by UV-visible spectroscopy. The particle size, lattice structure and functional groups of CQDs were analyzed by the HR-TEM, XRD and FT-IR, respectively. The CQD exhibited a green fluorescence under UV light (365 nm). Moreover, CQD dispersion was used to modify glassy carbon electrode (GCE) and screen-printed carbon electrode (SPCE) to study their electrochemical and electrocatalytic properties. The both GCE/CQD and SPCE/CQD showed higher electrocatalytic activity toward oxidation of dopamine (DA) in phosphate buffered saline (PBS) solution (pH = 7.4). In order to avoid interferences, Nafion (Nf) layer was coated on the CQD film modified electrode. The effect of scan rate on DA oxidation was studied from 10 to 150 mV/s. The calibration curve was recorded for DA from 1 to 7 μM using a SPCE/CQD and the limit of detection was found to be 0.099 μM. The observed electro-catalytic activity of the CQD was attributed to their negatively charged functional groups which attracted positively charged DA in 0.1 M PBS. In addition, detection of DA in spiked human urine sample was demonstrated with satisfactory recovery analysis.

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One-pot green synthesis of carbon dots by using Saccharum officinarum juice for fluorescent imaging of bacteria (Escherichia coli) and yeast (Saccharomyces cerevisiae) cells

Cited by 374 publications

References 35 publications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Synthesis of fluorescent carbon dots via microwave carbonization of citric acid in presence of tetraoctylammonium ion, and their application to cellular bioimaging

Electrochemically Exfoliated Carbon Quantum Dots Modified Electrodes for Detection of Dopamine Neurotransmitter

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