Synthesis, characterization and non-linear optical response of organophilic carbon dots

Bourlinos, Athanasios B.; Karakassides, Michael A.; Kouloumpis, Αntonios; Gournis, Dimitrios; Bakandritsos, Aristides; Papagiannouli, Irène; Aloukos, Panagiotis; Couris, Stelios; Holá, Kateřina; Zbořil, Radek; Krysmann, Marta J.; Giannelis, Emmanuel P.

doi:10.1016/j.carbon.2013.05.017

Cited by 69 publications

(43 citation statements)

References 13 publications

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“…Tian et al [90] firstly reported the utility of 13 CNMR spectroscopy in liquid state to identify the carbon states in a C-dots sample derived from candle shoot (Figure 8). Followed by this, numerous efforts have been contributed to using NMR spectroscopy in both solid state and liquid state for C-dots characterization [21,38,56,85,109,115,135,143,[159][160][161][162][163][164]. In addition, NMR has been proved to be powerful in the establishment of the 8 Journal of Nanomaterials chemical alterations that happened to the surface modifiers during carbonization.…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

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: Nuclear Magnetic Resonancementioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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“…6(d) ] reveals characteristic absorption peaks due to the octadecyl chains tethered to the surface along with a strong peak at 1700 cm −1 suggestive of amide linkages. 49 Similarly, water dispersible C-dots were prepared by controlled pyrolysis of dopamine, 54 lauryl gallate, 55 polyethylenimine, 56 or a mixture of ethanolamine and citric acid. 57 , 58 In a remarkably time-effi cient modifi cation of the method, microwave-assisted thermal treatment of an aqueous solution containing PEG 48 or a mixture of PEG and a saccharide 59 leads rapidly to selfpassivated colloidal aC-dots.…”

Section: In Situ Formation Of Functional Groupsmentioning

confidence: 99%

From highly graphitic to amorphous carbon dots: A critical review

Kelarakis

2014

MRS Energy & Sustainability

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Graphitic and amorphous C-dots share common characteristics in their photoluminescence behavior. However, the graphitic dots have a lead as electrocatalyst for fuel cells, sensitizers, and electron acceptors for solar cells.The emergence of carbogenic nanoparticles (C-dots) as a new class of photoluminescent (PL) nanoemitters is directly related to their economical preparation, nontoxic nature, versatility, and tunability. C-dots are typically prepared by pyrolytic or oxidative treatment of suitable precursors.While the surface functionalities critically affect the dispersibility and the emission intensity of C-dots in a given environment, it is the nature of the carbogenic core that actually imparts certain intrinsic properties. Depending on the synthetic approach and the starting materials, the structure of the carbogenic core can vary from highly graphitic all the way to completely amorphous. This critical review focuses on correlating the functions of C-dots with the graphitic or amorphous nature of their carbogenic cores. The systematic classifi cation on that basis can provide insights on the origins of their intriguing photophysical behavior and can contribute in realizing their full potential in challenging applications.Keywords : luminescence ; nanostructure ; carbonization REVIEW DISCUSSION POINT ▪ C-dots set an example that low-cost, non-toxic materials can effectively supplant highly engineered, yet toxic compounds in challenging applications.

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“…Till now, C-dots can be synthesized by a few of synthesis approaches [15,16]. Among them, pyrolysis method is an easy thermal oxidation method to directly produce functionalized C-dots [17,18]. The C-dots sensitized TiO 2 can effectively extent the visible light absorption and improve the visible light photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%