Luminescent Surface Quaternized Carbon Dots

Bourlinos, Athanasios B.; Zbořil, Radek; Petr, Jan; Bakandritsos, Aristides; Krysmann, Marta J.; Giannelis, Emmanuel P.

doi:10.1021/cm2026637

Cited by 175 publications

(133 citation statements)

References 16 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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“…However, more surface-passivated CDs synthesized by "bottom-up" methods were obtained by adding directly the passivation agents into the organic precursors. For example, Gianelis's group synthesized a serial of ammonium carboxylate complexes through the acid-base combination between organic amines and organic acid [10,15,16,89,122]. During the thermal treatment, one serves as the carbon source (either the acid or the base part, dependent on their stability), the other part serves as the surface modifier.…”

Section: Surface Passivationmentioning

confidence: 99%

“…Bright and excitation-dependent PL emission was observed from those surface-passivated carbon nanoparticles, which were named as carbon dots. After that, these luminescent carbon nanoparticles of less than 10 nm in size have come to be known as carbon dots [10,11], carbon quantum dots [12,13], carbon nanodots [14], or carbogenic naodots [15,16], and have attracted increasing attention [1,2,[17][18][19][20]. In 2008, Ponomarenko et al used ultra-high-resolution electron beam lithography to cut graphene to desired sizes.…”

mentioning

confidence: 99%

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

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Carbon based dots (CDs) composed of sp 2 carbon structures and surface functional groups are a new kind of carbon nanomaterials, exhibiting unique luminescent properties due to the quantum confinement and edge effects. This chapter introduces CDs in detail from their synthetic strategies, morphological and structural characteristics, luminescent properties and mechanisms, and sensing applications. The synthesis methods are summarized as "top-down" and "bottomup" approaches. Luminescent properties discussed include photoluminescence, upconversion luminescence, chemiluminescence, electrochemiluminescence. Sensing applications mainly refer to the chemical and biological sensors based on the luminescent properties of CDs. This chapter provides an overview of the research field and gives future perspectives for developing the exciting materials.

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“…Infrared spectroscopy (Fig. 3b) shows the S-B had a obvious broad band at 472 cm −1 ,which can be ascribed to graphitic domains (Bourlinos et al 2012). The similar characteristic absorption bands at 3430 cm -1 , 1631 cm -1 , 1598 cm -1 , 1382 cm -1 , 1351 cm -1 , and 1105 cm -1 of the S-A and the S-B reveals a common origination from the hydroxyl group of alcohol or phenolorigin, C=O in p-substituted arylketones, C=C coupled with benzene ring, and C-O.…”

Section: Resultsmentioning

confidence: 99%

Improved Fluorescence of Carbon Dots Prepared from Bagasse under Alkaline Hydrothermal Conditions

et al. 2013

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A simple and effective route to improve the fluorescence of carbon dots is reported. A weak fluorescent solution was obtained by a diminution step to obtain tiny particles from bagasse-based carbonaceous blocks. This solution was subjected to hydrothermal treatment under alkaline conditions to improve its fluorescent performance. The luminescence was found to be improved by more than 20-fold after hydrothermal treatment. The ultraviolet absorption and the surface structure were also significantly changed. The alkaline hydrothermal process was shown to involves hydrolysis, isomerization, dehydration, and polymerization that causes the formation of the C=C double bonds and conjugated structures. The optimum hydrothermal conditions were at 200 °C for 8 h, and the most appropriate ratio of NaOH to the amount of the weak fluorescent solution was 38-40 mg to 1 mL.

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Luminescent Surface Quaternized Carbon Dots

Cited by 175 publications

References 16 publications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Improved Fluorescence of Carbon Dots Prepared from Bagasse under Alkaline Hydrothermal Conditions

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