Carbon Nano Onions

Echegoyen, Luís; Ortiz, Angy L.; Chaur, Manuel N.; Palkar, Amit

doi:10.1002/9780470660188.ch19

Cited by 27 publications

(22 citation statements)

References 58 publications

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“…Synthesis and characterization CNO-1:T he synthesis was performed according to ar eported procedure [26] with some modification. Briefly,2 00 mg of p-CNO was dispersed in DMF (500 mL) by sonication under N 2 for 1min at 37 kHz (100 %) and for 1hat 68 kHz (50 %).…”

Section: Experimental Section Materials and Methodsmentioning

confidence: 99%

“…One approacht oi ntroduces urfacef unctionalities on these nanomaterials involves the chemical modification of their surfaces. Among differentc arbon-based nanomaterials, multi-shell fullerenes, knowna sc arbon nano-onions, [17,26,27] are especially promising as ap latform for chemicalm odification with targeting units for biomedical studies,s ince they are small enough (average diameters of 5nm) to be transportedi nt he circulatory system with high biocompatibility andm inimals ystemic toxicity. [17] We have recently demonstrated that grafting the surfaceo fC NOs with water-soluble moieties results in:1 )low inflammation in vitro,w ith as ignificant reduction in the secretion of cytokines IL-1b,a nd 2) decrease in the recruitment of neutrophilsa nd monocytes after injection in mice.…”

Section: Introductionmentioning

confidence: 99%

“…[16] The results obtainedi nt hese toxicological studies have encouraged the investigationo ff luorescent labelled CNOs as probesf or the high resolution imaging of intracellular trafficking and studies of biodistribution in different cell lines, including MCF-7 human breastc ancer cells [26] and HeLa Kyoto cells. [29] The surface modification of CNOs stillr emains ac ritical determinant for their interactions at the biointerfaces and for active intracellular delivery.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Frasconi

Marotta

Markey

et al. 2015

Chemistry A European J

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Carbon-based nanomaterials have attracted much interest during the last decade for biomedical applications. Multimodal imaging probes based on carbon nano-onions (CNOs) have emerged as a platform for bioimaging because of their cell-penetration properties and minimal systemic toxicity. Here, we describe the covalent functionalization of CNOs with fluorescein and folic acid moieties for both imaging and targeting cancer cells. The modified CNOs display high brightness and photostability in aqueous solutions and their selective and rapid uptake in two different cancer cell lines without significant cytotoxicity was demonstrated. The localization of the functionalized CNOs in late-endosomes cell compartments was revealed by a correlative approach with confocal and transmission electron microscopy. Understanding the biological response of functionalized CNOs with the capability to target cancer cells and localize the nanoparticles in the cellular environment, will pave the way for the development of a new generation of imaging probes for future biomedical studies.

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Section: Experimental Section Materials and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Frasconi

Marotta

Markey

et al. 2015

Chemistry A European J

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“…and research of the possibilities of using them in various fields of science and technology is one of the current trends in the world for the work of research teams [9][10][11][12][13]. Technologies to obtain any ultrafine materials are laborious [14,15]. This is true for nanomaterials of carboxylic fulleroid type (singlespheroidal fullerenes and multi-spheroidal clusters-onions), and, therefore, a great interest have the areas of use in which to achieve substantial results (macro effects) quite minimal amounts of these nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Performance Characteristics of Ethanol Motor Fuels Through Use of Additives Based on Nanoscale Carbon Clusters

Haidai

Pilyavskiy

Shelud’ko

et al. 2016

EUREKA: Physics and Engineering

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A new way to overcome the disadvantages of ethanol motor fuels by introducing of multifunctional additives based on carbon nanoscale clusters in their composition is given. It is shown that the modified nanoclusters contribute to the formation of supramolecular structure of ethanol fuels in the form of solvent domains around the nanoparticles. Orientation local ordering of these supramolecular structures changes such physicochemical properties of oxygenate fuels as dielectric constant and the load-bearing capacity of the liquid phase in the dynamic mechanical load. The influence of synthetic carbon spheroidal clusters on the corrosive properties of ethanol fuels is studied. It is shown that by using small amounts (0.01 % wt.) of nanocluster-based additives in the composition of mixed fuel E–85 it is unnecessary to introduce the anticorrosion additives. The effect of nanocarbon clusters on the tribological properties of ethanol motor fuels is studied. A decrease in damage of the metal surface for friction pairs of the fuel pumps is observed with the introduction of carboxylic nanoclusters into the ethanol fuel. This indicates the occurrence of friction processes in the hydrodynamic regime due to the increased bearing capacity of the fuel. It is shown that the introduction of additives based on carbon nanoscale clusters into the ethanol fuel allows to create a high-performance motor fuel with improved performance.

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“…[1][2][3] From vacuum deposited amorphous carbon films, Iijima observed CNOs for the first time in 1980. 4 He presented electron micrographs of small spherical particles of graphitized carbon whose sizes varied in between 30-70 Å in diameter.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced Charge Separation in the Carbon Nano-Onion C₆₀@C₂₄₀

Voityuk

Solà

2016

J. Phys. Chem. A

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The double-shell fullerene C60@C240 formed by inclusion of C60 into C240 is the smallest stable carbon nano-onion. In the paper, we analyze in detail the character of excited states of C60@C240 in terms of exciton localization and charge transfer between the inner and outer shells. The unique structure of the buckyonion leads to a large electrostatic stabilization of charge-separated (CS) states in the C60@C240. As a result, the CS states C60 + @C240-lie in the same region of the electronic spectrum (2.4-2.6 eV) as strongly absorbing locally excited states, and therefore, can be effectively populated. The CS states C60 - @C240+ are found to be by 0.5 eV higher in energy than the states C60 + @C240 -.Unlike the situation observed in donor-acceptor systems, the energy of the CS states in C60@C240does not practically depend on the environment polarity. This leads to exceptionally small reorganization energies for electron transfer between the shells. Electronic couplings for photoinduced charge separation and charge recombination processes are calculated. The absolute rate of the formation of the CS states C60 + @C240 -is estimated at ~ 4 ps -1 . The electronic features found in C60@C240 are likely to be shared by other carbon nano-onions.2

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Carbon Nano Onions

Cited by 27 publications

References 58 publications

Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Improvement of Performance Characteristics of Ethanol Motor Fuels Through Use of Additives Based on Nanoscale Carbon Clusters

Photoinduced Charge Separation in the Carbon Nano-Onion C₆₀@C₂₄₀

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Carbon Nano Onions

Cited by 27 publications

References 58 publications

Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Multi‐Functionalized Carbon Nano‐onions as Imaging Probes for Cancer Cells

Improvement of Performance Characteristics of Ethanol Motor Fuels Through Use of Additives Based on Nanoscale Carbon Clusters

Photoinduced Charge Separation in the Carbon Nano-Onion C60@C240

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Photoinduced Charge Separation in the Carbon Nano-Onion C₆₀@C₂₄₀