Noncovalent functionalization of carbon nanotubes backes claudia. Carbon Functionalization: The Potential of Perylene Bisimide Derivatives for the Solubilization of Carbon Nanotubes and Graphene (Adv. Mater. 22 2019-01-26

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Chemistry of nanocarbons

noncovalent functionalization of carbon nanotubes backes claudia

He has performed many important studies of fullerene, endofullerenes, carbon nanotubes and carbon peapods as well as silicon and germanium clusters. The more than six times greater adsorption of tetracene with respect to that of phenanthrene was imputed to the nanoscale curvature of the tube surface, and the consequent difference in the contacts between the molecule and the tube surface. Although one of the most remarkable materials of the 21st century, carbon nanotubes often have limited application because of their intrinsically low solubility and polydispersity. Aspects of organic, physical and analytical chemistry, as well as colloidal sciences are covered in this outstanding work which brings us one step closer to exploiting this super-material to its full potential. Currently he is interested in the optical and electrooptical properties of processable conjugated polymers as well as in the organic chemistry of fullerenes.

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Chemistry of Nanocarbons

noncovalent functionalization of carbon nanotubes backes claudia

As already highlighted above, when polymers are used as the dispersants some free polymer is always present in the solution. Shigeru Nagase is Professor at the Institute for Molecular Science, Okazaki, Japan. As an example, Meuer et al. . In particular both small molecules and high weight polymers have been used as dispersants.

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Noncovalent Functionalization of Carbon Nanotubes

noncovalent functionalization of carbon nanotubes backes claudia

Some polymers are able to undergo conformational changes in response to a pH change, basically due to a protonation or deprotonation step. Aspects of organic, physical and analytical chemistry, as well as colloidal sciences are covered in this outstanding work which brings us one step closer to exploiting this super-material to its full potential. Series Title: Responsibility: by Claudia Backes. The E-mail message field is required. Very recently Oh et al.

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Noncovalent Functionalization of Carbon Nanotubes

noncovalent functionalization of carbon nanotubes backes claudia

Backes Basal-Plane Functionalization of Chemically Exfoliated Molybdenum Disulfide by Diazonium Salts 23 D. Copyright 2012, American Chemical Society. Interestingly, many biomolecules have this capability, providing a viable alternative when reversibility of these processes is preferred. As no water density was observed in the proximity of the tube, they speculated that the individual nanotubes were essentially in a pure hydrocarbon environment. Moreover, the precipitate can be redissolved in solution by bubbling air into the mixture. The author shows that rational surfactant design is a powerful tool for chemists because it can unmask the key to solubilization and allow us to tailor nanotube surface and optical properties in a fully reversible fashion.

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Dr. Claudia Backes

noncovalent functionalization of carbon nanotubes backes claudia

The author shows that rational surfactant design is a powerful tool for chemists because it can unmask the key to solubilization and allow us to tailor nanotube surface and optical properties in a fully reversible fashion. Unlikely, in none of our simulations we have observed hydrophilic chains extending and swelling in the aqueous environment. Once the essential morphological characteristics of a dispersant have been outlined, it will be much easier to conceive novel molecules with additional properties but unchanged functionalities responsible for water or organic solvent solubility or nanotubes debundling. Their main advantages are their cheapness, their ready commercial disposability and simplicity of use. In the last five years we have synthesized different surfactants with the aim to increase the affinity of the dispersant for the nanotube surface or favor its hydrophilicity. Aromatic molecules have a strong affinity for graphitic surfaces via π—stacking. This acid, with a high affinity to the nanotube surface thanks to the presence of pyrene, deprotonates under basic conditions and becomes able to solubilize and separate the nanotubes from carbonaceous impurities in water.

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Noncovalent Side

noncovalent functionalization of carbon nanotubes backes claudia

Coleman Liquid exfoliation of solvent-stabilized few-layer black phosphorus for applications beyond electronics. Despite the introduction in the polar head of the ionic liquid-derived surfactant of aromatic groups i. In this thesis, Claudia Backes guides the reader through her multidisciplinary research into the non-covalent functionalization of carbon nanotubes in water. The oxidation induces polymerization of the peptides which wrap around the nanotube achieving a size-selective dispersion. Nevertheless, the prevailing effect among the two is still under investigation. Multi-walled carbon nanotubes, made up of several concentric graphene cylinders, are much bigger with diameters from a few to tens of nanometers.

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Noncovalent Functionalization of Carbon Nanotubes

noncovalent functionalization of carbon nanotubes backes claudia

Aspects of organic, physical and analytical chemistry, as well as colloidal sciences are covered in this outstanding work which brings us one step closer to exploiting this super-material to its full potential. Contributors discuss topics such as noncovalent interactions, supramolecular assembly, dendrimers, nanocomposites, chirality, nanodevices, host-guest interactions, endohedral fullerenes, magnetic resonance imaging, nanodiamond particles, and graphene. The acidification of the solution to the original acid causes the precipitation of the nanotubes. He has made a wide range of original contributions in theoretical and computational chemistry. In fact, Tournus et al. As a matter of fact solvents characterized by either dipole—dipole or π-orbital overlap interactions may not account for an equivalent dispersion performance, neither equally polar solvents such as acetonitrile dielectric constant 36. Nevertheless, they also showed that a good dispersion is the result of a delicate compromise, i.

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Carbon Functionalization: The Potential of Perylene Bisimide Derivatives for the Solubilization of Carbon Nanotubes and Graphene (Adv. Mater. 22

noncovalent functionalization of carbon nanotubes backes claudia

Design of novel dispersant At this point we have all the hints for properly designing an efficient dispersant for both aqueous and organic solvents. The author shows that rational surfactant design is a powerful tool for chemists because it can unmask the key to solubilization and allow us to tailor nanotube surface and optical properties in a fully reversible fashion. These small molecules have typically a hydrophobic tail and a hydrophilic head group, the former is intended to favor adsorption onto the hydrophobic nanotube walls and the latter to promote affinity with the aqueous bulk solvent. Aspects of organic, physical and analytical chemistry, as well as colloidal sciences are covered in this outstanding work which brings us one step closer to exploiting this super-material to its full potential. The process is reversible and a 2 minutes sonication at 0 °C is enough to regenerate the dispersion. These differences manifest themselves as well when non-covalent interactions are concerned. These conditions confer to nanotubes an intrinsic p-type semiconducting behavior and a reactivity much more pronounced than that of graphite.

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Noncovalent Functionalization Of Carbon Nanotubes: Fundamental Aspects Of Dispersion And Separation In Water (springer Theses) Download

noncovalent functionalization of carbon nanotubes backes claudia

Upper images refer to lateral projections; lower images refer to cross sections. This is an Open Access article under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The review pinpoints also a few examples of dispersant design. The author shows that rational surfactant design is a powerful tool for chemists because it can unmask the key to solubilization and allow us to tailor nanotube surface and optical properties in a fully reversible fashion. He is most widely known for his work on organic conductors and superconductors.

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