Water-Soluble, Exfoliated, Nonroping Single-Wall Carbon Nanotubes

Hudson, Jared L.; Casavant, M. J.; Tour, James M.

doi:10.1021/ja0467061

Cited by 214 publications

(154 citation statements)

References 22 publications

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“…Covalent functionalization will convert sp 2 carbon atoms to sp 3 hybridization and disrupt the p-conjugation system, which leads to the signal intensity increasing in the D-band. 2,20 The increasing intensity at 1301 cm…”

Section: Resultsmentioning

confidence: 99%

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

Zhang

Henthorn

2009

AIChE Journal

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A considerable amount of research has been devoted to carbon nanotubes because of their unique electrical, mechanical, optical, and chemical properties. Here, in this report, we introduce a novel, simple ultraviolet initiated ''graft from'' polymerization method to synthesize PEGylated carbon nanotubes. This grafting procedure significantly enhanced nanotube aqueous dispersibility and long term stability in solution. Mass of grafted polymer chains was easily modulated by adjusting polymerization reaction time, and nanomaterials containing up to 80% polymer by weight were synthesized. Nanotube morphology was characterized by SEM, TEM before and after the functionalization. In addition, the covalent bonding of polymer chains to the nanotubes structure was elucidated by Raman, ATR-FTIR, and XPS spectroscopy.

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Section: Resultsmentioning

confidence: 99%

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

Zhang

Henthorn

2009

AIChE Journal

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“…[139] The Tour group later developed a means of functionalizing SWNTs in fuming sulfuric acid (oleum) to afford unbundled individual SWNT-arylsulfonic acids that did not require either surfactant or polymer-based prewrapping, centrifugation, or sonication. [140] A method was subsequently developed to create bulk quantities of oleum-treated water-soluble SWNTs containing multifunctional addends, that avoided the further use of either high-powered sonication, centrifugation, or even oleum as the solvent. Using individualized SWNTs (initially generated from the oleum procedure though) followed by repetitive aqueous aryl diazonium reactions, multifunctional addends were introduced onto the SWNT surface, including biologically significant molecules or other structurally sensitive moieties that would not otherwise have been able to survive the intrinsically harsh strongly acidic conditions characteristic of oleum.…”

Section: Diazonium Reactionmentioning

confidence: 99%

Functional Covalent Chemistry of Carbon Nanotube Surfaces

2009

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In this Progress Report, we update covalent chemical strategies commonly used for the focused functionalization of single‐walled carbon nanotube (SWNT) surfaces. In recent years, SWNTs have been treated as legitimate nanoscale chemical reagents. Hence, herein we seek to understand, from a structural and mechanistic perspective, the breadth and types of controlled covalent reactions SWNTs can undergo in solution phase, not only at ends and defect sites but also along sidewalls. We explore advances in the formation of nanotube derivatives that essentially maintain and even enhance their performance metrics after precise chemical modification. We especially highlight molecular insights (and corresponding correlation with properties) into the binding of functional moieties onto carbon nanotube surfaces. Controllable chemical functionalization suggests that the unique optical, electronic, and mechanical properties of SWNTs can be much more readily tuned than ever before, with key implications for the generation of truly functional nanoscale working devices.

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“…Unfortunately, unless the NC materials are highly functionalized with oxidative moieties or are shortened using ball milling, they agglomerate irreversibly at weight concentrations 41.0 wt% because of their high aspect ratio (4500) and strong van der Waals attraction, making further processing difficult 8 . However, such severe covalent functionalization of NC materials inevitably degrades their electrical and/or electronic properties to some degree 9,10 . Thus, many additives such as organic surfactants 11 , alkali solutions 12 , superacids 1,2 , N-methylpyrrolidone (NMP) 13 and ionic liquids 4 have been used to prepare highly concentrated NC suspensions.…”

mentioning

confidence: 99%

Dispersant-free conducting pastes for flexible and printed nanocarbon electrodes

et al. 2013

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The dispersant-free fabrication of highly conducting pastes based on organic solvents with nanocarbon materials such as carbon nanotubes and graphene nanoplatelets has been hindered by severe agglomeration. Here we report a straightforward method for fabricating nanocarbon suspensions with 410% weight concentrations in absence of organic dispersants. The method involves introducing supramolecular quadruple hydrogen-bonding motifs into the nanocarbon materials without sacrificing the electrical conductivity. Printed films of these materials show high electrical conductivity of B500,000 S m À 1 by hybridization with 5 vol% silver nanowires. In addition, the printed nanocarbon electrodes provide high-performance alternatives to the platinum catalytic electrodes commonly used in dye-sensitized solar cells and electrochemical electrodes in supercapacitors. The judicious use of supramolecular interactions allows fabrication of printable, spinnable and chemically compatible conducting pastes with high-quality nanocarbon materials, useful in flexible electronics and textile electronics.

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Water-Soluble, Exfoliated, Nonroping Single-Wall Carbon Nanotubes

Cited by 214 publications

References 22 publications

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

Functional Covalent Chemistry of Carbon Nanotube Surfaces

Dispersant-free conducting pastes for flexible and printed nanocarbon electrodes

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