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Author

Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Highly Conducting and Flexible Few-Walled Carbon Nanotube Thin Film

Cited 22 times inthomson ciCited 24 times inthomson ci
Title
Highly Conducting and Flexible Few-Walled Carbon Nanotube Thin Film
Author
Kumar, Nanjundan AshokJeon, In-YupSohn, Gyung-JooJain, RahulKumar, SatishBaek, Jong-Beom
Keywords
Capacitive behavior; conducting thin film; Cyclic voltammograms; Electrical conductivity; few-walled carbon nanotubes; Four-probe measurement; Free-standing thin films; Friedel-crafts acylation; functionalization; Functionalized; Microscopic study; Non destructive; Rectangular shapes; Room temperature; Suction filtration
Issue Date
201103
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.5, no.3, pp.2324 - 2331
Abstract
We report an effective route to prepare highly conducting and flexible few walled carbon nanotube (FWNT) thin films. The free-standing thin films were fabricated by functionalizing FWNTs with 4-ethoxybenzoic acid (EBA) via a direct Friedel-Crafts acylation reaction in a nondestructive polyphosphoric acid/Phosphorus pentoxide medium. The resulting ethoxybenzoyl-functionalized FWNT (EBA-f-FWNT) was readily dispersible in water. EBA-f-FWNT thin films were formed by a simple suction filtration of the dispersed solution. Electron microscopic studies were employed to characterize the morphologies of the resulting thin films. The obtained results indicate that the structure of FWNTs was not perturbed by the incorporation of EBA moieties, which were uniformly grafted onto FWNTs forming the FWNT networks. Room temperature electrical conductivity of the thin films was obtained using standard four-probe measurements, which revealed a value as high as 29 400 S m(-1), While the tensile strength and modulus of the film were found to be about 80 MPa and 15 GPa, respectively. Cyclic voltammograms revealed a rectangular shape, with superior capacitive behaviors nearing 133 F/g for the thin films, which is very attractive for capacitor applications.
URI
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DOI
http://dx.doi.org/10.1021/nn103630y
ISSN
1936-0851
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