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Your search keyword '"SWCNT SINGLE WALL CARBON NANOTUBE"' showing total 2 results
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2 results on '"SWCNT SINGLE WALL CARBON NANOTUBE"'

1. Recent advances in CNT/graphene based thermoelectric polymer nanocomposite: A proficient move towards waste energy harvesting.

Author

Dey, Abhijit, Bajpai, Om Prakash, Sikder, Arun K., Chattopadhyay, Santanu, and Shafeeuulla Khan, Md Abdul

Subjects
*CARBON nanotubes, *GRAPHENE, *THERMOELECTRIC power, *POLYMERIC nanocomposites, *ENERGY harvesting, *REFUSE as fuel
Abstract

Carbon nano tube (CNT)/graphene filled organic composites have great potential for making cheaper thermoelectric materials towards their gear up for applications in energy harvesting due to their low cost, low density, facile routes of preparations, versatile processability and low thermal conductivity. These properties make them superior compared to previously reported hybrid alloys. Now a day׳s CNT and graphene are most frequently used nanofillers due to their unique shape and characteristics such as superconductivity, light weight, high stiffness and axial strength. Moreover, to achieve superior dispersion and properties of composites, various functionalizations on the graphene and CNT have been accomplished by various research groups. Foremost objective of this paper is to highlight the recent research advances on CNT and graphene filled thermoelectric (TE) materials for the replacement of inorganic semiconductors. Fundamentally, for polymer composite based thermoplastic (TP) materials, a thermally nonconductive but electrically connected nano-structured network should be established. [ABSTRACT FROM AUTHOR]

Published
2016
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2. Chiral-selective growth of single-walled carbon nanotubes on Fe-based catalysts using CO as carbon source

Author

Hua Jiang, Annick Loiseau, Maoshuai He, Jani Sainio, Maarit Karppinen, Hongzhi Cui, Elena D. Obraztsova, Pavel V. Fedotov, Alexander I. Chernov, Hua Jin, Na Wei, Esko I. Kauppinen, Weiguo Zhang, Laboratoire d'étude des microstructures [Châtillon] (LEM - ONERA - CNRS), Centre National de la Recherche Scientifique (CNRS)-ONERA, Shandong University of Science and Technology, A. M. Prokhorov General Physics Institute (GPI), Russian Academy of Sciences [Moscow] (RAS), and Aalto University School of Science and Technology [Aalto, Finland]

Subjects
Materials science, ta221, Inorganic chemistry, Nucleation, Nanoparticle, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 01 natural sciences, Catalysis, law.invention, law, NANOTUBE CARBONE, General Materials Science, Solubility, Bimetallic strip, ta114, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, SWCNT SINGLE WALL CARBON NANOTUBE, 0210 nano-technology, Chirality (chemistry), Solid solution
Abstract

International audience; MgO supported monometallic Fe (FeMgO) and bimetallic FeMn (FeMnMgO) catalysts were developed for growing carbon nanotubes using CO as carbon source. Characterizations on the FeMgO catalyst revealed that Fe cations were well-dispersed in the porous MgO support, forming a solid solution. Since most Fe cations in the solid solution are difficult to reduce, FeMgO can only catalyze the growth of single-walled carbon nanotubes (SWCNTs) at temperatures of 700 °C and above. While Fe cations in FeMnMgO could be reduced at lower temperatures with the assistance of Mn, catalyzing the subsequent growth of SWCNTs. Compared with most SWCNTs grown on components like Co or Ni at ambient reaction pressure, the Fe-catalyzed SWCNTs demonstrate rather narrow chirality distributions. Particularly, preferential (6, 5) tube growth on FeMnMgO was achieved at 600 °C. The narrow SWCNT chirality distribution could be inherently related to the high carbon solubility of Fe nanoparticles, favoring the nucleation of SWCNTs by a perpendicular mode. The present studies not only offer essential insights into SWCNT growth mechanisms, but can guide the design of novel catalysts for chirality-controlled growth of SWCNTs.

Published
2016
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