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Mechanical and electrical properties of cross-linked carbon nanotubes

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Abstract.
Several macroscopic assemblies of carbon nanotubes(CNTs), consisting only of CNTs, have
been developed for the maximum utilization of their characteristic properties for macroscale
structures. These include bucky paper, freestanding films, and fibres. However, these
materials have limited performance, because the CNTs are assembled via weak interactions,
such as van der Waals forces, or the entanglement of CNTs. Here, we report an isotropic
bulk form of randomly oriented CNTs in which they are cross-linked with each other
through chemical reaction between functional groups on them. The reaction is included by
spark plasma sintering. This chemical cross-linking provides a strength of 100 MPa with
improved electrical conduction. Compared to a CNT pellet before sintering, the electric
conductivity of cross-linked CNT increases by one order from 2 S/cm to 24 S/cm at room
temperature and at the same time, the activation energy for electric conduction is
decreased. The increased electrical conductivity is related to increased inter-CNT transport
of charge carriers, with the cross-links providing bridges for them. The enhancement of
mechanical strength and electric conduction by this cross-linking allows wider applications
of macroscopic assemblies of CNTs as sensors, transistors, electrodes, actuators
and fibres.

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Ketersediaan

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Informasi Detail

Judul Seri

CARBON

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2008

Deskripsi Fisik

CARBON 46 (2008) 482 –488

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

46 (2008)

Subjek

KIMIA KARBON

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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