CESR in multi walled carbon nanotubes

Ishii, Satoshi; Aoki, Nobuyuki; Miyamoto, K; Oguri, Nobuko; Horiuchi, Kazunaga; Ochiai, Y.

doi:10.1016/s1386-9477(02)00889-5

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…In the case of the former technique, high temperatures make structural defects inside the CNT, which behave as scattering centers enhancing the resistivity [13][14][15][16]. In the case of the latter technique, expensive instruments and a toxic diborane gas are needed.…”

Section: Introductionmentioning

confidence: 99%

New synthesis and physical property of low resistivity boron-doped multi-walled carbon nanotubes

Ishii

Watanabe

Ueda

et al. 2008

Physica C: Superconductivity

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Section: Introductionmentioning

confidence: 99%

New synthesis and physical property of low resistivity boron-doped multi-walled carbon nanotubes

Ishii

Watanabe

Ueda

et al. 2008

Physica C: Superconductivity

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“…The width of the resonance spectrum depends on the loading with carbon nanofi bers. The slight asymmetry of the resonance line is due to the damping of the microwave fi eld within the conducting domains of CNF via skin effect [34][35][36][37][38] . For conducting samples, if the time required to the electron to diffuse through the skin depth is larger than the time required to the time required for the electron to traverse the sample, the resonance line should be described with a fair accuracy by a symmetric Lorentzian-like shape 39 .…”

Section: Resultsmentioning

confidence: 99%

Polycarbonate-Carbon Nanofibers Composites: An Electron Spin Resonance Study

Chipara¹,

Brittain

Lau

et al. 2008

Polymers and Polymer Composites

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Electron spin resonance investigations on polycarbonate loaded with various amounts of carbon nanofibers (ranging from 0% to 10%) are reported. A complex resonance spectrum was recorded. The spectrum was assigned to the convolution of resonance lines originating from the conducting electrons delocalized over the metallic domains of nanotubes, of free radicals generated during the polymer processing, and of catalyst's traces. The shape of resonance spectra originating from conducting electrons delocalized over the metallic domains of nanotubes was accurately fitted by a Lorentzian-like shape. The correlation between the measured DC resistivity of these samples and the relevant parameters of the resonance spectrum (line width, g-factor, and ratio between the amplitude of the absorption and dispersion components) was investigated. The saturation of the ESR line, at room temperature is reported.

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“…However, the high-temperature annealing induced defects, which decreases the doping effect [12]. Because of the defects, which behaved as a scattering center, the conductivity in CNTs was decreased [13,14] and the CNTs were conglomerated into each other [15]. In another method, electron cyclotron resonance chemical vapor deposition (ECR-CVD) was employed for doping using diborane as a source material.…”

mentioning

confidence: 99%

Transport properties of multi‐walled carbon nanotubes grown by boron addition method

Ishii

Okutsu

Ueda

et al. 2008

Phys. Status Solidi (c)

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The transport property of boron‐doped multi‐walled carbon nanotubes (MWNTs) was investigated. The boron‐doped MWNTs were grown by a novel CVD process using a methanol solution of boric acid as a source material. In order to evaluate the transport property accurately, the electrical conductivity of each individual MWNT was measured by a four‐point method. Nano‐sized four electrodes with a width of several hundred nanometers were fabricated on an individual MWNT using electron beam (EB) lithography. The conductivity of a boron‐doped MWNT was one or two orders of magnitude higher than that of a non‐doped MWNT at room temperature. Furthermore, the boron‐doped MWNT was found to maintain a high conductivity at a very low temperature of 0.6 K, while the non‐doped MWNT became an insulator. The electrical conductivity of the MWNTs was increased by boron doping. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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CESR in multi walled carbon nanotubes

Cited by 6 publications

References 10 publications

New synthesis and physical property of low resistivity boron-doped multi-walled carbon nanotubes

New synthesis and physical property of low resistivity boron-doped multi-walled carbon nanotubes

Polycarbonate-Carbon Nanofibers Composites: An Electron Spin Resonance Study

Transport properties of multi‐walled carbon nanotubes grown by boron addition method

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