Cu-filled carbon nanotubes by simultaneous plasma-assisted copper incorporation

Zhang, G. Y.; Wang, E. G.

doi:10.1063/1.1562341

Cited by 111 publications

(78 citation statements)

References 19 publications

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“…Therefore, the nanocables, i.e., a metallic nanowire protected by an insulating and chemically stable outer sheath (usually a nanotube), are desirable. The transition-metal nanowires (TMNWs) encapsulated inside single-wall carbon nanotubes (CNTs) have been studied extensively both experimentally [6][7][8][9][10][11] and theoretically [12][13][14][15]. However, the strong coupling between the encapsulated TMNWs and the CNTs could lead to a few degenerating in electronic and magnetic properties of the nanowires.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study of Ferromagnetic Nanowires Encapsulated Inside Silicon Carbide Nanotubes

Chen

Wang

Yang

et al. 2015

J Supercond Nov Magn

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We have performed the first-principles calculations on the structural, electronic, and magnetic properties of ferromagnetic nanowires encapsulated inside silicon carbide nanotubes (SiCNTs). The results show that three types of the Fe n (n = 5, 9, and 13) nanowires encapsulated inside the (8,8) SiCNT are all exothermic. For both Fe 5 @(8,8) and Fe 9 @(8,8) systems, the initial shapes are preserved without any visible changes after optimization. But for the Fe 13 @(8,8) system, the initial shapes are distorted for both nanowire and nanotube. There are more bands crossing the Fermi level for the minority spin than those for the majority spin, indicating the spin polarization transport process can be achieved in these Fe n @(8,8) systems. The magnetism is mainly confined within the inner Fe nanowires for all three Fe n @(8,8) systems. Our results reveal that the Fe n @(8,8) systems have high spin polarization and magnetic moment and stably exist in atmosphere for long time, and thus can be expected to have potential applications in building nanodevices.

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Section: Introductionmentioning

confidence: 99%

First-Principles Study of Ferromagnetic Nanowires Encapsulated Inside Silicon Carbide Nanotubes

Chen

Wang

Yang

et al. 2015

J Supercond Nov Magn

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“…For example, recently, bamboo-like tapered CNTs possessing copper solely in their tip-compartments were found to be useful for tube spot-welding when the Cu in the compartments melted using current-induced Joule heating inside a transmission electron microscope (TEM). [7] Copper-filled CNTs have been synthesized by several research groups, [8][9][10][11] but their studies were typically restricted to structural and chemical characterizations.…”

mentioning

confidence: 99%

Copper‐Filled Carbon Nanotubes: Rheostatlike Behavior and Femtogram Copper Mass Transport

et al. 2007

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“…The growth continues until the catalytic activity of the Pd/Co. In previous reports, metals were considered to be encapsulated in the hollows of CNTs by the capillary force [8], [15]. Although the capillary force was also active in our experiments, encapsulation was thought to start at the beginning of growth of MF-CNTs.…”

Section: Resultsmentioning

confidence: 66%

Microstructure Analyses of Metal-Filled Carbon Nanotubes Synthesized by Microwave Plasma-Enhanced Chemical Vapor Deposition

Hayashi

Tokunaga

Kaneko

et al. 2006

IEEE Trans. Nanotechnology

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Abstract-Pd/Co-based metal-filled carbon nanotubes (MF-CNTs) were synthesized by a microwave plasma-enhanced chemical vapor deposition method using a bias-enhanced growth technique. Pd/Co-based MF-CNTs were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) electron energy loss spectroscopy (EELS), and Raman spectroscopy. MF-CNTs were well-aligned and uniform in size on a Si substrate. Both multiwall nanotube carbon nanotubes (CNTs) and herringbone (or stacked cups structure) structures were observed. High-resolution TEM revealed that MF-CNTs were composed of highly ordered graphite layers, and the elemental maps of EELS indicate that both Co and Pd metals are present inside the nanotubes. TEM results clearly showed that both Pd and Co metals were successfully encapsulated into the CNTs. We observed a low value for the Raman intensity ratio between D (1355 cm 1 ) and G (1590 cm 1 ) bands with no shift of the G-peak position and no broadening of the G-peak, indicative of high-quality Pd/Co-based MF-CNTs. Based on TEM characterization, we propose a description for the encapsulating mechanisms.Index Terms-Electron energy loss spectroscopy (EELS), metal filled carbon nanotubes (CNTs), microwave plasma-enhanced chemical vapor deposition (MP-CVD), scanning electron microscopy (SEM), transmission electron microscopy (TEM).

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Cu-filled carbon nanotubes by simultaneous plasma-assisted copper incorporation

Cited by 111 publications

References 19 publications

First-Principles Study of Ferromagnetic Nanowires Encapsulated Inside Silicon Carbide Nanotubes

First-Principles Study of Ferromagnetic Nanowires Encapsulated Inside Silicon Carbide Nanotubes

Copper‐Filled Carbon Nanotubes: Rheostatlike Behavior and Femtogram Copper Mass Transport

Microstructure Analyses of Metal-Filled Carbon Nanotubes Synthesized by Microwave Plasma-Enhanced Chemical Vapor Deposition

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