Spinning yarn from long carbon nanotube arrays

Jayasinghe, Chaminda; Chakrabarti, Supriya; Schulz, Mark J.; Shanov, Vesselin

doi:10.1557/jmr.2010.91

Cited by 76 publications

(35 citation statements)

References 24 publications

(27 reference statements)

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“…The array was fixed and the film was drawn onto a bobbin while the whole bobbin was rotated on plane that contains the axis of the drawing-bobbin. This process has been previously reported by our group [28].…”

Section: Methodssupporting

confidence: 83%

Carbon nanotube assembly at near-industrial natural-fiber spinning rates

Alvarez

Miller

Haase

et al. 2015

Carbon

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Section: Methodssupporting

confidence: 83%

Carbon nanotube assembly at near-industrial natural-fiber spinning rates

Alvarez

Miller

Haase

et al. 2015

Carbon

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“…The as-prepared catalyst is introduced into a chemical vapor deposition (CVD) reactor at 750 • C, where CNTs grow under a stream of an Ar, C 2 H 4 , H 2 , and H 2 O mixture. More details on CNT synthesis have been reported previously by the authors [17]. The as-grown CNT array has a density of 0.03 gm/cm 3 and an average CNT length of 500 μm.…”

Section: Conceptmentioning

confidence: 98%

Electromagnetic Simulation and Measurement of Carbon Nanotube Thread Dipole Antennas

Keller

Zaghloul

Shanov

et al. 2014

IEEE Trans. Nanotechnology

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The conductivity, current distribution, and radiation efficiency for a variety of dipole antennas constructed from carbon nanotube thread/rope are simulated using Hallén's integral equation for a thin wire applied to the method of moments and are compared to a standard copper wire dipole antenna. Next, the conductivity and weight of fully fabricated carbon nanotube thread and rope samples are measured and analyzed. Finally, half-wavelength copper and carbon nanotube (CNT) thread dipole antenna prototypes are fabricated, measured, and analyzed. Simulation results indicate that the CNT thread/rope antenna performance improves with increased diameter and that the application of these materials as a half wavelength dipole antenna yields manageable losses of less than 1-5 dB at RF frequencies above 10 GHz. Measured sample results demonstrate that the existing single-ply CNT thread exhibits a conductivity approximately 2-3 orders of magnitude lower than copper. The braiding method employed to produce large diameter CNT rope was demonstrated to be a poor method for increasing thread diameter and conductivity due to the additional resistive losses that the braiding geometry introduced. Dimethyl sulfoxide densification was found to be a valuable method for improving CNT thread conductivity and lowering the thread contact resistance. Dipole antenna prototype measurements confirm the functionality of the CNT thread as an antenna, albeit with a 4% downward frequency shift due to reactance effects and material losses of greater than 12 dB at 2.45 GHz as predicted by the results from the method of moments simulations.Index Terms-Carbon nanotube (CNT), dimethyl sufoxide, dipole antenna, Hallen's integral equation, method of moments.

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“…Drawable CNTs were synthesized by a CVD process that has been published elsewehere. 38,39 Briefly, synthesis starts with catalyst deposition; thin films of Fe and Co were used as catalyst (1.2 nm). They were sputtered on 4 inch Si wafers that had a 5 nm Al 2 O 3 buffer layer, also deposited by sputtering.…”

Section: Methodsmentioning

confidence: 99%

Optically Transparent Carbon Nanotube Film Electrode for Thin Layer Spectroelectrochemistry

et al. 2015

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Carbon nanotube (CNT) film was evaluated as an optically transparent electrode (OTE) for thin layer spectroelectrochemistry. Chemically inert CNT arrays were synthesized by chemical vapor deposition (CVD) using thin films of Fe and Co as catalysts. Vertically aligned CNT arrays were drawn onto a quartz slide to form CNT films that constituted the OTE. Adequate conductivity and transparency make this material a good OTE for spectroelectrochemistry. These properties could be varied by the number of layers of CNTs used to form the OTE. Detection in the UV/near UV region down to 200 nm can be achieved using these transparent CNT films on quartz. The OTE was characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, UV-visible spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and thin layer spectroelectrochemistry. Ferricyanide, tris(2,2'-bipyridine) ruthenium(II) chloride, and cytochrome c were used as representative redox probes for thin layer spectroelectrochemistry using the CNT film OTE, and the results correlated well with their known properties. Direct electron transfer of cytochrome c was achieved on the CNT film electrode.

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Spinning yarn from long carbon nanotube arrays

Cited by 76 publications

References 24 publications

Carbon nanotube assembly at near-industrial natural-fiber spinning rates

Carbon nanotube assembly at near-industrial natural-fiber spinning rates

Electromagnetic Simulation and Measurement of Carbon Nanotube Thread Dipole Antennas

Optically Transparent Carbon Nanotube Film Electrode for Thin Layer Spectroelectrochemistry

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