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Carbon nanotube

About: Carbon nanotube is a research topic. Over the lifetime, 109079 publications have been published within this topic receiving 3648600 citations. The topic is also known as: CNT & Nanotubes, Carbon.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors report on the characterization of PECVD deposited nanotubes using Auger Electron Spectroscopy (AES) and show that by adjusting the deposition gas ratios, using depth-profiled composition analysis, it is possible to eliminate the unwanted amorphous carbon on the substrate surface.
Abstract: Plasma-enhanced chemical vapor deposition (PECVD) is a versatile technique for growing well-aligned, precisely patterned, multiwalled carbon nanotubes directly on substrates. We report on the characterization of PECVD deposited nanotubes using Auger Electron Spectroscopy (AES); we believe that this is the first comprehensive AES study of nanotubes and the effect of the deposition process on the substrate. The nanotubes contained well-crystallized graphitic carbon, in contrast to the amorphous/disordered carbon byproduct which is condensed on the substrate surface. By adjusting the deposition gas ratios, we show, using depth-profiled composition analysis, that it is possible to eliminate the unwanted amorphous carbon on the substrate surface. However, a 5 nm interfacial layer, which contained the plasma species, was always present on the substrate surface due to its exposure to the plasma. We could prevent the formation of this interfacial layer by shielding areas of the substrate from the plasma to achiev...

85 citations

Journal ArticleDOI
01 Feb 2010-Carbon
TL;DR: In this article, single-walled carbon nanotubes (SWCNTs) were synthesized by the carbon monoxide disproportionation reaction on Fe catalyst particles formed by ferrocene vapor decomposition in a laminar flow aerosol (floating catalyst) reactor.

85 citations

Journal ArticleDOI
TL;DR: In this article, a flexible and wearable sensor based on carbon nanotube nanocomposite for monitoring specific physiological parameters is presented. And the sensor patch is connected to a monitoring device from one end and attached to the body on the other for examining purposes.
Abstract: The paper presents the design, development, and fabrication of a flexible and wearable sensor based on carbon nanotube nanocomposite for monitoring specific physiological parameters. Polydimethylsiloxane (PDMS) was used as the substrate with a thin layer of a nanocomposite comprising functionalized multi-walled carbon nanotubes (MWCNTs) and PDMS as electrodes. The sensor patch functionalized on strain-sensitive capacitive sensing from interdigitated electrodes which were patterned with a laser on the nanocomposite layer. The thickness of the electrode layer was optimized regarding strain and conductivity. The sensor patch was connected to a monitoring device from one end and attached to the body on the other for examining purposes. Experimental results show the capability of the sensor patch used to detect respiration and limb movements. This work is a stepping stone of the sensing system to be developed for multiple physiological parameters.

85 citations

Journal ArticleDOI
19 Feb 2018
TL;DR: A possible photocatalytic reaction mechanism over the CNTs/Bi12O17Cl2 composite was proposed based on the results of trapping experiment, ESR measurements and the band energy analysis.
Abstract: A novel carbon nanotubes modified Bi12O17Cl2 composite (CNTs/Bi12O17Cl2) was prepared via hydrothermal method. The chemical structures, morphologies, optical properties of the synthesized samples were revealed by XRD, XPS, SEM, TEM, BET and UV-vis DRS measurements. The photocatalytic activity of the CNTs/Bi12O17Cl2 composite was evaluated with degradation reaction of rhodamine B (RhB) under visible light. CNTs/Bi12O17Cl2 exhibited improved photocatalytic activity in comparison with pure Bi12O17Cl2, and kept favorable stability and recyclability in the reaction. The relatively high photocatalytic activity of CNTs/Bi12O17Cl2 resulted from the enhanced separation efficiency of photo-induced charges, which were revealed by the photoluminescence spectra and transient photocurrent measurements. CNTs loaded at the surface of Bi12O17Cl2 sheets acted as electron carriers to efficiently transfer the photoinduced electrons, namely to promote the separation of photoinduced electrons and holes, thus improving the photocatalytic activity of the composite materials. At last, a possible photocatalytic reaction mechanism over the CNTs/Bi12O17Cl2 composite was proposed based on the results of trapping experiment, ESR measurements and the band energy analysis.

85 citations

Journal ArticleDOI
Sanqing Huang1, Li Li1, Zhibin Yang1, Lingli Zhang1, Hexige Saiyin1, Tao Chen1, Huisheng Peng1 
TL;DR: Recently, increasing interest has been paid to carbon nanotube (CNT)/poly mer composite composite materials, which may represent a family of promising electrode materials to simultaneously solve the above challenges due to incorporated excellent properties from CNTs and polymers.
Abstract: High-temperature or vacuum processes are typically required to fabricate them, resulting in high costs. These electrode materials have been also shown to be unstable in many conditions, e.g., platinum may be dissolved in corrosive electrolytes and indium tin oxide is fragile and not resistant to acid. [ 4–6 ] In addition, there are limited sources for either platinum or indium. These disadvantages have largely hindered their practical applications in a wide variety of fi elds. Therefore, it is highly desired to develop new electrode materials with good stability, high effi ciency, and low cost. Recently, increasing interest has been paid to carbon nanotube (CNT)/poly mer composite fi lms, which may represent a family of promising electrode materials to simultaneously solve the above challenges due to incorporated excellent properties from CNTs and polymers. CNTs exhibit high mechanical strength and electrical conductivity, while polymers provide good fl exibility, high transparency, easy processing, and low cost. [ 7 , 8 ] CNT/polymer fi lms have been typically fabricated by dispersing two moieties in solvent, followed by spin coating or other solution processes. [ 9 ] Although it is easy to operate with relatively high effi ciency, random dispersion of CNTs in polymer matrices greatly decreases the physical properties of resulting composite fi lms. [ 10 ] For instance, electrical conductivities of CNT/polymer fi lms at room temperature are often less than 10 − 3 S cm − 1 , which largely reduces their electrode applications. In order to improve their electrical conductivities, aligned CNT/polymer fi lms by using CNT sheets as templates have been recently realized, and conductivities up to 10 2 S cm − 1

85 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20233,950
20228,313
20214,499
20205,340
20196,000