Effect of MWNT electroless Ag plating on field emission properties of MWNT/Ag nanocomposite cathodes

Ye, Yun; Guo, Tao

doi:10.1016/j.apsusc.2012.10.071

Cited by 14 publications

(9 citation statements)

References 27 publications

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“…Typical C=C bond stretching are observed on both spectra, at a wavenumber of about 1550 cm -1 . It is worth to mention that this value is slight below the typical values of 1570 cm -1 , frequently reported 9,14,15,19,21,22 . Other band present in both spectra is around 3450 cm -1 and is probably related to adsorb O-H groups from humidity 14,15,29,30 .…”

Section: Two Steps Ag Decoratingmentioning

confidence: 81%

“…The deposition of metallic atoms on the surface, by chemical routes, is one of the most common processes for surface modification of CNT. It is usually performed in steps: the functionalization that consists in an acid treatment, in order to create functional carboxylic groups chemically attached to the CNT surface [6][7][8][9][13][14][15]17,20,21 , and the decoration that consists usually in obtaining a suspension of the functionalized CNT into a water soluble metallic salt 7,9,14,16,22 . The metallic salt is responsible for supplying the ions that will bond to the carboxylic groups, forming deposits on the CNT surface.…”

Section: Introductionmentioning

confidence: 99%

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Ag ion decoration for surface modifications of multi-walled carbon nanotubes

et al. 2014

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The production of high performance metal matrix composites depends on a proper design of the surface of the reinforcing phase, ensuring a good contact with a metal phase. In the present work, two Ag decorating procedures to modify the surface of multi-walled carbon nanotubes (MWCNT) were evaluated for further production of aluminum matrix composites. The procedures consisted in a two steps route based on acid oxidation of carbon nanotubes (CNT) followed by suspension in an Ag ion solution; and a single step route, based on the effect of n-dimethylformamide (DMF) as an activation agent of CNT surface, in presence of Ag ions. Transmission and scanning-transmission electron microscopy, Raman and Fourier-transformed infrared spectroscopy were employed in order to characterize the results. The two steps route resulted in Ag nano-particles homogeneously deposited over the CNT surface. The mechanism for the deposition is based on carboxyl and probably hydroxyl functional groups formed in the first step, acting as nucleation sites for Ag precipitation in the second step. The single step route resulted in the formation of sub-micrometric Ag particles heterogeneously mixed to CNT bundles.

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Section: Two Steps Ag Decoratingmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Ag ion decoration for surface modifications of multi-walled carbon nanotubes

et al. 2014

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“…For example, glucose, the most common silver reducing agent for mirror fabrication, can only grow very limited amount of silver nanoparticles on the surface of CNTs. Furthermore, the generated silver nanoparticles showed irregular shapes and variable sizes ranging from 10 nm to 200 nm [31]. Such non-uniform silver growth is likely a result of the fast reaction between the silver cations and glucose.…”

Section: Silver Nanoparticle Growth On M-cntsmentioning

confidence: 99%

Efficient surface modification of carbon nanotubes for fabricating high performance CNT based hybrid nanostructures

Wang

Pandit

et al. 2017

Carbon

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Carbon nanotubes (CNTs) were chemically modified to achieve strong binding strength with the attached functional components as well as good dispersability and nanoparticle sizeuniformity. An efficient multi-oxidation process was developed to create porous out layer with many nanoscale defects on the surface of CNTs for metallic nanoparticle close attachment and bond sufficient oxygen-containing groups, which assisted the dispersion of CNTs in the aqueous solution. The surface modified CNTs have advantages of strong binding capability, large surface area, high mechanical strength and good dispersability, which show great potential as building blocks for hybrid nanomaterials. Monodispersed silver nanoparticles with an average size of 3 nm were formed from inside the created nanoscale defects on the surface of CNTs without any obvious agglomerations. The fabricated hybrid exhibited much enhanced anti-bacterial performance compared to commercial silver nanoparticles due to the combined anti-bacterial effects of CNTs and silver nanoparticles. With these superior properties, the developed surface modification process could be widely

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“…This research has notably included studies on the tubes' distribution method using surfactants [19,20] and the formation of surface metal particles via electroless plating [21,22].…”

Section: Introductionmentioning

confidence: 99%