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Wen Q.,Tsinghua University | Qian W.,Tsinghua University | Nie J.,Tsinghua University | Cao A.,Peking University | And 6 more authors.
Advanced Materials | Year: 2010

Direct growth of 100 mm long, semiconducting triple-walled carbon nanotubes (TWNTs) on Si substrates by chemical vapor depoistion is reported. By tailoring the temperature for a certain gas flow rate, a yield of nearly 90% of centimeterlong TWNTs is obtained. The TWNTs show an unprecedented structural homogeneity, in which each shell maintains a constant chiral index extending over a very large distance (>60mm). The semiconducting TWNTs can be directly fabricated into field-effect transistors. (Figure Presented) © 2010 WILEY-VCH Verlag GmbH & Co. KGaA.


He P.,Harbin Institute of Technology | Lu X.-C.,Harbin Institute of Technology | Lin T.-S.,Harbin Institute of Technology | Li H.-X.,Harbin Institute of Technology | And 6 more authors.
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2012

Carbon nanotubes (CNTs) reinforced Sn-58Bi composites were successfully fabricated through ball-milling method and low temperature melting process. The influence of multi-walled carbon nanotubes (MWCNTs) on the mechanical strength and ductility of Sn-58Bi lead-free alloy was studied. The mechanical test results show that the bending strength of Sn-58Bi-0.03CNTs (mass fraction, %) composite is increased by 10.5% than that of the Sn-58Bi alloy, which can be attributed to the reduction of Sn-rich segregation and the grain refinement. The toughness of Sn-58Bi-0.03CNTs composite is increased by 48.9% than that of the matrix materials. It is indicated that the influence of CNTs on the strength of Sn-58Bi-xCNTs composite is insignificant. In addition, the fracture mechanism of CNTs reinforced Sn-Bi composite was analyzed. The corresponding fracture surface comparison between the Sn-58Bi-0.03CNTs composite and the monolithic Sn-58Bi alloy was made to identify the influence of CNTs on the fracture behavior and the reinforcing effect of CNTs. © 2012 The Nonferrous Metals Society of China.


Ye H.-Q.,South China University of Technology | Deng Y.-H.,South China University of Technology | Yan Y.,Cnano Technology | Zhang M.-J.,Cnano Technology | And 2 more authors.
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2015

The influence of sodium lignosulfonate (SLS) fractions with different molecular weights on the adsorption characteristics of multi-walled carbon nanotubes (MWCNTs) and their dispersion performance was studied using gel permeation chromatography (GPC), UV-Vis spectroscopy, elementary analysis, Fourier transform infrared (FT-IR) spectroscopy, zeta potential analysis, and scanning electron microscopy (SEM). The results indicate that SLS with higher molecular weight disperse MWCNTs better and that dispersed MWCNTs exhibit lower specific resistance and increased conductivity. It is supposed that SLS fraction with higher molecular weight has more aromatic rings, thus accounting for stronger π–π interactions with MWCNTs and increased adsorption amount. ©Editorial office of Acta Physico-Chimica Sinica.


Patent
Cnano Technology | Date: 2014-07-22

Carbon nanotube-based compositions and methods of making an electrode for a battery are disclosed. It is an objective of the instant invention to disclose a composition for an electrode of a battery incorporating three dimensional networks of carbonaceous materials comprising a bi-modal diameter distribution of carbon nanotubes, CNT(A) and CNT(B), graphene, carbon black and, optionally, other forms of carbon-based pastes.


Patent
Cnano Technology | Date: 2011-01-13

Carbon nanotube-based compositions and methods of making an electrode for a Li ion battery are disclosed. It is an objective of the instant invention to disclose a composition for preparing an electrode of a lithium ion battery with incorporation of carbon nanotubes with more active material by having less conductive filler loading and less binder loading such that battery performance is enhanced.


Patent
Cnano Technology | Date: 2011-01-13

Carbon-nanotube based pastes and methods for making and using the same are disclosed. Carbon nanotubes are dispersed via milling; resultant paste has Hegman scale of greater than 7. The pastes can be used as electro-conductivity enhancement in electronic devices such as batteries, capacitors, electrodes or other devices needing high conductivity paste.


Patent
Cnano Technology | Date: 2012-04-02

Carbon nanotube-based compositions and methods of making an electrode for a Li ion battery are disclosed. It is an objective of the instant invention to disclose a composition for preparing an electrode of battery, optionally a lithium ion battery, with incorporation of a bi-modal diameter distributed carbon nanotubes with more active material by having less total conductive filler loading, less binder loading, and better electrical contact between conductive filler with active battery materials such that battery performance is enhanced.


Patent
Cnano Technology | Date: 2011-10-31

The present disclosure relates to pastes and methods of making a moisture determination of the paste during manufacture; optionally, the pastes comprise carbon nanotubes.


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