Multiwalled carbon nanotubes characteristics

Two weak signals related to the nitro group were observed at 1538 and 1340 cm-i for ox-N-MWCNTs. Similar spectra have been reported for oxidized multiwall carbon nanotubes characteristic poaks were assigned to carboxylic, carbonyl, and hydroxyl group (Wang et al., 2007). These results have probe that sp>ectra carefully acquired by FTIR-ATR are a useful tool for identification of chemical group attached to surface of carbon nanotubes chemically modified. 

Rothen-Rutishauser, B. et al. (2010) Relating the physicochemical characteristics and dispersion of multiwalled carbon nanotubes in different suspension media to their... 

Zhao X, Ando Y, Qin LC, Kataura H et al (2002) Characteristic Raman spectra of multiwalled carbon nanotubes. Physica B-Cond Mat 323(l ) 265-266... 

A novel route to pure and composite fibers of polypyrrole was recently reported by Han and Shi [42]. An organic salt (FeAOT) was synthesized by the reaction of sodium l,4-bis(2-ethyUiexyl)sulfosuccinate (AOT) and ferric chloride. It was fabricated into nanofibers by manual drawing and electrospinning. Long PPy fibers were obtained for the first time by a vapor deposition reaction of pyrrole on the FeAOT fibers, and this technique was extended to the synthesis of PPy composite fibers with multiwalled carbon nanotubes (PPy-MWCNT fibers). The PPy and PPy-MWCNT fibers had a nanoporous morphology, a conductivity of 10-15 S cm and a tensile strength of 12—43 MPa. Studies of the electrochemistry and current-voltage characteristics of the PPy fibers were also reported. 

Additionally, different additives were studied to enhance the actuation characteristics of ionic polymer-metal composites. Multiwalled carbon nanotubes (M-CNT) were incorporated in the polymer matrix to improve mechanical properties and electrical conductivity. The tests indeed showed... 

Carbon nanotubes (CNT) are formed by a hollow cylinder formed by a unique carbon sheet forming a single walled carbon nanotube (SWCNT) or concentric carbon sheets with different diameters forming multiwalled carbon nanotubes (MWCNT) with carbon-carbon with sp bonding [75]. The particular cylindrical form of CNT is the principal aspect that provides the quantum confinement effect in the oriented ID nanostructured materials [80]. These characteristics provide the possibUity to increase chemical reactivity and electronic properties of this particular carbon material, which becomes a crucial point for biosensing devices [75]. 

Varghese OK, Kichambre PD, Gong D, Ong KG, Dickey EC, Grimes CA (2001) Gas sensing characteristics of multiwall carbon nanotubes. Sens Actuators B 81 32-41... 

Hu C-C, Wu Y-T (2004) Effects of electrochemical activation and multiwall carbon nanotubes on the capacitive characteristics of thick M11O2 deposits. J Electrochm Soc 15LA2060-A2066... 

For comparison, the voltammetry characteristics (5 mV/s) performed on the multiwalled carbon nanotubes in the same way as for the activated carbon cloth are shown in Fig. 9.16. 

Zhang, M. Huang, J. Yu, P. Chen, X. (2010). Preparation and characteristics of protein molecularly imprinted membranes on the surface of multiwalled carbon nanotubes. Talanta, 81,162-166. 

Liu, C. 2005. The electrochemical capacitance characteristics of activated carbon electrode material with a multiwalled carbon nanotube additive. New Carbon Materials, 20,205-210. 

Lee Myung Jin, Lee Cheoljin, Singh R. Ved, Kum-Pyo Yoo, and Nam-Ki Min. Humidity sensing characteristics of plasma functionalized multiwall carbon nanotube-polyimide composite films. IEEE Sensors. 4716470 (2008) 430-433. 

Shanmugharaj AM, Bae JH, Lee KY, Noh WH, Lee SH, Ryu SH (2007) Physical and chemical characteristics of multiwalled carbon nanotubes functionalized with aminosilane and its influence on the properties of natural rubber composites. Compos Sci Technol 67 1813-1822... 

Li Y., Chen C., Zhong S., Ni Y, and Huang J., Electrical conductivity and electromagnetic interference shielding characteristics of multiwalled carbon nanotube filled polyacrylate composite films. Applied Surface Science 2008, 254, 5766-5771. 

In Figure 2 the case of a multiwalled carbon nanotubes (MWCNT)/ Polyurethane (PUR) nanocomposite is contemplated. Details on the characteristics of this nanocomposite are given in reference 11. The influence of MWCNT concentration and temperature on tan 5 spectra is shown. The frequency at which the relaxation takes place, (co)Max, shifts to higher frequencies with MWCNT content, reflecting that shorter X= (o)Max times are necessary to block PUR chains motions as the nanoparticles are more abundant. However, at concentrations below 3% MWCNT no relaxation is observed, which indicates that such a reduced number of MWCNTs is incapable of hindering the motion of PUR chains. 

Semet, V., Binh, V., Guillot, D., Teo, K., Chhowalla, M., Amaratunga, G., Milne, W., Legagneux, P, 8c Pribat, D. (2005). Reversible electromechanical characteristics of individual multiwall carbon nanotubes. Applied Physics Letters, 87,223103. 

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