01777nas a2200181   4500008004100000022001400041245008300055210006900138260012500207300001100332490000800343520103000351100002901381700002101410700003001431700001701461856011701478       2012                        eng d  a0021-897900aCharge transport in functionalized multi-wall carbon nanotube-Nafion composite0 aCharge transport in functionalized multiwall carbon nanotubeNafi  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScSEP  a0537060 v1123 a<p>The charge transport in sulfonated multi-wall carbon nanotube (sMWNT)-Nafion composite is reported. The scanning electron microscope images of the composite, at 1 and 10 wt % of sMWNT, show that the nanotubes are well dispersed in polymer matrix, with conductivity values of 0.005 and 3.2 S/cm, respectively; and the percolation threshold is nearly 0.42 wt. %. The exponent (similar to 0.25) of the temperature dependence of conductivity in both samples indicates Mott's variable range hopping (VRH) transport. The conductance in 1 wt. % sample increases by three orders of magnitude at high electric-fields, consistent with VRH model. The negative magnetoresistance in 10 wt. % sample is attributed to the forward interference scattering mechanism in VRH transport. The ac conductance in 1 wt. % sample is expressed by sigma(omega) proportional to omega(s), and the temperature dependence of s follows the correlated barrier hopping model. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749264]</p>1 aSangeeth, C., S. Suchand1 aKannan, Ramaiyan1 aPillai, Vijayamohanan, K.1 aMenon, Reghu  uhttps://library.ncl.res.in/content/charge-transport-functionalized-multi-wall-carbon-nanotube-nafion-composite-0