Carbon nanotubes -based electrochemical preparation

Electronically conducting polymers (ECPs) such as polyaniline (PANI), polypyrrole (PPy) and po 1 y(3.4-cthy 1 cncdi oxyth iophcnc) (PEDOT) have been applied in supercapacitors, due to their excellent electrochemical properties and lower cost than other ECPs. We demonstrated that multi-walled carbon nanotubes (CNTs) prepared by catalytic decomposition of acetylene in a solid solution are very effective conductivity additives in composite materials based on ECPs. In this paper, we show that a successful application of ECPs in supercapacitor technologies could be possible only in an asymmetric configuration, i.e. with electrodes of different nature. 

Another recent topic in detection of OP compounds based on ChE-modified biosensors is to use carbon nanotubes (CNTs) as an electrode modifier. CNTs are known to exhibit excellent electrochemical properties originating from high catalytic activity of edge-plane-like graphite sites at CNT ends and a large effective surface area. Lin et al. (2004) have reported that stable CNT-modified glassy carbon (GC) electrodes can be prepared by coating the surface of GC electrode with a suspension of CNT and can be used for sensitive determination of thiocholine (Liu etal,... 

Figure 5.11 FTIR spectra of PANl-ES (curve 1, a) and PANI-salt functionalized SWNT composites (curves 2, a). These composites were electrochemically prepared by the achievement of 75, 150, and 300 cycles (curves 4, 3, and 2, respectively) with the SWNT film immersed in the solution of aniline and HCI 0.5 M, in the potential range (-200 +700) mV vs. SCE with a sweep rate of 100 mVs FTIR spectra ofPANI-EB (curve 1, b) andPANI-base-functionalized SWNT composites (curves 2-4, b) obtained by a subsequent reaction of PANi-sait-functiona-lizedSWNTs (curve 2 4, a) with NH4OH 1M solution. (Reprinted with permission from Carbon, Covalent functionalization of single-walled carbon nanotubes by aniline electrochemical polymerization by M. Baibarac, I. Baltog, S. Lefrant et al., 42, 15, 3143-3152. Copyright (2004) Elsevier Ltd)...

Lu D, Lin S, Wang L, Li T, Wang C, Zhang Y (2014) Sensitive detection of luteolin based on poly (diallyldimethylammonium chloride)-functionalized graphene-carbon nanotubes hybrid/p-cyclodextrin composite film. J Solid State Electrochem 18(l) 269-278 Ma Y, Wu D, Liu Y, Li X, Qiao H, Yu Z-Z (2014a) Electrically conductive and super-tough polypropylene/carbon nanotube nanocomposites prepared by melt compounding. Compos B Eng 56 384-391... 

Zhou HJ, Zhang ZP, Yu P, Su L, Ohsaka T, Mao LQ. Noncovalent attachment of NAD" " cofactor onto carbon nanotubes for preparation of integrated dehydrogenase-based electrochemical biosensors. Langmuir 2010 26 6028-6032. 

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