Poly PEDOT nanotubes

Initially, poly(vinyl alcohol] (PVA] solution was electrospun and further treated with FeCl3 solution to adsorb Fe ions on the nanofibers surface. Later, an EDOT monomer was evaporated and polymerized on the PVA surface, leading to coaxial PVA/PEDOT fibers, which were washed with distillated water, giving 140 nm PEDOT tubes. PEDOT nanotubes achieved electrical conductivity values of 61 S/cm higher than the usual PEDOT nanomaterials... 

PLGA)), into which a drug (here dexamethasone, an anti-inflammatory drug) has been incorporated, followed by electrochemical deposition of a conducting polymer (here poly(3,4-ethylenedioxythiophene) PEDOT) around the drug-loaded, electrospun biodegradable polymers. Dexamethasone can be released from the PEDOT nanotubes in a desired fashion by subsequent electrical stimulation of the PEDOT nanotubes this process presumably proceeds by a local dilation or contraction of the tube that promotes mass transport. 

Figure 3.17 (a) A PEDOT nanotube polymerized around a poly(lactide-co-glycolide)... 

Electronically conducting polymers (ECPs) such as polyaniline (PANI), pol3T5yrrole (PPy) and poly(3,4-ethylenedioxjdhiophene) (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 cataljdic 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. 

PNMA, poly(N-methylaniline) PANI, poly(aniline) PEDOT, poly(3,4-ethylenedioxythiphene PSS, poly(styrene-sulfonate), PPy, poly(pyrrole) PEO, poly(ethylene oxide) DBSA, dodecylbenzene sulfonic acid CSA, camphor sulfonic acid PTSA, poly(o-toluene sulfonic acid) PFOA, perfluoro-octanolc acid TSA, toluene sulfonic acid CNF, carbon nanofiber SWCNT, single-walled carbon nanotube NP, nanoparticle MWCNT, multiwalled carbon nanotube PTh, poly(thlphene) CNT, carbon nanotube POA, poly(o-anisidine) SPANI, poly(anilinesulfonlcacld) PB, Prussian Blue DAB, 1,2-diamino benzene POEA, poly(o-ethoxyanlllne) PMMA, poly(methyl methacrylate). 

Figure 15.5 Left SEM image ofPEDOT nanotubes on a neural probe tip Right mass release of dexamethasone from poly(lactide-co-glycolide) (PLGA) fibers (black), PEDOT-coated PLGA nanoscale fibers without electrical stimulation (red), and PEDOT-coated PLGA nanoscale fibers with electrical stimulation of 1 Vat the times with the circled data. (Reprinted with permission from Advanced Materials, Conducting-polymer nanotubes for controlled drug release by M. R. Abidian, D.-H. Kim and D.C. Martin, 18, 4, 405-409. Copyright (2006) Wiley-VCH)...

Xiao et al. investigated the electrochemical synthetic mechanism of conducting-polymer nanotubes in a porous alumina template using poly(3,4-ethylenedioxythiophaie) (PEDOT) as a model compound [70]. The electrochemical polymerization of EDOT was performed potentiostatically at various potentials from 1.0 to 1.8 V (vs. Ag/AgCl) in a solution containing EDOT, LiC104, and acetonitrile. They found that the tubular portion of the nanotube structure increased as the applied potential increased from 1.4 to 1.8 V at a fixed concentration of EDOT, while the tubular portion decreased with increasing monomer concentration from 10 to 100 mM at a fixed poteitial of 1.6 V. 

PANI rechargeable batteries [183], Nanotubes and nanowires of conducting polymers, including PANI, polypyrrole (PPy], and poly(3,4-ethylenedioxythiophene] (PEDOT], can be synthesized by electrochemical methods using the AAO templates [184],... 

There are various methods to synthesize polymer nanostructures, i.e., template synthesis, chiral reactions, self-assembly, interfacial polymerization and electrospinning. Recent developments in conducting polymer nanotubes and nanofibers were summarized by Long et al. Different preparation methods, physical properties, and potential applications of one-dimensional nanostructures of conjugated polyaniline (PANI), pol5 3nrole (PPy) and poly (3, 4-ethylenediox3d hiophene) (PEDOT) were discussed. 

PABS polyaminobenzene sulfonic acid SWCNT single-walled carbon nanotube PANI polyanUine CNT carbon nanotube PMAS poly(2-methoxyaniline-5-sulfonic acid) MWCNT multiwalled carbon nanotube PEDOT poly(3,4-ethyl-ene dioxythiophene) PSS polystyrene sulfonated acid TMA trimethylamine TEA triethylamine Source. Data from Kukkola et al. (2012), etc. 

Mousavi, Z., J. Bobacka, A. Lewenstam, and A. Ivaska. 2009. Poly(3,4-ethylenedioxythiophene) (PEDOT) doped with carbon nanotubes as ion-to-electron transducer in polymer membrane-based potassium ion-selective electrodes. J. Electroanal. Chem. 633 246-252. 

Platinum (Pt) has been extensively used as the CE in DSSCs due to its effective catalytic for 13 ions. However, as platinum is a noble metal, therefore, low-cost and abundant materials have been developed including carbonaceous materials like graphite, carbon black, carbon nanotubes, and polymers like poly(3,4-ethylenedioxythiophene) (PEDOT) and polystyrene sulfonate (PEDOT-PSS) as potential low-cost replacements for platinum [76-78]. 

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