Electrochemical synthesis and characterization of single-walled carbon nanotubes/polypyrrole films on transparent substrates

Hernández‐Ferrer, Javier; Ansón‐Casaos, Alejandro; Martı́nez, M.T.

doi:10.1016/j.electacta.2011.11.075

Cited by 21 publications

(19 citation statements)

References 45 publications

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“…Voltammetric responses revealed the electroactivity of the composite artificial muscles 42,43,45 , greater current flow, hence higher reduction and oxidation charges, and more distinct reduction and oxidation peaks in comparison with neat conducting polymer. [47][48][49][50] Those thin films cannot be peeled off from the electrode or used for the construction of artificial muscles. 43 CNTs influence the range of movement.…”

Section: Introductionmentioning

confidence: 99%

Construction and coulodynamic characterization of PPy-DBS-MWCNT/tape bilayer artificial muscles

2016

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a Polypyrrole-dodecylbenzenesulphonate-multi-walled carbon nanotube (PPy-DBS-MWCNT) films, thick enough (48.6 µm) to be peeled off from the steel electrode, were electrogenerated. Bilayer PPy-DBS-MWCNT/tape artificial muscles were constructed and submitted to potential sweeps with parallel video-recording of their angular displacements. The coulodynamic (angle-charge) responses reveal that the composite shrinks/swells by oxidation/reduction, respectively, due to the reaction-driven cation exchange. Reversible bending movements of 106° occur under faradaic (linear) control of the consumed charge. Minor deviations and hysteresis were identified with irreversible reactions and osmotic processes. The muscle is a faradaic motor.

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Section: Introductionmentioning

confidence: 99%

Construction and coulodynamic characterization of PPy-DBS-MWCNT/tape bilayer artificial muscles

2016

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“…CP-CNT composites can be prepared by chemical polymerization [19][20][21][22][23], electrogeneration (electro deposition) of CP on CNT electrodes [24][25][26][27] or electrochemical co-deposition from a monomeric solution with dispersed CNTs forming a thin composite coating the electrode [28][29][30][31][32][33][34]. The dispersion of CNTs in the monomeric solution has been achieved by the utilization of ionic liquids [35], acidic treatment of the CNT [29,[36][37][38][39] and the utilization of surfactants [32,34,40]. The surfactant sodium dodecylbenzenesulfonate (NaDBS) disperses CNTs at a high degree in aqueous solution [41][42][43][44] and can be utilized in addition as supporting electrolyte for the electrochemical co-deposition process.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis and characterization of self-supported polypyrrole-DBS-MWCNT electrodes

Otero

Schumacher

2016

Journal of Electroanalytical Chemistry

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The electrochemical conditions (electrolyte potential window, monomeric oxidation) for the synthesis of polypyrrole-dodecylbenzenesulfonate-multiwalled carbon nanotube (PPy-DBS-MWCNT) composite were determined. Thick PPy-DBS-MWNT films were electrogenerated and peeled off from the working electrode. Selfsupported PPy-DBS-MWCNT electrodes were fabricated. The morphology of the film was analyzed by SEM. Self-supported electrodes were characterized by potential cycling and by consecutive square potential waves in NaClO 4 aqueous solution with different cathodic potential limits. Higher reduced structures (the current never drops to zero) are obtained and analyzed from voltammetric responses until rising cathodic potential limits (up to −5 V). For high cathodic potentials (N−1 V) a slow hydrogen evolution coexists with the film reduction, as revealed from coulovoltammetric (charge-potential) responses, and the reduction rate decreases without significant polymeric degradation. Degradation of the material electroactivity in NaClO 4 is initiated by anodic overpotentials beyond 1.2 V. Both, oxidation and reduction chronoamperometric responses prove the presence of nucleation processes, most significant during oxidation. Chronocoulometric responses illustrate slower oxidation rates from deeper reduced initial states. The electrochemical responses are explained by reaction-driven conformational and structural changes that are clarified by the coulovoltammetric responses.

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“…However, an alternative method to use CNTs for the modification of the microelectrodes on polymeric substrates has been lately described by using a CNTs/polypyrrole electrodeposition [31][32][33][34]. With this method, SWCNTs/polypyrrole (Ppy) films can be electrochemically grown over the electrodes on the transparent and flexible polymeric substrates [28,29,35].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes as Suitable Interface for Improving Neural Recordings

Gabriel¹,

Illa²,

Guimerà‐Brunet³

et al. 2013

Physical and Chemical Properties of Carbon Nanotubes

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Electrochemical synthesis and characterization of single-walled carbon nanotubes/polypyrrole films on transparent substrates

Cited by 21 publications

References 45 publications

Construction and coulodynamic characterization of PPy-DBS-MWCNT/tape bilayer artificial muscles

Construction and coulodynamic characterization of PPy-DBS-MWCNT/tape bilayer artificial muscles

Electrochemical synthesis and characterization of self-supported polypyrrole-DBS-MWCNT electrodes

Carbon Nanotubes as Suitable Interface for Improving Neural Recordings

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