Biomimetic Conducting Polymers: Synthesis, Materials, Properties, Functions, and Devices

Otero, Toribio F.

doi:10.1080/15583724.2013.805772

Cited by 131 publications

(110 citation statements)

References 142 publications

(183 reference statements)

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“…Likewise, the R sol starts at 0% and increases as the film swells. The increase in thickness due to polymer oxidation is already described in literature [62][63][64]. The change of this resistance are presented in Figure 6.…”

Section: Neutral Poma (Reduced Form)mentioning

confidence: 58%

“…This suggests that the presence of perchlorate leads to an increase in the twisting of the monomeric units, leading to a slight chain shortening. Macroscopically, such shortening is associated with a change in volume that, as described in different papers [62,66,67] and in Figure 6, could be responsible for the polymer degradation when submitted to electrochemical cycles.…”

Section: Computational Modelling Of the Redox Behaviour Of Poma Filmsmentioning

confidence: 99%

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Properties improvement of poly(o-methoxyaniline) based supercapacitors: experimental and theoretical behaviour study of self-doping effect

Gonçalves

Christinelli

Trench

et al. 2017

Electrochimica Acta

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ABSTRACT:Conducting polymers (CP) are very versatile materials with important properties due to their unique structure, including redox behaviour upon electrochemical polarization. Supercapacitors are among the devices in which CP show a promising performance due to their large specific capacitance. However, the major drawback of these materials is their low durability, which is an inbuilt process caused by ion intercalation, a side effect of the redox process. A viable strategy to increase CP stability is, therefore, the inhibition of the ion intercalation/de-intercalation process. Several strategies have been proposed to minimize this effect, among them self-doping. Self-doping makes the redox process mass-transport independent, decreasing the response time and increasing durability. With this purpose, this work have described the synthesis of layer-by-layer films (LBL) of poly(omethoxyaniline)/poly(3-thiopheneacetic acid) (POMA/PTAA) and contributes to understand how the redox process leads to premature aging, and how self-doping minimizes this problem. The main techniques of characterisation used were electrochemical impedance spectroscopy (EIS) experiments and density functional theory (DFT) calculations. EIS provides important information about the electrochemical behaviour, while DFT calculations allowed to characterize, at the molecular level, the changes in the material structure. The association of both techniques helped to understand how self-doping improves the POMA properties. DFT calculations showed that in the layer-by-layer (LBL) films, the twisting of the polymer chain due to the oxidation is 12% less while the chain shortening is 5% compared with films prepared POMA by casting. The EIS data showed the effect of these molecular changes in the structure; the swelling of the LBL films is 50% less than cast ones. These observations are important because the PTAA layer acts beyond a chargecompensator, working as a backbone structure that mechanically stabilize the POMA layer, leading to an increase in the durability, and improving the electrochemical properties.

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Section: Neutral Poma (Reduced Form)mentioning

confidence: 58%

Section: Computational Modelling Of the Redox Behaviour Of Poma Filmsmentioning

confidence: 99%

Properties improvement of poly(o-methoxyaniline) based supercapacitors: experimental and theoretical behaviour study of self-doping effect

Gonçalves

Christinelli

Trench

et al. 2017

Electrochimica Acta

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“…The backbone of PPy lacks electrons under oxidative conditions in the polymerization process, which needs anions to balance its positive charge (Supplementary Information and Supplementary Figure S2). 28 Thus, negatively charged drugs are able to dope into PPy under oxidative conditions. When under reductive conditions, the backbone of PPy is neutralized; therefore, the anions are pushed out from the PPy backbone.…”

Section: Synthesis Of Pda-ppy-mcsmentioning

confidence: 99%

Electroresponsive and cell-affinitive polydopamine/polypyrrole composite microcapsules with a dual-function of on-demand drug delivery and cell stimulation for electrical therapy

Xie

Han

et al. 2017

NPG Asia Mater

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Electrical therapy has attracted significant attention because it can modulate cell behaviors and accelerate tissue repair. However, the effectiveness of electrical therapy is limited. This work develops electroresponsive and conductive polydopaminepolypyrrole microcapsules (PDA-PPy-MCs) on titanium surfaces using electrochemical deposition. During the electrochemical process, PDA and dexamethasone (DEX) as the anion are doped into a PPy backbone to neutralize its positive charge. PDA-PPy-MCs possess the cell affinity of PDA, the microstructure of MCs and the electroresponsive capability of PPy. The incorporation of PDA promotes the conductivity and adhesive strength of PPy. PDA-PPy-MCs can respond to electrical signals to release DEX on demand because of the redox behavior of PPy. The microstructure and PDA improve the drug-loading capability of PDA-PPy-MCs. A high-throughput bone marrow stromal cell (BMSC) culture system is designed to study the synergistic effects of composition, microstructure and electrical stimulation on cell behavior. The results indicate that PDA and the microporous structure not only enhance the biocompatibility of PDA-PPy-MC but also strengthen the effect of electrical stimulation. In vivo implantation shows that PDA-PPy-MCs have good biocompatibility. The high cell affinity, microstructure, conductivity and ability to control drug delivery using electrical signals make PDA-PPy-MCs a promising candidate for an on-demand drug delivery and electrical therapy system.

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“…[11][12][13][14] Specifically, significant efforts have been focused on CP actuators that exhibit large volume changes in air upon the sorption or desorption of the water vapor present in ambient air under the application of an electric current. [15][16][17][18][19][20] For example, a humidity-driven, bilayered, anisotropic actuator has been reported based on a PEDOT-polystyrenesulfonic acid (PEDOT:PSS) layer with a soft poly(dimethylsiloxane) (PDMS) layer. This actuator showed an intrinsic sensing capability via the joule effect or directly via environmental humidity variations.…”

Section: Introductionmentioning

confidence: 99%

Construction of a photothermal Venus flytrap from conductive polymer bimorphs

Lim

Park

et al. 2017

NPG Asia Mater

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A photothermally foldable soft bimorph was prepared via the dry transfer of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with tosylate onto a poly(dimethylsiloxane) film. The photothermal folding was optimized via reversible actuation by controlling the thickness of each layer and the temperature increase to afford large deflection and displacement up to 150°and 420 mm, respectively, upon exposure to near-infrared (NIR) light (808 nm). A two-dimensional array of the bimorph converted into complex three-dimensional architectures, such as a Venus flytrap, under light and reversibly unfolded in the dark. Taking advantage of the photothermal nature of PEDOT, a localized heat pocket was generated inside the folding structure. Thus, a Venus flytrap with a hot pocket reaching 100°C was realized for the first time. The Venus flytrap could trap and move an object within a few seconds of NIR exposure.

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Biomimetic Conducting Polymers: Synthesis, Materials, Properties, Functions, and Devices

Cited by 131 publications

References 142 publications

Properties improvement of poly(o-methoxyaniline) based supercapacitors: experimental and theoretical behaviour study of self-doping effect

Properties improvement of poly(o-methoxyaniline) based supercapacitors: experimental and theoretical behaviour study of self-doping effect

Electroresponsive and cell-affinitive polydopamine/polypyrrole composite microcapsules with a dual-function of on-demand drug delivery and cell stimulation for electrical therapy

Construction of a photothermal Venus flytrap from conductive polymer bimorphs

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