Effects of different electrolytes and film thicknesses on structural and thermoelectric properties of electropolymerized poly(3,4-ethylenedioxythiophene) films

Seki, Yoldaş; Takahashi, Momoko; Takashiri, Masayuki

doi:10.1039/c9ra02310k

Cited by 35 publications

(32 citation statements)

References 52 publications

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“…This finding is consistent with literature reports stating that, generally, conducting polymer films formed in organic solvents are more conductive than those formed in aqueous solutions [22,23]. This is a result of a greater conjugation length of the polymer and more concise contact with the electrode surface [24] and may arise from different solubility of PEDOT oligomers in different solvents at the initial stages of polymerization [25]. The oligomers precipitate more readily in ACN, attaching to the electrode surface and forming a high number of nucleation centers [25,26].…”

Section: Electrochemical Polymerizationsupporting

confidence: 92%

Dopant-Dependent Electrical and Biological Functionality of PEDOT in Bioelectronics

et al. 2021

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The aspiration to interact living cells with electronics challenges researchers to develop materials working at the interface of these two distinct environments. A successful interfacing coating should exhibit both biocompatibility and desired functionality of a bio-integrated device. Taking into account biodiversity, the tissue interface should be fine-tuned to the specific requirements of the bioelectronic systems. In this study, we pointed to electrochemical doping of conducting polymers as a strategy enabling the efficient manufacturing of interfacing platforms, in which features could be easily adjusted. Consequently, we fabricated conducting films based on a poly(3,4-ethylenedioxythiophene) (PEDOT) matrix, with properties modulated through doping with selected ions: PSS− (poly(styrene sulfonate)), ClO4− (perchlorate), and PF6− (hexafluorophosphate). Striving to extend the knowledge on the relationships governing the dopant effect on PEDOT films, the samples were characterized in terms of their chemical, morphological, and electrochemical properties. To investigate the impact of the materials on attachment and growth of cells, rat neuroblastoma B35 cells were cultured on their surface and analyzed using scanning electron microscopy and biological assays. Eventually, it was shown that through the choice of a dopant and doping conditions, PEDOT-based materials can be efficiently tuned with diversified physicochemical properties. Therefore, our results proved electrochemical doping of PEDOT as a valuable strategy facilitating the development of promising tissue interfacing materials with characteristics tailored as required.

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Section: Electrochemical Polymerizationsupporting

confidence: 92%

Dopant-Dependent Electrical and Biological Functionality of PEDOT in Bioelectronics

et al. 2021

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“…Certainly, inorganic materials exhibit high thermoelectric performance, but flexibility and material cost are causes for concern [15][16][17] . Therefore, conductive polymers and carbon nanotubes (CNTs) have been developed as thermoelectric materials [18][19][20][21] . These materials have high flexibility, and the material cost is lower than that of inorganic thermoelectric materials.…”

mentioning

confidence: 99%

Facile preparation of air-stable n-type thermoelectric single-wall carbon nanotube films with anionic surfactants

Seki

Nagata

Takashiri

2020

Sci Rep

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thermoelectric generators based on single-wall carbon nanotubes (SWcnts) have great potential for use in wearable and skin electronics because of their lightweight and mechanically soft structure. However, the fabrication of air-stable n-type thermoelectric SWcnts using conventional processes is challenging. Herein, we propose a facile process for fabricating air-stable n-type SWCNT films with anionic surfactants via drop casting followed by heat treatment. We examined different surfactants (Sodium Dodecyl Sulfate, Sodium Dodecylbenzene Sulfonate, and Sodium cholate) and heat-treatment temperatures. The optimal SWCNT film maintained the n-type Seebeck coefficient for 35 days. Moreover, to further extend the n-type Seebeck coefficient maintenance, we periodically reheated the SWCNT film with a surfactant that had returned to the p-type Seebeck coefficient. The reheated film recovered the n-type Seebeck coefficient, and the effect of the reheating treatment lasted for several reheating cycles. finally, we elucidated a simple mechanism for realizing an air-stable n-type Seebeck coefficient based on spectroscopic analyses of the SWCNT films.

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“…The polymer length is largely determined by the polymer solubility as chain propagation is terminated by precipitation. 49 In the PDP method, however, the neutral trimers should not dissolve in the polymerization solution, which is a prerequisite for the method to work. One might therefore expect that chain propagation should be impossible since the termination condition is already met from start.…”

Section: Resultsmentioning

confidence: 99%

Rocking-Chair Proton Batteries with Conducting Redox Polymer Active Materials and Protic Ionic Liquid Electrolytes

Wang

Emanuelsson

Karlsson

et al. 2021

ACS Appl. Mater. Interfaces

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Rechargeable batteries that use redox-active organic compounds are currently considered an energy storage technology for the future. Functionalizing redox-active groups onto conducting polymers to make conducting redox polymers (CRPs) can effectively solve the low conductivity and dissolution problems of redox-active compounds. Here, we employ a solution-processable postdeposition polymerization (PDP) method, where the rearrangements ensured by partial dissolution of intermediated trimer during polymerization were found significant to produce high-performance CRPs. We show that quinizarin (Qz)- and naphthoquinone (NQ)-based CRPs can reach their theoretical capacity through optimization of the polymerization conditions. Combining the two CRPs, with the Qz-CRP as a cathode, the NQ-CRP as an anode, and a protic ionic liquid electrolyte, yields a 0.8 V proton rocking-chair battery. The conducting additive-free all-organic proton battery exhibits a capacity of 62 mAh/g and a capacity retention of 80% after 500 cycles using rapid potentiostatic charging and galvanostatic discharge at 4.5 C.

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Effects of different electrolytes and film thicknesses on structural and thermoelectric properties of electropolymerized poly(3,4-ethylenedioxythiophene) films

Abstract: The effects of electrolyte type and film thickness on the structural and thermoelectric properties of poly(3,4-ethylenedioxythiophene) (PEDOT) thin films on indium-tin-oxide (ITO) substrates prepared using electropolymerization were investigated.

Cited by 35 publications

References 52 publications

Dopant-Dependent Electrical and Biological Functionality of PEDOT in Bioelectronics

Dopant-Dependent Electrical and Biological Functionality of PEDOT in Bioelectronics

Facile preparation of air-stable n-type thermoelectric single-wall carbon nanotube films with anionic surfactants

Rocking-Chair Proton Batteries with Conducting Redox Polymer Active Materials and Protic Ionic Liquid Electrolytes

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