Comparison of surface and bulk doping levels in chemical polypyrroles of low, medium and high conductivity

Carrasco, Pedro M.; Cortázar, M.; Ochoteco, Estíbalitz; Calahorra, E.; Pomposo, José A.

doi:10.1002/sia.2457

Cited by 48 publications

(29 citation statements)

References 40 publications

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“…(1)). 51 Since a decline in the level of π conjugation in PPy decreases the conductivity, 52 one can conclude that the blue shift in PPy spectra is related to the lower conductivity of the sample in humid condition. These results possibly confirm the proposed protonation effect, which is responsible for the higher conductivity achieved in the case of PAni-based sensor when exposed to low humidity levels.…”

Section: Sensing Mechanisms Studiesmentioning

confidence: 99%

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

2014

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This paper addresses the preparation of polyaniline (PAni) and polypyrrole (PPy) nanostructures as humidity sensor elements. The semicrystalline microstructure and chemical structure of synthesized PAni and PPy were studied by X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The morphology of these polymers was studied by scanning electron microscopy and transmission electron microscopy, indicating fibrillar and tubular nanostructures for PAni and PPy, respectively. The humidity sensing performances of sensors based on the prepared nanostructural PAni and PPy were investigated, and the sensing mechanisms of both systems have been discussed. The interesting reverse behaviors during humidity exposure of PAni-and PPy-based sensors in different water vapor concentrations have been comprehensively justified. The temperature dependency of the electrical conductivity for PAni and PPy samples was investigated. The UV-vis spectroscopy was used to study the effect of moisture on the electronic transport properties of PAni and PPy nanostructures. C Experimental MATERIALSThe aniline and pyrrole monomers, hydrochloric acid (HCl), ethanol, ammonium persulphate (APS, (NH 4 ) 2 S 2 O 8 ), and anhydrous iron (III) chloride (FeCl 3 ) were all purchased

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Section: Sensing Mechanisms Studiesmentioning

confidence: 99%

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

2014

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“…2,3 Conducting polymers (CPs) are among the most attractive functional polymers and have been used for many practical applications, such as batteries, 4 antistatic layers, 5 electrochromic displays, 6 biosensors, 7 functional membranes, 8,9 , etc., because of their processing advantages, and because they combine the mechanical properties of plastics with the electronic and optical properties of metals and inorganic semiconductors. 10 However, only a few CPs have been investigated as TE materials, principally polyacetylene, 11 polyaniline, 12 polythiophene, 13 polypyrrole, 14 and derivatives thereof. 15 Among the numerous CPs, poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) is one of the most promising, and has been extensively studied because of its high electrical conductivity, transparency, and environmental stability.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Performance of Poly(3,4-Ethylenedioxy-thiophene)/Poly(Styrenesulfonate) Pellets and Films

Liu

Jiang

Huang

et al. 2011

Journal of Elec Materi

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The thermoelectric performance of poly(3,4-ethylenedioxythiophene)/ poly(styrenesulfonate) (PEDOT/PSS) pellets and free-standing PEDOT/PSS films, prepared from PEDOT/PSS solution containing the additives dimethyl sulfoxide or ethylene glycol, have been systematically investigated. It has been found that the electrical conductivity of free-standing PEDOT/PSS films is invariably much higher than that of PEDOT/PSS pellets, while there is no distinct change in the Seebeck coefficient. The highest electrical conductivity of a free-standing PEDOT/PSS film can be up to 300 S cm À1 , five to six times higher than that of PEDOT/PSS pellets (55 S cm À1 ). The thermal conductivity was measured over a wide temperature range, indicating that PEDOT/PSS has extremely low thermal conductivity. The figure of merit (ZT) of freestanding PEDOT/PSS films with good environmental stability can be up to 10 À2 , an order of magnitude higher than that of pressed PEDOT/PSS pellets (10 À3 ).

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“…Conducting polymers have been extensively studied in recent years due to a great variety of possible applications in several fields, such as energy storage systems [1][2][3], electrocatalysis [4][5][6], electrodialysis membranes [7][8][9][10], sensors [11][12][13], and anticorrosive coatings [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. They exhibit different oxidation states and behave as electronic or mixed conductors [28].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical impedance spectroscopy investigation of chlorinated rubber‐based coatings containing polyaniline as anticorrosion agent

Baldissera

Freitas

Ferreira

2010

Materials & Corrosion

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Corrosion protection of mild steel by a newly developed chlorinated rubber (CR)‐based coating system containing the inherently conductive polymer polyaniline (PAni) as an anticorrosion agent was studied. The synthesis of PAni and preparation of CR‐based paint containing this polymer are described herein. The corrosion behavior of mild steel samples coated with a CR resin, CR/PAni‐EB (emeraldine base), CR/PAni‐ES (emeraldine salt), and CR/DBSA‐doped PAni were investigated in 3.5% NaCl solution. For this purpose, electrochemical impedance spectroscopy and corrosion potential versus time measurements were utilized. It was found that the addition of the two forms of PAni, doped and undoped, to the CR resin increased its corrosion protection efficiency.

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Comparison of surface and bulk doping levels in chemical polypyrroles of low, medium and high conductivity

Cited by 48 publications

References 40 publications

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

Thermoelectric Performance of Poly(3,4-Ethylenedioxy-thiophene)/Poly(Styrenesulfonate) Pellets and Films

Electrochemical impedance spectroscopy investigation of chlorinated rubber‐based coatings containing polyaniline as anticorrosion agent

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