Optimization of the DPV potential waveform for determination of ascorbic acid on PEDOT-modified electrodes
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Background: The article presents the state of research on conductive composite materials constructed on the basis of poly (3,4-ethylenedioxythiophene) (PEDOT), a conductive polymer, as well as selected nanoparticles and nanostructures. Combining two or more materials in a composite which is later used in electrode modification can result in obtaining an electrode with new, more desirable properties. One of such fields is pharmacological analysis which, due to the continuous emergence of new substances and often also a need for analyte determination in complex samples, requires newer instruments in the form of suitably sensitive and selective sensors. Contents: The review contains the description of properties of PEDOT and composite PEDOT with polystyrenesulfonates. In the following part, composite materials are described: PEDOT-CNT, PEDOT- nanoparticles, PEDOT-graphene. The review closes with the examples of multi-component composite materials. Conclusion: The on-going development of new substances used in medicine, pharmacy and related fields, as well as the continuous increase in the production and consumption of this type of substances, necessitates constant development and modernization of analytical techniques used for their determination. : Biomedical assays require being able to carry out determinations in different systems, including in vitro ones, without separating individual compounds. It is necessary to be able to identify several substances simultaneously or determine one compound in the presence of chemically similar substances. Modern electrode materials such as PEDOT and nanostructured materials allow for the development of sensors which are getting increasingly better at meeting the requirements of the analysts.
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Poly(3,4-Ethylenedioxythiophene)(PEDOT)is one of the most stable conduct in conducting polymers. In this paper, preparation methods of 3,4-Ethylenedioxythiophene(EDOT)and its polymer(PEDOT)are reviewed. Applications of PEDOT in antistatic, electrolytic capacitor, organic optoelectronic materials and sensor are investigated as well.
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In this paper the progress in study on a new organic conducting polymer–poly(3,4-ethylenedioxythiophene) (PEDOT) is reviewed. Its ground-state structure, excellent advantages and morphology are presented. Then the modification ways such as its copolymers and composites are introduced in detail. Moreover, the applications of PEDOT are also summarized.
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Abstract In the past years, piezo-conductive sensors have drawn great attention in both academic and industrial sectors. The piezo-conductive sensors made by inorganic semiconductors exhibited poor mechanical flexibility, restricting their further practical applications. In this study, we report the piezo-conductive sensors by a semiconducting polymer, poly(3,4-ethylenedioxythiophene) doped with tosylate ions (PEDOT:Tos) thin films. Systemically studies indicate that the piezo-conductive response of the PEDOT:Tos thin films is originated from the deformation of the PEDOT crystal cells and the stretched π-π distances induced by Tos. Moreover, the negative piezo-conductive effect, for the first time, is observed from PEDOT:Tos thin film under the pressure. A working mechanism is further proposed to interpret the transient from a positive to a negative piezo-conductive response within the PEDOT:Tos thin films. Our studies offer a facile route to approach effective piezo-conductive sensors based on conjugated polymers.
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ABSTRACT In the field of tissue engineering, the study of cellular adhesion and migration is of crucial interest. Conducting polymers such as poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) provide an outstanding interface with biology due to their soft nature, which is closer to the mechanical, chemical, and morphological properties of biological systems. In this work, periodically micropatterned PEDOT:PSS thin films are used as a platform to investigate cellular migration. Human cerebral microvascular endothelial cells (hCMEC) show alignment and linear motion along PEDOT:PSS microstripes of varying widths (10–30 μm). In addition, an electrochemical gradient is created on the PEDOT:PSS film along these microstripes to influence the cell behavior. hCMEC cells linearly change their velocities depending on the redox state of the conducting polymer film. This work demonstrates the potential of such conducting polymer platforms to combine, at the same time, several key physicochemical factors for controlling cellular migration. In the future, we envision that these conducting polymer platforms will deliver tools for tissue regeneration and lead to new opportunities in regenerative medicine. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47029.
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Abstract Summary: A step‐by‐step ‘all‐electrochemical’ approach has been presented to develop a multilayer structure of conducting polymers for gas sensors. The integrated structure includes a sensitive layer (polyaniline, PANI) and a conductive bridge consisting of poly(3,4‐ethylenedioxythiophene) (PEDOT). Good sensitivity, stability, and response of the multilayer material to gaseous HCl indicate a possible application of conductive polymers to provide a binding of sensitive elements in sensors or other fields. The conducting multilayer material, Au/ p ATP/PANI/PEDOT, was synthesized electrochemically. magnified image The conducting multilayer material, Au/ p ATP/PANI/PEDOT, was synthesized electrochemically.
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Abstract In this work, a novel conductive polymer composite consisting of poly(3,4-ethylenedioxythiophene) doped with dodecylbenzenesulfonic acid (PEDOT:DBSA) for bioelectronic applications was prepared and optimized. The novel PEDOT:DBSA composite possesses superior biocompatibility toward cell culture and electrical characteristics comparable to the widely used PEDOT:PSS. The cross-linking processes induced by the cross-linker glycidoxypropyltrimethoxysilane (GOPS), which was investigated in detail using Fourier transform Raman spectroscopy and XPS analysis, lead to the excellent long-term stability of PEDOT:DBSA thin films in aqueous solutions, even without treatment at high temperature. The electrical characteristics of PEDOT:DBSA thin films with respect to the level of cross-linking were studied in detail. The conductivity of thin films was significantly improved using sulfuric acid posttreatment. A model transistor device based on PEDOT:DBSA shows typical transistor behavior and suitable electrical properties comparable or superior to those of available conductive polymers in bioelectronics, such as PEDOT:PSS. Based on these properties, the newly developed material is well suited for bioelectronic applications that require long-term contact with living organisms, such as wearable or implantable bioelectronics.
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This review deals with the use of the highly conductive polymer PEDOT:PSS in biomedical and bioelectrochemical systems. The examples of toxic effects on living cells, positive effects of PEDOT:PSS on the viability of cells and tissues are given. The properties of the polymer, methods of increasing its electrical conductivity by its modification with various nanoparticles and nanomaterials are discussed. Examples of using PEDOT and its composites in bioelectrochemical devices, such as biosensors and biofuel cells, are considered. Changes in the characteristics of biosensors and biofuel cells under the influence of PEDOT are discussed.
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Abstract In the past years, piezo-conductive sensors have drawn great attention in both academic and industrial sectors. The piezo-conductive sensors made by inorganic semiconductors exhibited poor mechanical flexibility, restricting their further practical applications. In this study, we report the piezo-conductive sensors by a semiconducting polymer, poly(3,4-ethylenedioxythiophene) doped with tosylate ions (PEDOT:Tos) thin films. Systemically studies indicate that the piezo-conductive response of the PEDOT:Tos thin films is originated from the deformation of the PEDOT crystal cells and the stretched π–π distances induced by Tos. Moreover, the negative piezo-conductive effect, for the first time, is observed from PEDOT:Tos thin film under the pressure. A working mechanism is further proposed to interpret the transient from a positive to a negative piezo-conductive response within the PEDOT:Tos thin films. Our studies offer a facile route to approach effective piezo-conductive sensors based on conjugated polymers.
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This article mainly reviews our recent studies on poly(3,4-ethylenedioxythiophene /poly(4-styrenesulfonate) (PEDOT/PSS) thin films which posses a high conductivity and a high transparency. The highly conductive thin films are potentially utilized to flexible touchscreens as organic transparent electrodes. The review also includes recent patents on PEDOT/PSS thin films. Keywords: Colloids, conducting polymers, organic transparent electrodes, thin films, Poly(3, 4-ethylenedioxythiophene), sulfonic acid, poly(4-styrenesulfonate), NANOFILMS, LOW CONDUCTIVITY, HIGHLY CONDUCTIVE PEDOT/PSS FILMS
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