The Experts below are selected from a list of 9462 Experts worldwide ranked by ideXlab platform
M A Deyab - One of the best experts on this subject based on the ideXlab platform.
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corrosion protection of aluminum bipolar plates with Polyaniline coating containing carbon nanotubes in acidic medium inside the Polymer electrolyte membrane fuel cell
Journal of Power Sources, 2014Co-Authors: M A DeyabAbstract:Abstract The effect of addition of carbon nanotubes (CNTs) on the corrosion resistance of conductive Polymer coating (Polyaniline) that coated aluminum bipolar plates in acidic environment inside the PEM fuel cell (0.1 M H2SO4) was investigated using electrical conductivity, polarization and electrochemical impedance spectroscopy (EIS) measurements. Scanning electron microscopy (SEM) was used to characterize the coating morphology. The results show that the addition of CNTs to Polyaniline coating enhanced the electrical conductivity and the corrosion resistance of Polyaniline Polymer. The inhibition efficiency of Polyaniline Polymer increased with increasing CNTs concentration. The best inhibition was generally obtained at 0.8% CNTs concentration in the acidic medium. This was further confirmed by decreasing the oxygen and water permeability and increasing coating adhesion in the presence of CNTs. EIS measurements indicated that the incorporation of CNTs in coating increased both the charge transfer and pore resistances while reducing the double layer capacitance.
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corrosion protection of aluminum bipolar plates with Polyaniline coating containing carbon nanotubes in acidic medium inside the Polymer electrolyte membrane fuel cell
Journal of Power Sources, 2014Co-Authors: M A DeyabAbstract:Abstract The effect of addition of carbon nanotubes (CNTs) on the corrosion resistance of conductive Polymer coating (Polyaniline) that coated aluminum bipolar plates in acidic environment inside the PEM fuel cell (0.1 M H2SO4) was investigated using electrical conductivity, polarization and electrochemical impedance spectroscopy (EIS) measurements. Scanning electron microscopy (SEM) was used to characterize the coating morphology. The results show that the addition of CNTs to Polyaniline coating enhanced the electrical conductivity and the corrosion resistance of Polyaniline Polymer. The inhibition efficiency of Polyaniline Polymer increased with increasing CNTs concentration. The best inhibition was generally obtained at 0.8% CNTs concentration in the acidic medium. This was further confirmed by decreasing the oxygen and water permeability and increasing coating adhesion in the presence of CNTs. EIS measurements indicated that the incorporation of CNTs in coating increased both the charge transfer and pore resistances while reducing the double layer capacitance.
P. K. Ivanova-mitseva - One of the best experts on this subject based on the ideXlab platform.
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Development of label-free impedimetric platform based on new conductive Polyaniline Polymer and three-dimensional interdigitated electrode array for biosensor applications
Electrochimica Acta, 2015Co-Authors: Edita Voitechovič, Andrey Bratov, Natalia Abramova, J. Razumienė, Dmitry Kirsanov, Andrey Legin, Dhana Lakshmi, Sergey A. Piletsky, Michael J. Whitcombe, P. K. Ivanova-mitsevaAbstract:Abstract Novel label-free impedimetric platform based on a three-dimensional interdigitated electrode array (3D-IDEA) sensor and new conductive Polymer as a transducer for oxidoreductases is introduced. This platform is cost-effective, simple to construct and miniaturize. Monomer of conductive Polymer N-(N’,N’-diethyldithiocarbamoylethylamidoethyl) aniline (AnD) was deposited onto 3D-IDEA by chemical Polymerisation. It was found that the Polymer film resistance depends on the redox-potential of the solution. For the first time polyAnD was used as enzyme immobilisation matrix. Pyrroloquinolinequinone (PQQ) dependent alcohol and glucose dehydrogenases were immobilized on 3D-IDEA covered with polyAnD by two different methods. 3D-IDEA sensors with enzymes, which were immobilised by physisorption on polyAnD layer, showed specific response in the presence of 1 μM of the corresponding substrates. Obtained results revealed that PQQ dependent dehydrogenases can re-oxidize on polyAnD via direct electron transfer (DET) from enzyme active site to the Polymer surface. This process can be monitored by methods of electrochemical impedance spectroscopy (EIS) and chronoamperometry. Presented study shows that EIS method gives a useful tool for research of re-oxidation process and interaction of electroactive enzymes with conducting materials giving information required to construct and develop analytical devices.
Edita Voitechovič - One of the best experts on this subject based on the ideXlab platform.
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Development of label-free impedimetric platform based on new conductive Polyaniline Polymer and three-dimensional interdigitated electrode array for biosensor applications
Electrochimica Acta, 2015Co-Authors: Edita Voitechovič, Andrey Bratov, Natalia Abramova, J. Razumienė, Dmitry Kirsanov, Andrey Legin, Dhana Lakshmi, Sergey A. Piletsky, Michael J. Whitcombe, P. K. Ivanova-mitsevaAbstract:Abstract Novel label-free impedimetric platform based on a three-dimensional interdigitated electrode array (3D-IDEA) sensor and new conductive Polymer as a transducer for oxidoreductases is introduced. This platform is cost-effective, simple to construct and miniaturize. Monomer of conductive Polymer N-(N’,N’-diethyldithiocarbamoylethylamidoethyl) aniline (AnD) was deposited onto 3D-IDEA by chemical Polymerisation. It was found that the Polymer film resistance depends on the redox-potential of the solution. For the first time polyAnD was used as enzyme immobilisation matrix. Pyrroloquinolinequinone (PQQ) dependent alcohol and glucose dehydrogenases were immobilized on 3D-IDEA covered with polyAnD by two different methods. 3D-IDEA sensors with enzymes, which were immobilised by physisorption on polyAnD layer, showed specific response in the presence of 1 μM of the corresponding substrates. Obtained results revealed that PQQ dependent dehydrogenases can re-oxidize on polyAnD via direct electron transfer (DET) from enzyme active site to the Polymer surface. This process can be monitored by methods of electrochemical impedance spectroscopy (EIS) and chronoamperometry. Presented study shows that EIS method gives a useful tool for research of re-oxidation process and interaction of electroactive enzymes with conducting materials giving information required to construct and develop analytical devices.
Xiaoqi Xu - One of the best experts on this subject based on the ideXlab platform.
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A facile fabrication of multifunctional knit polyester fabric based on chitosan and Polyaniline Polymer nanocomposite
Applied Surface Science, 2014Co-Authors: Xiao Ning Tang, Shifeng Zhu, Kaikai Sun, Xili Hu, Xiaoqing Guo, Yujiao Wang, Guangting Han, Mingwei Tian, Lijun Qu, Xiaoqi XuAbstract:Knit polyester fabric was successively modified and decorated with chitosan layer and Polyaniline Polymer nanocomposite layer in this paper. The fabric was firstly treated with chitosan to form a stable layer through the pad-dry-cure process, and then the Polyaniline Polymer nanocomposite layer was established on the outer layer by in situ chemical Polymerization method using ammonium persulfate as oxidant and chlorhydric acid as dopant. The surface morphology of coated fabric was characterized by scanning electron microscopy (SEM), and the co-existence of chitosan layer and granular Polyaniline Polymer nanocomposite was confirmed and well dispersed on the fabric surface. The resultant fabric was endowed with remarkable electrical conductivity properties and efficient water-repellent capability, which also have been found stable after water laundering. In addition, the photocatalytic decomposition activity for reactive red dye was observed when the multifunctional knit polyester fabric was exposed to the illumination of ultraviolet lamp. These results indicated that chitosan and Polyaniline Polymer nanocomposite could form ideal multifunctional coatings on the surface of knit polyester fabric.
J. Razumienė - One of the best experts on this subject based on the ideXlab platform.
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Development of label-free impedimetric platform based on new conductive Polyaniline Polymer and three-dimensional interdigitated electrode array for biosensor applications
Electrochimica Acta, 2015Co-Authors: Edita Voitechovič, Andrey Bratov, Natalia Abramova, J. Razumienė, Dmitry Kirsanov, Andrey Legin, Dhana Lakshmi, Sergey A. Piletsky, Michael J. Whitcombe, P. K. Ivanova-mitsevaAbstract:Abstract Novel label-free impedimetric platform based on a three-dimensional interdigitated electrode array (3D-IDEA) sensor and new conductive Polymer as a transducer for oxidoreductases is introduced. This platform is cost-effective, simple to construct and miniaturize. Monomer of conductive Polymer N-(N’,N’-diethyldithiocarbamoylethylamidoethyl) aniline (AnD) was deposited onto 3D-IDEA by chemical Polymerisation. It was found that the Polymer film resistance depends on the redox-potential of the solution. For the first time polyAnD was used as enzyme immobilisation matrix. Pyrroloquinolinequinone (PQQ) dependent alcohol and glucose dehydrogenases were immobilized on 3D-IDEA covered with polyAnD by two different methods. 3D-IDEA sensors with enzymes, which were immobilised by physisorption on polyAnD layer, showed specific response in the presence of 1 μM of the corresponding substrates. Obtained results revealed that PQQ dependent dehydrogenases can re-oxidize on polyAnD via direct electron transfer (DET) from enzyme active site to the Polymer surface. This process can be monitored by methods of electrochemical impedance spectroscopy (EIS) and chronoamperometry. Presented study shows that EIS method gives a useful tool for research of re-oxidation process and interaction of electroactive enzymes with conducting materials giving information required to construct and develop analytical devices.