A self-assembly method for the fabrication of a three-dimensional (3D) polypyrrole (PPy)/poly(3,4-ethylenedioxythiophene) (PEDOT) hybrid composite with excellent absorption performance against electromagnetic pollution

Wu, Fan; Sun, Mengxiao; Jiang, Wanchun; Zhang, Kun; Xie, Aming; Wang, Yuan; Wang, Mingyang

doi:10.1039/c5tc02887f

Cited by 52 publications

(20 citation statements)

References 54 publications

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“…Apparently, the hierarchical TF@PPy microrods with multilevel heterojunctions act as a pivotal structure factor in the enhancement of polarization behaviors which improve the loss ability significantly. Besides, it had been proved that dopants and conjugation length dramatically impacted the conductivity of conductive polymers . In this work, TF@PPy‐1 owned the lowest ε′ and ε″ values while TF@PPy‐3 exhibited the largest one among the ternary system under the same concentration of Cl − , revealing the different conjugation degree of PPy shell, which was consistent with the FT‐IR spectra (Figure d) and TEM images (Figure ).…”

Section: Resultssupporting

confidence: 85%

Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption

Ding

Wang

Zhao

et al. 2019

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Core@shell structures have been attracting extensive attention to boost microwave absorption (MA) performance due to the unique interfacial polarization. However, it still remains a challenge to synthesize sophisticated 1D semiconductor‐based materials with excellent MA competence. Herein, a hierarchical cable‐like TiO2@Fe3O4@PPy is fabricated by a sequential process of solvothermal treatment and polymerization. The complex permittivity of ternary composites can be optimized by tunable PPy coating thickness to improve the loss ability. The maximum reflection loss can reach −61.8 dB with a thickness of 3.2 mm while the efficient absorption bandwidth can achieve over 6.0 GHz, which involves the X and Ku band at only a 2.2 mm thickness. Importantly, the heterojunction contacts constructed by PPy–Fe3O4 and Fe3O4–TiO2 contribute to the enhanced polarization loss. Besides, the configuration of magnetic Fe3O4 sandwiched between dielectric TiO2 and PPy facilitates the magnetic stray field to radiate into the TiO2 core and out of the PPy shell, which significantly promotes magnetic–dielectric synergy. Electron holography validates the distinct charge distribution and magnetic coupling. The new findings might shed light on novel structures for functional core@shell composites and the design of semiconductor‐based materials for microwave absorption.

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Section: Resultssupporting

confidence: 85%

Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption

Ding

Wang

Zhao

et al. 2019

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305

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“…From this perspective, the field of neuroelectrode engineering has encouraged the use of alternative electroactive materials over conventional metallic strategies such as gold and platinum as an approach to provide an electrochemical platform for the immobilization of biological molecules, or in order to promote physicomechanical mimicry through soft or topographically rough interfaces . Specifically, semiconducting polymers, including polypyrrole and poly(3,4‐ethylenedioxythiophene) (PEDOT), and their hybrids have been employed widely in neural engineering because of their versatility as electrode coatings through electrodeposition processes, and have been employed to enhance the neuroelectrode electrochemical profile, and provide a platform for chemical and morphological functionalization to meet particular requirements …”

Section: Introductionmentioning

confidence: 99%

Attenuated Glial Reactivity on Topographically Functionalized Poly(3,4‐Ethylenedioxythiophene):P‐Toluene Sulfonate (PEDOT:PTS) Neuroelectrodes Fabricated by Microimprint Lithography

Vallejo-Giraldo

Krukiewicz

Calaresu

et al. 2018

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Following implantation, neuroelectrode functionality is susceptible to deterioration via reactive host cell response and glial scar-induced encapsulation. Within the neuroengineering community, there is a consensus that the induction of selective adhesion and regulated cellular interaction at the tissue-electrode interface can significantly enhance device interfacing and functionality in vivo. In particular, topographical modification holds promise for the development of functionalized neural interfaces to mediate initial cell adhesion and the subsequent evolution of gliosis, minimizing the onset of a proinflammatory glial phenotype, to provide long-term stability. Herein, a low-temperature microimprint-lithography technique for the development of micro-topographically functionalized neuroelectrode interfaces in electrodeposited poly(3,4-ethylenedioxythiophene):p-toluene sulfonate (PEDOT:PTS) is described and assessed in vitro. Platinum (Pt) microelectrodes are subjected to electrodeposition of a PEDOT:PTS microcoating, which is subsequently topographically functionalized with an ordered array of micropits, inducing a significant reduction in electrode electrical impedance and an increase in charge storage capacity. Furthermore, topographically functionalized electrodes reduce the adhesion of reactive astrocytes in vitro, evident from morphological changes in cell area, focal adhesion formation, and the synthesis of proinflammatory cytokines and chemokine factors. This study contributes to the understanding of gliosis in complex primary mixed cell cultures, and describes the role of micro-topographically modified neural interfaces in the development of stable microelectrode interfaces.

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“…Traditional absorbers are mainly composed of ferromagnetic metals [ 8 ], carbon [ 9 ], and conducting polymers materials [ 10 ]. However, ferromagnetic metals are susceptible to corrosion, and are high density with insufficient bandwidth [ 11 ]; the high conductivity of the pure carbon and conducting polymers materials always induce an eddy current effect and reflection [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption

Sun

Sui

et al. 2018

Materials

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To clear away the harmful effects of the increment of electromagnetic pollution, high performance absorbers with appropriate impedance matching and strong attenuation capacity are strongly desired. In this study, a chain-like PPy aerogel decorated with MOF-derived nanoporous Co/C (Co/C@PPy) has been successfully prepared by a self-assembled polymerization method. With a filler loading ratio of 10 wt %, the composite of Co/C@PPy could achieve a promising electromagnetic absorption performance both in intensity and bandwidth. An optimal reflection loss value of −44.76 dB is achieved, and the effective bandwidth (reflection loss lower than −10 dB) is as large as 6.56 GHz. Furthermore, a composite only loaded with 5 wt % Co/C@PPy also achieves an effective bandwidth of 5.20 GHz, which is even better than numerous reported electromagnetic absorption (EA) materials. The result reveals that the as-fabricated Co/C@PPy—with high absorption intensity, broad bandwidth, and light weight properties—can be utilized as a competitive absorber.

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A self-assembly method for the fabrication of a three-dimensional (3D) polypyrrole (PPy)/poly(3,4-ethylenedioxythiophene) (PEDOT) hybrid composite with excellent absorption performance against electromagnetic pollution

Abstract: Here we report the synthesis and characterization of a 3D-PPy/PEDOT composite, and examine its electromagnetic absorption (AE) performance.

Cited by 52 publications

References 54 publications

Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption

Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption

Attenuated Glial Reactivity on Topographically Functionalized Poly(3,4‐Ethylenedioxythiophene):P‐Toluene Sulfonate (PEDOT:PTS) Neuroelectrodes Fabricated by Microimprint Lithography

Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption

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A self-assembly method for the fabrication of a three-dimensional (3D) polypyrrole (PPy)/poly(3,4-ethylenedioxythiophene) (PEDOT) hybrid composite with excellent absorption performance against electromagnetic pollution

Abstract: Here we report the synthesis and characterization of a 3D-PPy/PEDOT composite, and examine its electromagnetic absorption (AE) performance.

Cited by 52 publications

References 54 publications

Boosted Interfacial Polarization from Multishell TiO2@Fe3O4@PPy Heterojunction for Enhanced Microwave Absorption

Boosted Interfacial Polarization from Multishell TiO2@Fe3O4@PPy Heterojunction for Enhanced Microwave Absorption

Attenuated Glial Reactivity on Topographically Functionalized Poly(3,4‐Ethylenedioxythiophene):P‐Toluene Sulfonate (PEDOT:PTS) Neuroelectrodes Fabricated by Microimprint Lithography

Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption

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Product

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Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption

Boosted Interfacial Polarization from Multishell TiO₂@Fe₃O₄@PPy Heterojunction for Enhanced Microwave Absorption