Synthesis of polypyrrole microspheres by Streptomyces spp.

Stirkė, Arūnas; Apetrei, Roxana-Mihaela; Kirsnytė, Monika; Dedelaite, Lina; Bondarenka, V.; Jasulaitienė, Vitalija; Pučetaitė, Milda; Selskis, A.; Cârâc, Geta; Bahrim, Gabriela; Ramanavičius, Arūnas

doi:10.1016/j.polymer.2015.12.029

Cited by 29 publications

(18 citation statements)

References 30 publications

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“…were attributed to stretching vibrations of the pyrrole ring e.g. the combination of C=C and C-C stretching vibrations; furthermore, the bands at 1050 and 1200 cm -1 can be ascribed to C-H deformation vibrations and C-N stretching vibrations, respectively; and the band at 922 cm -1 is assigned to C=C in-plane bending vibrations of the pyrrole ring [14][15][16]. As seen in Fig.…”

Section: Resultsmentioning

confidence: 90%

Optimizing the Polymerization Conditions of Conductive Polypyrrole

Song

Han

et al. 2016

J. Photopol. Sci. Technol.

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Nanostructured polypyrrole (PPy) was successfully prepared via template-free emulsion polymerization method. In this paper, we discuss the influence of polymerization conditions such as the types of doping agent, the reaction time, the reaction temperature, the types of oxidant, and the oxidant-pyrrole molar ratio on the yield and resistance of doped PPy. The results revealed that these factors had an important effect on yield and resistance properties of the doped PPy. When synthesized under the optimal reaction condition at 0 o C, the yield and resistance of the doped PPy were 66% and 0.12 Ω, respectively. In addition, the crystallinity, chemical structure and morphology of the doped nanostructured PPy under the optimal polymerization condition and the undoped PPy were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscope. The results demonstrated that doped polypyrrole has the morphology of interconnected spherical structure and higher crystallinity.

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Section: Resultsmentioning

confidence: 90%

Optimizing the Polymerization Conditions of Conductive Polypyrrole

Song

Han

et al. 2016

J. Photopol. Sci. Technol.

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“…Apart from the peaks for C, Cl, and O elements, both of top and bottom sides exhibit the pronounced N 1s peaks. As shown in Figure i, the two typical peaks at ≈400 and 401 eV belong to the pyrrolyl nitrogen (NH structure) and the positively charged nitrogen (NH +  structure), respectively …”

Section: Resultsmentioning

confidence: 99%

Vapor‐Activated Power Generation on Conductive Polymer

Xue

Zhao

et al. 2016

Adv Funct Materials

117

110

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wileyonlinelibrary.comconversion that only relies on the ambient spontaneous moisture diffusion process greatly avoids the disturbances (e.g., thermal, mechanical variation, and so on) from the environment, which is of significance for the future high stable electric power supply. Therefore, to further satisfy the increasing demands for electric power, the effort on exploring and researching new versatile candidates (not just limited in a single less-conductive material, such as GO) for various vapor-electric energy generation is urgent, which has been absent so far yet.Conducting polymers have attracted numerous attention in the applications of actuators, sensors, batteries, supercapacitors, and electrochromic devices due to their predominant mechanical, optical, redox, and electrical properties. [12][13][14][15] In particular, polypyrrole (PPy) has been widely studied in energy conversion fields because of its significant advantages of easy synthesis, wide range of dopant species, and relatively good environmental stability. [16] For instance, PPys can act as a kind of hygroscopic material to capture the moisture from the ambient environment, [15,17,18] where its dominant ionic conductivity enhances with the increase of relative humidity (RH). Furthermore, PPys could promote the conversion of electrical to mechanical energy in the form of actuation behaviors induced by the volume change resulting from a Faradaic doping and undoping process. [19] Meanwhile, the doped and undoped anions lead to different conducting states of PPy, in which the energy gap reduces from 4 to ≤2.5 eV according to the state from undoped (neutral) to doped (oxidation). [20,21] The reversible switching process between the doped (oxidized) state and undoped (neutral) state of PPy can be controlled by changing the electrical potential as well as the doping level. [22] These results indicate the strong interactions of PPy and doped anions to tune the functions of PPy-based devices that provide the opportunities for developing new generation energy-converting systems.In this work, we have developed a high-performance vaporactivated power generator (VaPG) based on a 3D PPy framework with a preformed anion gradient (named as gradient 3D PPy, g-3D-PPy). The g-3D-PPy was formed by electrolyte/electric field coinduced by the gradient process of anions doped in the 3D PPy framework containing LiClO 4 aqueous solution (this strategy here is called electrolyte-electric annealing, EeA process). [10,22] Upon exposure to the water vapor, the open porous network can greatly facilitate the diffusion of water molecules, and meanwhile the anion-containing gradient provides free ionic gradient to promote the spontaneous transport An efficient vapor-activated power generator based on a 3D polypyrrole (PPy) framework was demonstrated for the first time. By constructing the anions gradient in the PPy, this specially designed PPy framework provided free ionic gradient with the assistant of absorbing water vapor to promote the spontaneous transport of ionic char...

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“…Recently, our research team applied whole microorganisms for the synthesis of conducting polymer polypyrrole. In the initial research, which has reported bacteria-assisted synthesis of polypyrrole, we used bacterial cells Streptomyces spp., which produce some phenol-oxidases; therefore, these enzymes are able to perform polymerization of pyrrole by forming Ppy-based hollow Ppy microspheres [ 44 ]. In another research, we applied living cell induced redox cycling of [Fe(CN) 6 ] 4− /[Fe(CN) 6 ] 3− , which enabled the formation of polypyrrole within the yeast cell wall [ 45 ].…”

Section: Formation Of Conducting Polymer-based Sensing Structuresmentioning

confidence: 99%

Conducting Polymers in the Design of Biosensors and Biofuel Cells

2020

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Fast and sensitive determination of biologically active compounds is very important in biomedical diagnostics, the food and beverage industry, and environmental analysis. In this review, the most promising directions in analytical application of conducting polymers (CPs) are outlined. Up to now polyaniline, polypyrrole, polythiophene, and poly(3,4-ethylenedioxythiophene) are the most frequently used CPs in the design of sensors and biosensors; therefore, in this review, main attention is paid to these conducting polymers. The most popular polymerization methods applied for the formation of conducting polymer layers are discussed. The applicability of polypyrrole-based functional layers in the design of electrochemical biosensors and biofuel cells is highlighted. Some signal transduction mechanisms in CP-based sensors and biosensors are discussed. Biocompatibility-related aspects of some conducting polymers are overviewed and some insights into the application of CP-based coatings for the design of implantable sensors and biofuel cells are addressed. New trends and perspectives in the development of sensors based on CPs and their composites with other materials are discussed.

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Synthesis of polypyrrole microspheres by Streptomyces spp.

Cited by 29 publications

References 30 publications

Optimizing the Polymerization Conditions of Conductive Polypyrrole

Optimizing the Polymerization Conditions of Conductive Polypyrrole

Vapor‐Activated Power Generation on Conductive Polymer

Conducting Polymers in the Design of Biosensors and Biofuel Cells

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