Core–shell polypyrrole nanoparticles obtained by atmospheric pressure plasma polymerization |
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| Authors: | Miguelina Vasquez‐Ortega Mauricio Ortega Juan Morales M Guadalupe Olayo Guillermo J Cruz Roberto Olayo |
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| Affiliation: | 1. Departamento de Ingeniería Eléctrica, Sección de Electrónica del Estado Sólido, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, , San Pedro Zacatenco, CP 07360 DF, México;2. Departamento de Física, área de Polímeros, Universidad Autónoma Metropolitana, Unidad Iztapalapa, , Vicentina, CP 09340 DF, México;3. Departamento de Física, Instituto Nacional de Investigaciones Nucleares, , CP 52750 México |
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| Abstract: | Polypyrrole hollow nanoparticles were prepared by atmospheric pressure plasma polymerization. The structure of the nanoparticles was studied using Fourier transform infrared and X‐ray photoelectron spectroscopies, thermogravimetric analysis, scanning and transmission electron microscopies and atomic force microscopy. In contrast to low‐pressure plasma polymerization of pyrrole, which can produce films and solid nanoparticles, we obtained two types of hollow nanoparticles: a fraction with single spherical core and another with a core composed of small bubbles. Thermal characterization allowed us to determine that the nanoparticles are composed of highly crosslinked polymer. A mechanism that explains the formation of both types of hollow nanoparticles as well as solid nanoparticles is proposed. Chemical characterization shows that, in addition to the expected chemical structures due to pyrrole polymerization, the high energy of the plasma at atmospheric pressure produces intense dehydrogenation and oxidation processes. The fluorescence spectrum of the nanoparticles, however, shows a peak at 482 nm indicating that some degree of π‐conjugation is present in the material. © 2014 Society of Chemical Industry |
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| Keywords: | core– shell plasma polymerization nanoparticles fluorescence polypyrrole |
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