Synthesis and characterization of polypyrrole-coated anthracene microparticles: a new synthetic mimic for polyaromatic hydrocarbon-based cosmic dust
| Autor: | Arthur Millet, Mark J. Burchell, Callum R. Fisher, Mark C. Price, Steven P. Armes, Derek H. H. Chan |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Context (language use) 010502 geochemistry & geophysics Polypyrrole 01 natural sciences symbols.namesake chemistry.chemical_compound hypervelocity impacts X-ray photoelectron spectroscopy polypyrrole 0103 physical sciences General Materials Science QD 010303 astronomy & astrophysics conducting polymers 0105 earth and related environmental sciences Cosmic dust QB Conductive polymer microparticles Anthracene polyaromatic hydrocarbons cosmic dust anthracene chemistry Chemical engineering symbols Particle size QB651 space science Raman spectroscopy Research Article |
| Zdroj: | ACS Applied Materials & Interfaces |
| ISSN: | 1944-8244 |
| Popis: | Polyaromatic hydrocarbons (PAHs) are found throughout the universe. The ubiquity of these organic molecules means that they are of considerable interest in the context of cosmic dust, which typically travels at hypervelocities (>1 km s–1) within our solar system. However, studying such fast-moving micrometer-sized particles in laboratory-based experiments requires suitable synthetic mimics. Herein, we use ball-milling to produce microparticles of anthracene, which is the simplest member of the PAH family. Size control can be achieved by varying the milling time in the presence of a suitable anionic commercial polymeric dispersant (Morwet D-425). These anthracene microparticles are then coated with a thin overlayer of polypyrrole (PPy), which is an air-stable organic conducting polymer. The uncoated and PPy-coated anthracene microparticles are characterized in terms of their particle size, surface morphology, and chemical structure using optical microscopy, scanning electron microscopy, laser diffraction, aqueous electrophoresis, FT-IR spectroscopy, Raman microscopy, and X-ray photoelectron spectroscopy (XPS). Moreover, such microparticles can be accelerated up to hypervelocities using a light gas gun. Finally, studies of impact craters indicate carbon debris, so they are expected to serve as the first synthetic mimic for PAH-based cosmic dust. |
| Databáze: | OpenAIRE |
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