Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust.
Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust.
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DOI：
10.1021/acsami.0c19758
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发表时间：
2021-01-20
影响因子：
9.5
通讯作者：
Armes SP
中科院分区：
文献类型：
--
作者：
Chan DH;Millet A;Fisher CR;Price MC;Burchell MJ;Armes SP
多环芳烃（PAH）在整个宇宙中都有发现。这些有机分子的普遍存在意味着它们在宇宙尘埃的背景下具有相当大的兴趣，宇宙尘埃通常以超高速（>1 km s-1）在我们的太阳系内移动。然而，在实验室实验中研究这种快速移动的微米级颗粒需要合适的合成模拟物。在这里，我们使用球磨来生产蒽的微粒，蒽是PAH家族中最简单的成员。尺寸控制可以通过在合适的阴离子商业聚合物分散剂（Morwet D-425）存在下改变研磨时间来实现。这些蒽微粒然后用聚吡咯（PPy）的薄覆盖层涂覆，聚吡咯（PPy）是空气稳定的有机导电聚合物。采用光学显微镜、扫描电子显微镜、激光衍射、水性电泳、FT-IR光谱、拉曼显微镜和X射线光电子能谱（XPS）对未涂覆和PPy涂覆的蒽微粒的粒径、表面形态和化学结构进行表征。此外，这种微粒可以使用轻气枪加速到超高速。最后，对撞击坑的研究表明存在碳碎片，因此它们有望成为第一个合成的模拟PAH基宇宙尘埃的物质。
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.
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DOI：
10.1016/s0927-7757(01)00505-2
发表时间：
2001-07-15
影响因子：
5.2
作者：
Haas, S;Hässlin, HW;Schlatter, C
通讯作者：
Schlatter, C
影响因子：
4.4
作者：
FURUKAWA, Y;TAZAWA, S;HARADA, I
通讯作者：
HARADA, I
影响因子：
9.9
作者：
Han, MG;Armes, SP
通讯作者：
Armes, SP
影响因子：
4.4
作者：
ARMES, SP
通讯作者：
ARMES, SP
影响因子：
2.4
作者：
Burchell, MJ;Willis, MJ;Perruchot, C
通讯作者：
Perruchot, C