Nanosized carbon-rich grains in carbonaceous chondrite meteorites
Nanosized carbon-rich grains in carbonaceous chondrite meteorites
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碳质球粒陨石中的纳米级富碳颗粒
DOI：
10.1016/j.epsl.2004.05.024
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发表时间：
2004
影响因子：
5.3
通讯作者：
P. Buseck
中科院分区：
文献类型：
--
作者：
L. Garvie;P. Buseck
大分子碳质物质是原始陨石中常见的物质。关于它的形式和组成的信息很少，也没有关于纳米级化学和结构变化的公开数据。CM陨石的透射电子显微镜研究揭示了丰富的、以前未被发现的纳米碳质颗粒。电子能量损失谱(EELS)表明，它们具有很高的芳香族组分，被S、N和O取代了20at.%。它们以离散的中空和固体纳米球和稀疏的纳米管的形式存在。陨石中的颗粒在成分、大小、形态和丰度上都有很大的差异，可能代表着来自多个储集层的物质。
Macromolecular carbonaceous material is common in primitive meteorites. Little information exists on its form and composition, and there are no published data on nanometer-scale chemical and structural variations. Transmission electron microscopy (TEM) studies of CM meteorites reveal abundant, previously unrecognized nanosized carbonaceous grains. They have a high aromatic component as revealed by electron energy-loss spectroscopy (EELS), with up to 20 at.% substituted by S, N, and O. They occur as discrete hollow and solid nanospheres and sparse nanotubes. The grains exhibit considerable variations in composition, size, morphology, and abundance among meteorites and may represent materials from multiple reservoirs.