Carbon Onions as Possible Carriers of the 2175 Å Interstellar Absorption Bump
Carbon Onions as Possible Carriers of the 2175 Å Interstellar Absorption Bump
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碳洋葱作为 2175 Å 星际吸收凹凸的可能载体
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
A. Lucas
中科院分区：
文献类型：
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作者：
L. Henrard;P. Lambin;A. Lucas
我们研究了各种空心和填充的球形多壳层富勒烯(俗称碳洋葱)在碳π-等离子体激元激发的波长范围内的紫外(UV)光学响应。我们的理论方法遵循最近提出的生长模型，允许我们研究填充内腔的材料(例如钻石)和涂层(例如水)对这些团簇电子性质的影响。我们发现包覆的洋葱颗粒具有与UV星际尘埃吸收数据一致的光学性质，包括与共振宽度变化很大相关的吸收极大值的恒定位置。
We have studied the ultraviolet (UV) optical response of various hollow and filled spherical multishell fullerenes (commonly called carbon onions) in the wavelength region of the carbon π-plasmon excitation. Our theoretical approach, which follows a recently proposed growth model, allowed us to investigate the modification of the electronic properties of these clusters brought about by a material (for example, diamond) filling the inner cavity and by a coating layer (for example, water). We found that coated onion particles have optical properties consistent with the UV interstellar dust absorption data, including the constant position of the absorption maximum associated with a large variation of the resonance width.