论文标题
SP2无定形碳的拉曼光谱的石墨烯域特征
Graphene Domain Signature of Raman Spectra of sp2 Amorphous Carbons
论文作者
论文摘要
该论文介绍了SP2无定形碳的拉曼光谱以及其非态性的性质和类型。后者归因于强制碎片。这些碎片是圆周上带有杂原子项链的大小限制石墨烯结构域，是固体的基本结构单位（BSU），确定它们为具有分子结构的非态度。多环芳烃，SP2无定形碳，石墨烯和/或石墨晶体的拉曼光谱的标准G-D-2D模式归因于BSUS石墨烯域。该分子近似允许将单音光谱的G-d光谱图像与石墨烯域内的C = C键长的相当分散，由大小，BSUS的杂原子项链以及BSUS堆积。 2d两次光谱的解释揭示了电气非谐度在光谱形成中的特殊作用，并将这种效应归因于石墨烯域中的高度电子密度离域化。
The paper presents a joint consideration of Raman spectra of sp2 amorphous carbons alongside with the nature and type of their amorphicity. The latter was attributed to the enforced fragmentation. The fragments, presented with size-restricted graphene domains with heteroatom necklaces in the circumference, are the basic structural units (BSUs) of the solids, determining them as amorphics with molecular structure. The standard G-D-2D pattern of Raman spectra of polycyclic aromatic hydrocarbons, sp2 amorphous carbons, graphene and/or graphite crystal is attributed to BSUs graphene domains. The molecular approximation allows connecting the G-D spectra image of one-phonon spectra with a considerable dispersion of the C=C bond lengths within graphene domains, governed by size, heteroatom necklace of BSUs as well as BSUs packing. The interpretation of 2D two-phonon spectra reveals a particular role of electrical anharmonicity in the spectra formation and attributes this effect to a high degree of the electron density delocalization in graphene domains.
