The Raman spectra of graphene‐based matter exhibit a set of defect/disorder‐induced bands. The D band, which exhibits a strong dispersion up to ~50 cm⁻¹/eV, comes from transverse optical phonons around K or K′ in the first Brillouin zone and involves an intervalley double resonance (DR) Raman process. In the present work, resonant Raman scattering (lines ranging from 1.58 to 3.81 eV) is used to study the unusual behavior of the one‐phonon Raman band of a carbonaceous material (anthracene‐based carbon which is one of the graphitizable carbons) upon its secondary carbonization stage (450°C–1000°C). While the G band appears to be nondispersive, the D band exhibits a change in both position and intensity. Its dispersion progressively rises from ~6 cm⁻¹/eV to values close to what is usually observed in defected graphene‐based systems when anthracene‐based carbon becomes almost pure. This evolution appears to be correlated with a release of hydrogen (fixed on the edges of polyaromatic layers) questioning their role in changing the D band resonance conditions.

中文翻译：

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次级碳化阶段蒽基碳的共振拉曼散射

石墨烯基物质的拉曼光谱显示出一组缺陷/无序带。D波段表现出高达〜50 cm ^-1 / eV的强色散，来自第一布里渊区中K或K'周围的横向光学声子，并涉及音程双共振（DR）拉曼过程。在当前的工作中，共振拉曼散射（范围为1.58至3.81 eV）用于研究碳质材料（蒽基碳，这是一种可石墨化的碳）在其单声子拉曼带上的异常行为。二次碳化阶段（450°C–1000°C）。尽管G波段似乎是非分散的，但D波段的位置和强度都发生了变化。其色散从〜6 cm ^-1逐渐增加/ eV接近于基于蒽的碳几乎纯净时，在基于缺陷的石墨烯系统中通常观察到的值。这种演变似乎与氢的释放（固定在多芳族层的边缘）有关，这质疑了氢在改变D波段共振条件中的作用。