Interpretation of Raman spectra of disordered and amorphous carbon
Interpretation of Raman spectra of disordered and amorphous carbon
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DOI：
10.1103/physrevb.61.14095
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发表时间：
2000-05-15
影响因子：
3.7
通讯作者：
Robertson, J
中科院分区：
文献类型：
--
作者：
Ferrari, AC;Robertson, J
给出了无序碳和无定形碳中拉曼光谱的模型和理论认识。从π态的共振激发和π键的长程极化率两个方面分析了石墨中G和D振动模的性质。无序，无定形和金刚石状碳的可见拉曼数据被分类在一个三阶段的模型中，以显示控制G和D峰的位置，强度和宽度的因素。结果表明，可见拉曼光谱形式上依赖于sp（2）键簇中sp（2）位的构型。在sp（2）簇由sp（3）分数控制的情况下，例如在沉积的四面体非晶碳（ta-C）或氢化非晶碳（a-C：H）膜中，可见拉曼参数可用于导出sp（3）分数。
The model and theoretical understanding of the Raman spectra in disordered and amorphous carbon are given. The nature of the G and D vibration modes in graphite is analyzed in terms of the resonant excitation of pi states and the long-range polarizability of pi bonding. Visible Raman data on disordered, amorphous, and diamond like carbon are classified in a three-stage model to show the factors that control the position, intensity, and widths of the G and D peaks. It is shown that the visible Raman spectra depend formally on the configuration of the sp(2) sites in sp(2)-bonded clusters. In cases where the sp(2) clustering is controlled by the sp(3) fraction, such as in as-deposited tetrahedral amorphous carbon (ta-C) or hydrogenated amorphous carbon (a-C:H) films, the visible Raman parameters can be used to derive the sp(3) fraction.