Possible Origin of D- and G-band Features in Raman Spectra of Tribofilms
Possible Origin of D- and G-band Features in Raman Spectra of Tribofilms
复制标题
DOI：
10.1007/s11249-023-01728-1
复制
发表时间：
2023-06-01
影响因子：
3.2
通讯作者：
Kim, Seong H.
中科院分区：
文献类型：
--
作者：
Li, Yu-Sheng;Jang, Seokhoon;Kim, Seong H.
在由有机前驱体制备的摩擦膜的拉曼分析中，经常观察到D-和G-带特征，其类似于类金刚石碳（DLC）、无定形碳（a-C）或石墨材料的特征带。本研究报告的实验证据表明，D-和G-带功能的拉曼光谱的摩擦膜可以产生的光化学降解的摩擦产品由于激光束的聚焦照射在拉曼分析，表明它们不是唯一的摩擦膜通过摩擦产生的真正的结构。这一发现表明，需要其他的补充和非破坏性的表征，以确定是否DLC，a-C，或石墨物种摩擦化学产生的摩擦剪切。
In the Raman analysis of tribofilms produced from organic precursors, the D- and G-band features are often observed, which resemble the characteristic bands of diamond-like carbon (DLC), amorphous carbon (a-C), or graphitic materials. This study reports experimental evidence that the D- and G-bands features in the Raman spectra of tribofilms could be generated by photochemical degradation of triboproducts due to the focused irradiation of laser beam during the Raman analysis, indicating that they are not unique to the genuine structure of the tribofilm produced via friction. This finding suggests that other complementary and non-destructive characterization is required to determine whether DLC, a-C, or graphitic species are produced tribochemically by frictional shear.