Effects of laser power and substrate on the Raman shift of carbon-nanotube papers
Effects of laser power and substrate on the Raman shift of carbon-nanotube papers
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DOI：
10.1016/j.cartre.2020.100009
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发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Fuqian Yang;Shanshan Wang;Yulin Zhang
中科院分区：
文献类型：
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作者：
Fuqian Yang;Shanshan Wang;Yulin Zhang
碳纳米管结构制备的进展使得利用拉曼光谱测量碳纳米管及其邻接材料的变形状态成为可能。在这项工作中，我们研究了在没有机械加载的情况下，当激光强度在0.071~1.415 kW/mm~2范围内，激光功率和周围材料对碳纳米管纸的拉曼位移的影响。在拉曼测量中使用了两种不同配置的CNT纸；一种是使用悬浮的CNT纸，另一种是将CNT纸放置在玻璃或铝衬底上。实验结果表明，激光功率和接合材料对碳纳米管试纸的D、G、G‘带波数的变化存在联合效应。推导了应变分量、温度与拉曼峰波数变化之间的解析关系，得出了拉曼峰波数变化与激光功率成正比的关系。实验结果支持了这种关系。
The progress in the fabrication of carbon-nanotube-based structures has made it possible to use Raman spectroscopy to measure the deformation states of carbon nanotubes and abutting materials. In this work, we investigate the effects of laser power and surrounding materials on the Raman shift of carbon-nanotube (CNT) papers for the laser intensity in a range of 0.071 to 1.415 kW/mm2without action of mechanical loading. Two different configurations of the CNT papers are used in the Raman measurement; one uses a suspended CNT paper, and the other places a CNT paper on a glass or aluminum substrate. The experimental results reveal that there exist combinational effects of the laser power and abutting materials on the changes of the wavenumbers of the D, G and G′ bands of the CNT papers. We derive an analytical relation between the strain components, temperature and the change of the wavenumber of the Raman peak, which yields a proportional relationship between the change of the wavenumber of the Raman peak and the laser power. Such a relationship is supported by the experimental results.