论文部分内容阅读
研究了单根(7,5)蛇形单壁碳纳米管的拉曼光谱特征,观察到了环呼吸振动峰(RBM)、环呼吸振动的倍频峰(2RBM)、介于中间频率的振动峰(IMF)、无规振动峰(D)、剪切振动峰(G)、中间频率振动峰(M)、剪切振动和环呼吸振动的和频峰(G+RBM)、面内横向光学声子和纵向声学声子的和频峰(iTOLA)、无规振动的二次共振峰(G′或者2D)以及其它一些归属不清楚的拉曼峰.不同激发波长和不同激发偏振拉曼光谱研究表明,这些拉曼光谱峰显示出了非常强的激发能量和激发偏振的选择性.
The Raman spectra of single-walled (7,5) serpentine single-walled carbon nanotubes (MWCNTs) were investigated. The ringing respiration peak (RBM), ringing respiration doubler peak (2RBM), vibrational peak (IMF), random vibration peak (D), shear vibration peak (G), mid-frequency vibration peak (M), shear vibration and ring respiratory vibration sum frequency peak (G + RBM) The sum-frequency peak (iTOLA) for sub-and longitudinal acoustic phonons, the secondary resonance peak (G ’or 2D) for random vibration, and other unclear Raman peaks. Raman spectra of different excitation wavelengths and different excitation polarizations Show that these Raman peaks show a very strong excitation energy and excitation polarization selectivity.