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采用拉曼光谱仪、透射电镜、俄歇能谱仪、X射线光电子能谱仪等研究在Si O2/Si基底上化学沉积的多壁碳纳米管(MWCNTs)经390℃的空气中热处理120 min前后与HCl溶液化学处理前后的结构变化情况。拉曼光谱集中测试低频(250-300 cm-1)带。结果表明,经热处理和化学处理后,在250-300 cm-1形成的拉曼带在峰位和半宽几乎没变。由透射电镜可知,小直径碳纳米管的内径值与拉曼光谱测试结果一致。这些结果表明,低频带产生于小直径碳纳米管的内壁中碳原子的径向呼吸振动。
Multiwalled carbon nanotubes (MWCNTs) were chemically deposited on Si O2 / Si substrates by heat treatment in air at 390 ° C for 120 min using Raman spectroscopy, transmission electron microscopy, Auger spectroscopy, X-ray photoelectron spectroscopy, And HCl solution chemical treatment before and after the structural changes. Raman spectroscopy focuses on low-frequency (250-300 cm-1) bands. The results show that Raman bands formed at 250-300 cm-1 hardly change at the peak position and half-width after heat treatment and chemical treatment. By transmission electron microscopy, small diameter carbon nanotube diameter and Raman spectroscopy results agree. These results show that the low frequency band results from the radial respiratory vibrations of carbon atoms in the inner wall of small diameter carbon nanotubes.