激光功率对连续CO_2激光制备单壁碳纳米管的影响

Influence of Laser Power on the Preparation of Single-Walled Carbon Nanotubes Using CO_2 Continuous Laser

在室温下用大功率连续CO2 激光制备单壁碳纳米管 ,测量了 5 0 0～ 85 0W激光功率下产生的碳纳米管样品的透射电镜和拉曼 (Raman)光谱 ,对单壁碳纳米管的生长条件和直径分布与激光功率的关系进行了研究 ,实验证明在长波长激光制备单壁碳纳米管中 ,激光功率对单壁碳纳米管的形成和管径的大小起着关键的作用。激光功率越高 ,单壁碳纳米管的产率越大。对不同管径的单壁碳纳米管 。

Single-walled carbon nanotubes (SWNTs) were prepared by continuous CO_2 laser ablation at room temperature. Transmission electron microscope (TEM) and Raman spectrum of SWNTs samples prepared by laser with power from 500 W to 850 W were measured. It gave the dependence of growth condition and tube diameter on laser power, and confirmed that laser power play a crucial role in SWNTs formation and tube diameter distribution in the preparation method of long wavelength laser ablation. The yield of SWNTs increases with increasing CO_2 laser power. On the other hand, the higher the laser power, the larger the tube diameter of SWNTs in experiments.