Scanning tunneling microscope (STM) was used to characterize the surface topography of Polyacrylonitrile (PAN) based carbon fibers before and after electrochemical treatment.

• 用扫描隧道显微镜对经过电化学腐蚀前后的聚丙烯腈基碳纤维分别进行了观测分析，发现了一种有趣的螺旋结构。