Most notably, a permanent hollow hole with a high aspect ratio will be produced on the copper substrate, while copper atoms in close proximity to the hole are only slightly disordered.

• 利用较短的单壁奈米碳管对铜基板进行深孔加工后，会在铜基板上产生明显的中空孔洞，而孔洞周围的结构只受到非常轻微的影响。