Study of nano-scale surface modification processes induced by slow highly charged ion collisions

研究了在高取向热解石墨（HOPG）表面缓慢高电荷离子碰撞诱导的纳米级表面改性过程。随着入射离子势能的增大，离子所引起的丘的直径也随之增大。在Bi70+和Bi75+之间，诱导修饰的形状由丘状变为破火山口状。在梯度入射实验中，我们观察到有趣的表面修饰是不对称丘和由入射离子引起的几个丘。

We have studied about nano-scale surface modification processes induced by slow highly charged ion collisions on highly oriented pyrolytic graphite (HOPG). The diameter of hillock induced by an ion increases with increasing potential energy of incident ions. The shape of induced modifications has changed from a hillock-like to a caldera-like between Bi70+ and Bi75+. In gradient incidence experiments, we observed interesting surface modifications that are asymmetric hillocks and several hillocks induced by an incident ion.