Carbon nanotubes ( CNTs) grown directly on graphite substrate are fabricated firstly using electrodeposited iron particles by chemical vapor deposition. Most of CNTs have "Y" junction structure. 首次以电沉积铁为催化剂,采用经典化学气相沉积技术在石墨基体上成功实现纳米碳管的直接生长,大部分纳米碳管具有Y形结构。