When the magnetite suspension solution was used as catalyst, crystalline bamboo-structured CNTs were obtained. Y junction CNTs were also obtained under ambient condition.

• 当使用磁铁矿悬浮液作为催化剂时，得到结晶性良好之竹节状奈米碳管。而在适当条件下，可得到Y接点奈米碳管。