Ultrafast carbon nanotube growth by microwave irradiation

Carbon nanotubes (CNTs) have been rapidly synthesized in 20–40s through a one-step microwave heating method. Copper wire, molybdenum wire, iron wire and steel fiber were respectively mixed with ferrocene to achieve the fast growth of CNTs at room temperature in air with the aid of a domestic microwave oven. Copper wire, molybdenum wire, iron wire and steel fiber were applied to initiate the pyrolysis of ferrocene for inducing CNT growth. Scanning electron microscopy (SEM) results show that CNTs with varied morphologies and features were obtained when varied metal materials were used. High-resolution transmission electron microscopy (HRTEM) images show well-developed graphitic sheets of the as-grown CNTs, and thermogravimetric results revealed the CNT's high purity. This study provides a facile and ultrafast method for CNTs growth in ambient conditions without any inert gas protection.