Complex carbon nanotube superstructures synthesized with natural mineral catalysts Original Research Article

Complex carbon nanotube (CNT) superstructures have been successfully fabricated through a simple synthesis strategy in which natural minerals containing iron have been treated and then used as catalysts, substrates and templates for the growth of the CNT superstructures. These superstructures were characterized with field emission scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy.