In this study, in order to easily provide functional groups on the surface of carbon nanotubes, dual structural multiwalled carbon nanotubes which have crystalline graphite and turbostratic carbon wall were synthesized by modified vertical thermal decomposition method. Synthesized dual structural MWCNTs were characterized by FE-SEM, TGA, HR-TEM, Raman spectroscopy and BET specific surface area analyzer. The average innermost and outermost diameters of the synthesized nanotubes were around 45 and 75 nm, respectively. The large empty inner space and the presence of graphitic carbons on the surface may open potential applications for gas storage and collection of hazardous materials.

• Se-Ho Cho(Nano Karbon Inc., Sungkyunkwan University)
• Do-Yoon Kim(Nano Karbon Inc., Sungkyunkwan University)
• Jeong-Ku Heo(Nano Karbon Inc., Sungkyunkwan University)
• Young-Hee Lee(Department of Nanoscience and Nanotechnology, BK21 Physics Division, Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University)
• Kay-Hyeok An(Department of Nanoscience and Nanotechnology, BK21 Physics Division, Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University, Jeonju Machinary Research Center)
• Shin-Dong Kim(Department of Fine Chemical Engineering and Chemistry, Chungnam National University)
• Young-Seak Lee(Department of Fine Chemical Engineering and Chemistry, Chungnam National University)