We investigated the effects of parametric synthesis conditions of catalysts such as sintering temperature, sorts of supports and compositions of catalysts on alignment and length-control of carbon nanotubes (CNTs) using catalyst powders. To obtain aligned CNTs, several parameters were changed such as amount of citric acid, calcination temperature of catalysts, and the sorts of supports using the combustion method as well as to prepare catalyst. CNTs with different lengths were synthesized as portions of molybdenum and iron using a chemical vapor deposition reactor. In this work, the mechanisms of alignment of CNTs and of the length-control of CNTs are discussed.

• Young Soo Park(Department of Polymer-nano Science and Technology, Chonbuk National University, Korea Institute of Carbon Convergence Technology)
• Hyung Suk Moon(AFFC Co.)
• Mongyoung Huh(Korea Institute of Carbon Convergence Technology)
• Byung-Joo Kim(Korea Institute of Carbon Convergence Technology)
• Yun Su Kuk(Korea Institute of Carbon Convergence Technology, Department of Organic Materials and Fiber Engineering, Chonbuk National University)
• Sin Jae Kang(Korea Institute of Carbon Convergence Technology, Department of Mechanical Design Engineering, Chonbuk National University)
• Seong Hee Lee(Department of Polymer-nano Science and Technology, Chonbuk National University)
• Kay Hyeok An(Korea Institute of Carbon Convergence Technology) Corresponding Author