“…Numerous investigators have reported CNTs, its development of commercial applications such as scanning probes [2], field emission display (FED) [3], anode for lithium ion batteries [4], nanoelectronic devices [5], supercapacitors [6], molecular sensors [7], and hydrogen storages [8] have been stimulated tremendously. Several methods, including arc-discharge [9], chemical vapor deposition (CVD) with [10][11][12] or without plasma enhancement [13,14], and laser ablation [15], have been used for the growth of CNTs in the presence of the catalyst. For CVD process, CNTs can directly grow on the predefined catalyst layer, and have high yield and uniformity [16].…”