Title :
Comparison of the growth and field emission characteristics of carbon nanotube grown by Fe/Ti and Co/Ti bi-layered catalysts
Author :
Juan, Chuan-Ping ; Lin, Jun-Han
Author_Institution :
Dept. of Electron. Eng., St. John´´s Univ., Taipei, Taiwan
Abstract :
In this paper, Fe/Ti and Co/Ti bi-layered catalysts were used to study the growth and field emission characteristics of carbon nanotubes(CNTs). Nanoparticles of Co/Ti bi-layered catalyst are uniform in size and smaller than those from Fe/Ti bi-layered catalyst. Well graphite structure of CNTs grown by Fe/Ti and Co/Ti bi-layered catalysts were confirmed by TEM and Raman analyses. Besides, CNTs grown by Co/Ti catalyst show better field emission image uniformity and stability than that by Fe/Ti catalyst. Besides, the turn-on fields of CNTs Grown by Fe/Ti and Co/Ti bi-layered catalysts were about the same (1.6 V/μm for Co case and 1.9V/μm for Fe case). The field emission current density at 6.667V/μm achieved 678.2A/cm2 and 730.7 mA/cm2 for Fe/Ti and Co/Ti bi-layered catalysts, respectively.
Keywords :
carbon nanotubes; field emission; nanoparticles; Co-Ti; Co-Ti bilayered catalyst; Fe-Ti; Fe-Ti bilayered catalyst; Raman analysis; TEM; carbon nanotube; field emission image uniformity; nanoparticles; well graphite structure; Atmospheric measurements; Carbon nanotubes; Current density; Iron; Nanoparticles; Stability analysis; bi-layered catalyst; carbon nanotubes; pillar arrays;
Conference_Titel :
Nanoelectronics Conference (INEC), 2011 IEEE 4th International
Conference_Location :
Tao-Yuan
Print_ISBN :
978-1-4577-0379-9
Electronic_ISBN :
2159-3523
DOI :
10.1109/INEC.2011.5991772
