Title :
Charactrization of ultra-low temperature growth of multi-walled carbon nanotubes on glass substrate for field emission applications
Author :
Zandi, Ashkan ; Khatami, S. ; Niknam, Sh ; Tabatabaei, M.K. ; Fard, H. Ghafoori ; Koohsorkhi, J.
Author_Institution :
Dept. of Electr. Eng., Amirkabir Univ. of Technol., Tehran, Iran
Abstract :
This article presents a novel method for growing multi walled carbon nanotubes (MWCNTs). The proposed method includes use of long zone (long distance between the anode and cathode electrodes) DC-PECVD at an ultra-low temperature. Through this method, the growth of vertically aligned CNTs (VACNT) with high aspect ratio at temperatures as low as 250°C was achieved. This method is based on M. K. Tabatabaei et al paper entitled “Remote and direct plasma regions for low-temperature growth of carbon nanotubes on glass substrates for display applications”. Simulation results proved thermal gradient along the reaction chamber used for low temperature growth. The structure and the properties of the grown CNTs were investigated using scanning electron microscopy and Raman spectroscopy. Also the electron field emission current was measured for CNTs with different diameters. As a catalyst, a thin layer (15 nm) of Ni was deposited on Indium Tin Oxide/glass substrate. Hydrogen and Acetylene were used as feed gases. Low temperature growth of VACNTs is suitable for low cost productions which enables use of low temperature substrates such as plastics and glass.
Keywords :
Raman spectra; catalysts; electrochemical electrodes; electron field emission; metallic thin films; multi-wall carbon nanotubes; nanofabrication; nickel; plasma CVD; scanning electron microscopy; C; DC-PECVD; ITO-SiO2; Raman spectroscopy; aspect ratio; catalyst; electron field emission current; glass substrate; glass substrates; multi-walled carbon nanotubes; reaction chamber; scanning electron microscopy; thermal gradient; thin layer; ultra-low temperature growth; vertically aligned CNT; Anodes; Carbon nanotubes; Cathodes; Plasma temperature; Substrates; Active radicals; Long zone DC-PECVD; Low temperature growth; Vertically aligned carbon nanotubes;
Conference_Titel :
Electrical Engineering (ICEE), 2014 22nd Iranian Conference on
Conference_Location :
Tehran
DOI :
10.1109/IranianCEE.2014.6999555