8-9th August, 2008 School of Materials Science & Nanotechnology,Jadavpur University
PREPARATION OF MULTIWALLED CARBON NANOTUBES BY A NOVEL CATALYST ROUTE AND ITS FIELD EMISSION PROPERTY
D. BANERJEE a, K.K. Chattopadhyay a,b,*
a Thin Film & Nanoscience Laboratory, Department of Physics,
b Nanoscience and Technology Center
Jadavpur University, Kolkata 700 032, India
E-mail: kalian_chattopadhya @yahoo.com
Abstract
The possibilities of low macroscopic field emission from carbon based film such as amorphous carbon, diamond like carbon, carbon nanotube and nanofiber has made them the candidate of extreme interest during last decade. Specially since the discovery of carbon nanotube by Iijima apart from field emission it shows its importance in a number of other scientific field such as drug delivery agent, adsorption agent, energy storage device etc. There are number of techniques for the preparation of carbon nanotubes. Here in this paper preparation of carbon nanotube by Plasma Enhanced Chemical Vapour Deposition [PECVD] through an easy catalyst method has been reported. The as prepared carbon nanotubes show an excellent field emission property with turn on field as low as 1.96V/μm and effective work function 0.039eV. The straight line nature of F-N plot tells that the electrons are emitted mainly due to field emission process. The turn on field varying in the range between 4.24 V/μm -1.96 V/μm with inter electrode distance varying between 150μm -220μm is mainly due to variation of local nanostructure. The field enhancement factor, current density and dependence of effective work function on interelectrode distance have been calculated. This simple catalyst method may helps producing carbon nano tube in large scale.
Corresponding author:
Diptonil Banerjee.
E-mail: nilju82 @gmail.com
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