Effects of CNT density variation in field emission model of ionization gas sensor

Mahmood, Salman and Burhanudin, Zainal Arif and Hamid, Nor Hisham (2011) Effects of CNT density variation in field emission model of ionization gas sensor. In: IEEE Regional Symposium on Micro and Nanoelectronics (RSM), 2011, 28-30 Sep. 2011, Kota Kinabalu, Malaysia.

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A new model to study the gas detection mechanism of carbon nanotube (CNT) based ionization gas sensor has been developed. The model incorporates electron field emission property of the CNTs. The CNT density and aspect ratio variations which are major factors involved in the field emission are also included. The CNT field emission is controlled with density and aspect ratio parameters in the model. The model is then embedded in the standard Particle-In-Cell / Monte-Carlo-Collision (PIC-MCC) codes. With the help of these enhanced PIC-MCC codes the simulation of gas breakdown behaviour with CNT field emission and density variation effects become possible for the first time. From the simulations, it is observed that the electrostatic screening effects are reduced and the field emission is high for the moderate CNT density on the electrode.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE:Research Institutes > Institute for Autonomous Systems
ID Code:8410
Deposited By: Dr Zainal Arif Burhanudin
Deposited On:22 Nov 2012 02:56
Last Modified:28 Mar 2014 06:16

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