Ulster University Logo

Ulster Institutional Repository

Field emission effects of nitrogenated carbon nanotubes on chlorination and oxidation

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Ray, SC, Palnitkar, U, Pao, CW, Tsai, HM, Pong, WF, Lin, IN, Papakonstantinou, P, Ganguly, A, Chen, LC and Chen, KH (2008) Field emission effects of nitrogenated carbon nanotubes on chlorination and oxidation. JOURNAL OF APPLIED PHYSICS, 104 (6). 063710. [Journal article]

[img]
Preview
PDF
484Kb

DOI: 10.1063/1.2981090

Abstract

With reference to our recent reports [Appl. Phys. Lett. 90, 192107 (2007); Appl. Phys. Lett. 91, 202102 (2007)] about the electronic structure of chlorine treated and oxygen-plasma treated nitrogenatcd carbon nanotubes (N-CNTs), here we studied the electron field emission effects on chlorination (N-CNT:Cl) and oxidation (N-CNT:O) of N-CNT. A high current density (J) of 15.0 mA/cm(2) has been achieved on chlorination, whereas low J of 0.0052 mA/cm(2) is observed on oxidation compared to J=1.3 mA/cm(2) for untreated N-CNT at an applied electric field E-A of similar to 1.9 V/mu m. The turn-on electric field (E-TO) was similar to 0.875. The 1.25 V/mu m was achieved for N-CNT:C1 and N-CNT:O, respectively, with respect to E-TO= 1.0 V/mu n for untreated one. These findings are due to the formation of different bonds with carbon and nitrogen in the N-CNT during the process of chlorine (oxygen)-plasma treatment by the charge transfer, or else that changes the density of free charge carriers and hence enhances (reduces) the field emission properties of N-CNTs:C1 (N-CNTs:O). (C) 2008 American Institute of Physics. [DOI: 10. 1063/1.2981090]

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:6394
Deposited By:Professor Pagona Papakonstantinou
Deposited On:13 Jan 2010 09:53
Last Modified:18 Aug 2011 11:56

Repository Staff Only: item control page