Enhancement of field emission from multistage structure of carbon nanotube arrays
Document Type
Thesis
Degree
Master of Science (MS)
Major/Program
Mechanical Engineering
First Advisor's Name
Wonbong Choi
First Advisor's Committee Title
Committee Chair
Second Advisor's Name
Kinzy W Jones
Third Advisor's Name
Arvind Agarwal
Date of Defense
7-19-2007
Abstract
The field emission measurements for the multistage structured nanotubes (i.e., thin-multiwall and single wall carbon nanotubes grown on multiwall carbon nanotubes) were carried out and a low turn-on field of ~0.45 V/ μm, high emission current of 450 μA at a field of IV/μm and a large field enhancement factor of ~26200 were obtained. The thin multiwall carbon nanotubes (thin-MWNTs) and single wall carbon nanotubes (SWNTs) were grown on the regular arrays of vertically aligned multi wall carbon nanotubes (MWNTs) on porous silicon substrate by Chemical Vapor Deposition (CVD) method. The thin-MWNTs and SWNTs grown on MWNTs in this way have a multistage structure which gives higher enhancement of the electric field and hence the electron field emission.
Identifier
FI14051177
Recommended Citation
Boddepalli, Srinivasarao, "Enhancement of field emission from multistage structure of carbon nanotube arrays" (2007). FIU Electronic Theses and Dissertations. 1708.
https://digitalcommons.fiu.edu/etd/1708
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