Comparing field emission stability of lithography-free, modified multi-walled carbon nanotubes
Document Type
Article
Publication Date
2009
Department
Department of Physics
Abstract
Field emission from carbon nanotubes (CNTs) has been known for more than a decade but there is no commercialized product available in the market. Apparently, we need to improve our basics understanding on stable field emission from CNTs. Here we compared the field emission properties of as grown vertically-aligned multi-walled carbon nanotubes (MWCNTs) to two types of modified MWCNTs: 1) Conical bundles of opened-tip MWCNTs, and 2) Opened-tip MWCNTs embedded in poly-methyl methacrylate (PMMA). We found that both types of modified MWCNTs have lower emission thresholds and better emission stability than the as grown samples. Among these modified samples, MCNTs embedded in PMMA has lower emission thresholds and better emission stability. We attributed these improvements to the filling of spacing between MWCNTs with PMMA that has higher dielectric constant than vacuum.
Publication Title
MRS Proceedings Online
Recommended Citation
Pandey, A.,
Prasad, A.,
Moscatello, J. P.,
&
Yap, Y. K.
(2009).
Comparing field emission stability of lithography-free, modified multi-walled carbon nanotubes.
MRS Proceedings Online,
1204.
http://doi.org/10.1557/PROC-1204-K18-22
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/111
Publisher's Statement
© Materials Research Society 2010. Publisher's version of record: https://doi.org/10.1557/PROC-1204-K18-22