Jason Moscatello - Comparing Field Emission Stability of Lithography-free, Modified Multi-walled Carbon Nanotubes,

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  Publication Details (including relevant citation   information):

  Archana Pandey, Abhishek Prasad, Jason Moscatello and Yoke Khin   Yap

  Materials Research Society Symposium Proceedings, Volume 1204,   Paper 1204-K18-22, 2010

  Jason Moscatello and Yoke Khin Yap


  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.

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