Electron field emission from various morphologies of fluorinated amorphous carbon nanostructures

Lai, S. H.; Chang, K. L.; Shih, H. C.; Huang, K. P.; Lin, P.
December 2004
Applied Physics Letters;12/20/2004, Vol. 85 Issue 25, p6248
Academic Journal
Unlike general fluorination, amorphous fluorinated carbon (a-C:F) nanostructures have been synthesized directly and efficiently by an electron cyclotron resonance chemical vapor deposition (ECR–CVD) system using a mixture of C2H2, CF4, and Ar as precursors. The electron field-emission properties of the a-C:F nanostructures were investigated. The a-C:F nanoporous films with a low turnon field (1.8 V/μm) are apparently lower than other types of a-C:F nanostructures. The a-C:F nanostructures have a greater field-enhancement factor (2500–4000) than other nonaligned multiwall nanotubes. However, the a-C:F nanostructures follow the Fowler–Nordheim characteristics only in the medium emission current region and they deviate from the characteristics in the low and high emission current regions.


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