Field Emission and Nanostructure of Carbon Films

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The results of field emission measurements of various forms of carbon films are reported. It is shown that the films nanostructure is a crucial factor determining the field emission properties. In particular, smooth, pulsed-laser deposited amorphous carbon films with both high and low sp3 contents are poor field emitters. This is similar to the results obtained for smooth nanocrystalline, sp2-bonded carbon films. In contrast, carbon films prepared by hot-filament chemical vapor deposition (HE-CVD) exhibit very good field emission properties, including low emission turn-on fields, high emission site density, and excellent durability. HF-CVD carbon films were found to be predominantly sp2-bonded. ... continued below

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Merkulov, V.I.; Lowndes, D.H. & Baylor, L.R. November 29, 1999.

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The results of field emission measurements of various forms of carbon films are reported. It is shown that the films nanostructure is a crucial factor determining the field emission properties. In particular, smooth, pulsed-laser deposited amorphous carbon films with both high and low sp3 contents are poor field emitters. This is similar to the results obtained for smooth nanocrystalline, sp2-bonded carbon films. In contrast, carbon films prepared by hot-filament chemical vapor deposition (HE-CVD) exhibit very good field emission properties, including low emission turn-on fields, high emission site density, and excellent durability. HF-CVD carbon films were found to be predominantly sp2-bonded. However, surface morphology studies show that these films are thoroughly nanostructured, which is believed to be responsible for their promising field emission properties.

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OSTI as DE00755658

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  • Materials Research Society Fall Meeting, Boston, MA (US), 11/29/1999--12/03/1999

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  • Report No.: ORNL/CP-105622
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 755658
  • Archival Resource Key: ark:/67531/metadc702793

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  • November 29, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 25, 2016, 12:15 p.m.

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Merkulov, V.I.; Lowndes, D.H. & Baylor, L.R. Field Emission and Nanostructure of Carbon Films, article, November 29, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc702793/: accessed May 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.