Synthesis and Field Emission Properties of Hybrid Structures of Ultrananocrystalline Diamond and Vertically Aligned Carbon Nanofibers

Journal Article · Sat Dec 31 23:00:00 EST 2005 · Diamond and Related Materials

DOI:https://doi.org/10.1016/j.diamond.2005.07.013· OSTI ID:1003581

Xiao, X. ^[1]; Auciello, O. ^[1]; Cui, Hongtao ^[2]; Lowndes, Douglas H ^[2]; Merkulov, Vladimir I ^[2]; Carlisle, J. ^[1]

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1. Argonne National Laboratory (ANL)
2. ORNL

Ultrananocrystalline diamond (UNCD) films with and without nitrogen doping were deposited onto vertically aligned carbon nanofibers (VACNFs). The field emission properties of these hybrid structures were studied. It is found that the UNCD films were deposited on VACNFs with a high degree of conformality using an optimized seeding process. This hybrid structures exhibited greatly improved macroscopic field emission performance compared with uncoated VACNFs. Further enhancement was observed for nitrogen-doped UNCD on VACNFs, with low threshold field emission (2.5 V/{micro}m) and low work functions for the field emission. The stability of the emission was also improved as compared to the uncoated VACNFs.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003581
• Journal Information: Diamond and Related Materials, Journal Name: Diamond and Related Materials Journal Issue: 2-3 Vol. 15; ISSN 0925-9635
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
DIAMONDS
FIBERS
FIELD EMISSION
NANOSTRUCTURES
PERFORMANCE
STABILITY
SUBSTRATES
SYNTHESIS
THIN FILMS
WORK FUNCTIONS