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Field emission stability and properties of simultaneously grown microcrystalline diamond and carbon nanostructure films

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3 Author(s)
Uppireddi, Kishore ; Department of Physics, University of Puerto Rico, San Juan, Puerto Rico 00931 ; Weiner, Brad R. ; Morell, Gerardo

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The temporal stability and electron field emission characteristics of simultaneously grown microcrystalline diamond and carbon nanostructures were investigated. The films were prepared by hot filament chemical vapor deposition using typical diamond deposition parameters, and iron oxide nanoparticles on the molybdenum substrate were employed as catalyst for their induction. The hybrid system presented better emission characteristics compared with microcrystalline diamond with turn-on fields as low as 2.45 Vm (at 1 μA/cm2), and a current density of up to 0.24 mA/cm2 was achieved. The films showed relatively stable emission behavior for a period of 24 h.

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Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:28 ,  Issue: 6 )