Proceedings of the 43rd International Field Emission Symposium
J. Phys. IV France 06 (1996) C5-97-C5-102
Enhanced Field Emission from Diamond Coated Molybdenum EmittersW.B. Choi, M.T. McClure, R. Schlesser, Z. Sitar and J.J. Hren
Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695-7907, U.S.A.
The field emission characteristics of individual Mo emitters were measured before and after diamond deposition, as well as before and after annealing. After coating without annealing, the emission current increased dramatically. Subsequent annealing resulted in further increases in emission and improved current stability. After coating, the energy distribution of the emitted electrons was found to shift with applied field. Annealing reduced the peak shift but resulted in the appearance of a second peak, coincident with the formation of Mo2C at the diamond-molybdenum interface. These changes in the emission spectra in conjunction with I-V data are discussed in terms of possible changes in emission mechanism.
© EDP Sciences 1996