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Field emission through diamond/Mo interfaces

Published online by Cambridge University Press:  03 September 2012

W.B. Choi,
A.F. Myers,
J.J. Cuomo and
J.J. Hren
W.B. Choi
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA, wchoi@eos.ncsu.edu
A.F. Myers
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA, wchoi@eos.ncsu.edu
J.J. Cuomo
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA, wchoi@eos.ncsu.edu
J.J. Hren
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA, wchoi@eos.ncsu.edu
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Abstract

The influence of interfacial nanostructure on electron emission from diamond coated Mo emitters is presented. Diamond coating is known to increase electron emissivity, but interfacial oxides and an amorphous layer change the magnitude. After annealing, emissivity was enhanced further and Mo2C was formed at the interface, as well as a decrease in the oxides and amorphous layers. The shape of the FEM image changed but no individual emitting sites were observed. Possible mechanisms causing these changes are discussed.

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