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The relationship between the spatially resolved field emission characteristics and the raman spectra of a nanocrystalline diamond cold cathode

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6 Author(s)
Talin, A.A. ; Sandia National Laboratories, Livermore, California 94551 ; Pan, L.S. ; McCarty, K.F. ; Felter, T.E.
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Spatially resolved electron field emission measurements from a nanocrystalline diamond film grown by plasma‐enhanced chemical transport deposition have been obtained using a scanning probe apparatus with micrometer resolution. Macroscopic regions with a high emission site density, and turn‐on fields below 3 V/μm, comprised approximately 1/2 of the total sample area. The emitting and the nonemitting regions of the specimen are differentiated distinctly by Raman spectra and subtly by morphologies. Both areas are largely sp3‐bonded, but only the nonemitting regions exhibit a sharp line at 1332 cm-1, a well‐known signature of diamond in larger crystallites. © 1996 American Institute of Physics.

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Applied Physics Letters  (Volume:69 ,  Issue: 25 )