Spatially resolved electron energy loss spectroscopy on n-type ultrananocrystalline diamond films

Arenal, R. ; Stephan, O. ; Bruno, P. ; Gruen, D.M.

Resumen: The addition of nitrogen to the synthesis gas during synthesis of ultrananocrystalline-diamond (UNCD) films results in films uniquely exhibiting very high n-type electrical conductivity even at ambient temperatures. This result is due to the formation of nanowires having elongated diamond core nanostructures and a sp2-bonded C sheath surrounding the core. The work presented here provides detailed confirmation of this important result through spatially resolved-electron energy loss spectroscopy. The direct observation of nitrogen incorporated in the sheath has been enabled. The incorporation of this nitrogen provides strong support to a plausible mechanism for the n-type conduction characteristic of the UNCD films.

Idioma: Inglés

DOI: 10.1063/1.3095663

Año: 2009

Publicado en: APPLIED PHYSICS LETTERS 94, 11 (2009), 111905 [3 pp.]
ISSN: 0003-6951

Factor impacto JCR: 3.554 (2009)

Categ. JCR: PHYSICS, APPLIED rank: 14 / 107 = 0.131 (2009) - Q1 - T1

Tipo y forma: Article (Published version)