Browsing by Author "Buchholz, D. B."

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EELS plasmon studies of silver/carbon core/shell nanocables prepared by simple arc discharge
(2007-04-01)
Wang, L. S.
;
Buchholz, D. B.
;
Li, Y.
;
Li, J.
;
Lee, C. Y.
A method for the fabrication of large quantities of high quality silver nanocables encapsulated in carbon nanotubes (Ag@C) using a hydrogen arc is presented. A growth mechanism based on the generation of poly-aromatic hydrocarbons by the hydrogen arc is proposed. The size-dependent electronic structures of the resultant materials are investigated using electron energy loss spectroscopy (EELS). The surface plasmon and bulk-excitation character observed by EELS are discussed. As the diameter of Ag@C nanocable decreases, the surface and bulk plasmons of the silver core shift to lower energy and the peaks broaden. Measurements of electrical conductivity exhibits a liner current-voltage character with a conductivity of 0.5x10(4) S/cm for the nanocable structure.