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HIGH-CURRENT PULSED ARC PREPARATION OF CARBON AND METAL-CARBON NANOPARTICLES

S. Muhl1,* , F. Maya1, S. Rodil1, G. Gonzalez1, E. Camps2, L. Escobar-Alarcon2, M. Espinosa-Pesqueira2

Affiliation

  1. Instituto de Investigaciones en Materiales, UNAM, D.F. 04510, México, México
  2. Instituto Nacional de Investigaciones Nucleares, Edo. de México, México, México

Abstract

We report the preparation of graphite and carbon-metal clusters by high-current pulsed arc evaporation of the electrodes used. Experiments were performed as a function of the gas pressure and type, for the graphite electrodes, and the metal type used as one of the electrodes, for the carbon-metal particles. The maximum arc current was varied by controlling the circuit resistance and the charge voltage of the bank of capacitors (total capacitance 0.5 F). The deposits were studied by AFM, SEM and TEM, and the chemical analysis of the deposits was performed using XPS and EDX. Most experiments were carried out at atmospheric pressure, but both the effect of the ambient pressure and gas type, air, helium and argon were studied for conditions that had been found to be efficient for the cluster production..

Keywords

Pulsed Arc, Carbon nanoparticles, Encapsulated metal nanoparticles.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

S. Muhl, F. Maya, S. Rodil, G. Gonzalez, E. Camps, L. Escobar-Alarcon, M. Espinosa-Pesqueira, HIGH-CURRENT PULSED ARC PREPARATION OF CARBON AND METAL-CARBON NANOPARTICLES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 231-236 (2005)