Abstract
Carbon-encapsulated Ag and Cu nanoparticles were synthesized using pulsed-wire evaporation (PWE). All as-made materials were composed of nanocapsules with a uniform particle size at and below 50 nm. The nanocapsules consisted of an outer carbon layer shaped multi-shell. The dispersion stability of the solvent depends on the measured zeta potential for the particles in water, ethanol, ethylene glycol (EG), and polyethylene glycol (PEG). In the case of Ag@C, a stable dispersion was observed in the PEG suspension only. The stable dispersions of Cu@C were observed in EG and PEG without showing any clarification or sedimentation. Flocculation by a coalescing reaction between the nanoparticles was insignificant due to carbon layers on the surfaces of the metal (Ag and Cu) particles.
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