Morphology and Structure of Aerosol Carbon-Encapsulated Metal Nanoparticles from Various Ambient Metal-Carbon Spark Discharges

Title
Morphology and Structure of Aerosol Carbon-Encapsulated Metal Nanoparticles from Various Ambient Metal-Carbon Spark Discharges
Author(s)
변정훈김장우[김장우]
Keywords
MAGNETIC-PROPERTIES; FE NANOPARTICLES; NANOCRYSTALS; NANOCAPSULES; IRON; MICROSTRUCTURE; NANOSTRUCTURES; FE(C); CAGES; VAPOR
Issue Date
201004
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.2, no.4, pp.947 - 951
Abstract
The morphology and structure of aerosol carbon encapsulated metal nanoparticles (CEMNs) of various transition metals (anode; Ti, Cu, Zn, Mo, Pd, W, Pt, or Au) formed by ambient spark discharge at the same electrical operating specifications were analyzed. CEMNs were produced with aggregated carbon particles, and their yields and sizes varied according to the metal-to-carbon fraction of each discharge relating to the ionization potential of the electrode material. Each encapsulated metal had natural crystallinity for all discharges, but carbon graphitization for the Mo-C and W-C configurations, which have relatively small differences in melting temperature between the materials, was particularly weak. An empty zone in the carbon shell was also detected in the CEMNs because of the difference in density between the molten and solid phases of the core metal during encapsulation.
URI
http://hdl.handle.net/YU.REPOSITORY/22590http://dx.doi.org/10.1021/am100015a
ISSN
1944-8244
Appears in Collections:
공과대학 > 기계공학부 > Articles
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