Surface segregation of bimetallic alloys in nanoscale confinement | Zendy

Ming Hu | Zendy; Konstantinos P. Giapis | Zendy; Javier V. Goicochea | Zendy; Dimos Poulikakos | Zendy

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Surface segregation of bimetallic alloys in nanoscale confinement

Author(s) -

Ming Hu,

Konstantinos P. Giapis,

Javier V. Goicochea,

Dimos Poulikakos

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3500825

Subject(s) - bimetallic strip , materials science , nanoscopic scale , nanorod , surface energy , metal , molecular dynamics , atom (system on chip) , shell (structure) , carbon nanotube , chemical physics , catalysis , carbon fibers , nanotechnology , chemical engineering , metallurgy , composite material , chemistry , computational chemistry , biochemistry , engineering , composite number , computer science , embedded system

The surface segregation of Pt atoms in liquid bimetallic alloys confined in carbon nanotube cavities was studied using molecular dynamics simulations. Considerable enrichment in the Pt-atom surface density was found to occur in Pt alloys, when the complementary metal has surface energy higher than Pt and simultaneously metal-wall interaction strength lower than that of Pt with the confining wall. The results suggest that solidification of liquid binary alloys in nanochannels could produce core-shell nanorods with the shell enriched in one of the components for catalytic and other applications.

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