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Surface segregation of bimetallic alloys in nanoscale confinement

Hu, Ming and Giapis, Konstantinos P. and Goicochea, Javier V. and Poulikakos, Dimos (2010) Surface segregation of bimetallic alloys in nanoscale confinement. Applied Physics Letters, 97 (15). Art. No. 153107 . ISSN 0003-6951.

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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.

Item Type:Article
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URLURL TypeDescription DOIArticle
Giapis, Konstantinos P.0000-0002-7393-298X
Additional Information:© 2010 American Institute of Physics. Received 21 July 2010; accepted 15 September 2010; published online 12 October 2010. K.P.G. is grateful to ETH-Zürich for a visiting professorship grant. Computational support from the Brutus Cluster at ETH-Zurich is acknowledged. This work was supported by the Swiss National Supercomputing Centre-CSCS under project ID s243.
Funding AgencyGrant Number
Swiss National Supercomputing Centre-CSCSs243
Subject Keywords:carbon nanotubes, liquid alloys, molecular dynamics method, nanorods, nickel alloys, platinum alloys, solidification, surface energy, surface segregation
Issue or Number:15
Classification Code:PACS: 68.35.Dv; 81.30.Fb; 64.70.D-
Record Number:CaltechAUTHORS:20101109-100315498
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20735
Deposited By: Tony Diaz
Deposited On:18 Nov 2010 22:13
Last Modified:03 Oct 2019 02:14

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