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APS » Journals » Phys. Rev. Lett. » Volume 92 » Issue 19
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Phys. Rev. Lett. 92, 196102 (2004) [4 pages]

Surface Reconstruction and Decahedral Structure of Bimetallic Nanoparticles

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J. L. Rodríguez-López1, J. M. Montejano-Carrizales2, U. Pal3,4, J. F. Sánchez-Ramírez5, H. E. Troiani6, D. García7, M. Miki-Yoshida7,8, and M. José-Yacamán7,*
1Advanced Materials Department, IPICYT, Camino Presa San José 2055, 78216 San Luis Potosí, San Luis Potosí, Mexico
2Instituto de Física, Universidad Autónoma de San Luis Potosí, 78000 San Luis Potosí, San Luis Potosí, Mexico
3Instituto de Física, Universidad Autónoma de Puebla, Apartado Postal J-48, 72570 Puebla, Puebla, Mexico
4Instituto Mexicano del Petróleo, Eje Central Lázaro Cardenas 152, 07730 México, Distrito Federal, Mexico
5Facultad de Ciencias Químicas, Instituto de Ciencias, Universidad Autónoma de Puebla, 72570 Puebla, Puebla, Mexico
6Instituto Balseiro and CNEA 8400, San Carlos de Bariloche, Rio Negro, Argentina
7Department of Chemical Engineering and Texas Materials Institute, The University of Texas, 78712-1063 Austin, Texas, USA
8Centro de Investigación en Materiales Avanzados S.C., Miguel de Cervantes 120, 31109 Chihuahua, Chihuahua, Mexico

Received 20 September 2003; published 13 May 2004

We report on energetic surface reconstruction phenomena observed on bimetallic nanoparticle systems of AuPd and AuCu, similar to a resolidification effect observed during the cooling process in lead clusters. These binary alloy nanoparticles show the fivefold edges truncated, resulting in {100} facets on decahedral structures, an effect largely envisioned and reported theoretically, with no experimental evidence so far. We demonstrate experimentally as well as by computational simulations that this new eutectic structure is favored in such nanoalloy systems.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.196102
DOI:
10.1103/PhysRevLett.92.196102
PACS:
68.35.Bs, 81.07.–b

*Corresponding author.

Electronic address: yacaman@che.utexas.edu

 
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