Bimetallic Pt-Ag and Pd-Ag nanoparticles

Journal Article · Tue Apr 19 04:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1888043· OSTI ID:1008526

Lahiri, Debdutta ^[1]; Bunker, Bruce ^[1]; Mishra, Bhoopesh ^[1]; Zhang, Zhenyuan ^[1]; Meisel, Dan ^[1]; Doudna, C. M. ^[2]; Bertino, M. F. ^[2]; Blum, Frank D. ^[2]; Tokuhiro, A. T. ^[2]; Chattopadhyay, Soma ^[3]; Shibata, Tomohiro ^[3]; Terry, Jeff ^[3]

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1. Univ. of Notre Dame, IN (United States)
2. Univ. of Missouri, Rolla, MO (United States)
3. Illinois Inst. of Technology, Chicago, IL (United States)

We report studies of bimetallic nanoparticles with 15%–16% atomic crystal parameters size mismatch. The degree of alloying was also probed in a 2-nm Pt core ssmallest attainable core sized of Pt–Ag nanoparticles scompletely immiscible in bulkd and 20-nm-diameter Pd–Ag nanowires scompletely miscible in bulkd. Particles were synthesized radiolytically, and depending on the initial parameters, they assume spherical or cylindrical snanowired morphologies. In all cases, the metals are seen to follow their bulk alloying characteristics. Also, Pt and Ag segregate in both spherical and wire forms, which indicates that strain due to crystallographic mismatch overcomes the excess surface free energy in the small particles. The Pd–Ag nanowires alloy similar to previously reported spherical Pd–Ag particles of similar diameter and composition

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-04ER46106
• OSTI ID: 1008526
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 97; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: ENGLISH