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Title: Thermodynamics of surface compositional segregation in Ni-Co nanoparticles
Authors: Jayaganthan, R. 
Chow, G.M. 
Keywords: Ni-Co nanoparticles
Size effect
Surface segregation
Issue Date: 1-Aug-2002
Citation: Jayaganthan, R., Chow, G.M. (2002-08-01). Thermodynamics of surface compositional segregation in Ni-Co nanoparticles. Materials Science and Engineering B: Solid-State Materials for Advanced Technology 95 (2) : 116-123. ScholarBank@NUS Repository.
Abstract: Thermodynamic analysis of a Ni-Co alloy nanoparticle (atomic ratio 1:1) is carried out to study the influence of size effect on surface compositional segregation. The surface compositions of Ni-Co nanoparticles are calculated based on the regular solution model, which takes into account of the size effect, and compared with that of bulk alloy particles with a larger size. It is observed that the segregated surface compositions in the Ni-Co binary alloy single-crystal nanoparticles (with particle diameter of 10-100 nm) are few times larger than that of the corresponding bulk single crystal (with the particle diameter > 100 nm). The details of the thermodynamic modeling and the calculated surface compositions due to segregation are discussed. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Materials Science and Engineering B: Solid-State Materials for Advanced Technology
ISSN: 09215107
DOI: 10.1016/S0921-5107(02)00221-0
Appears in Collections:Staff Publications

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