The problem of the mechanisms of void nucleation in nanoparticles and related problem of the stresses and their relaxation in nanoparticles are of signiﬁcant importance and far from being resolved. It is not surprising that there are several approaches with diﬀerent and, in the given case, opposite assumptions. Thus, in ref 1, surface tension is neglected, and volumetric strain due to oxidation is introduced in the oxide shell. It is stated that for linear lattice mismatch α ≥ 0.3 large tensile stresses in a metal core are suﬃcient for void nucleation.
Available at: http://works.bepress.com/hamed_attariani/8/