Chapter 2 - Geometric structures and chemical ordering in nanoalloys☆

Abstract Here we introduce the most important geometric structures (also denoted as structural motifs) and chemical ordering patterns, qualitatively discussing the driving forces that determine their stability. Crystalline and noncrystalline structural motifs are considered. Crystalline motifs comprise fragments of the fcc, bcc, and hcp bulk lattices. Noncrystalline motifs comprise decahedra, icosahedra, and polyicosahedra. Different types of mixing and nonmixing chemical ordering patterns are introduced, from random-solution, to ordered-phase, to core-shell, Janus and multi-shell arrangements.