Surface Segregation of Fe in Pt–Fe Alloy Nanoparticles: Its Precedence and Effect on the Ordered‐Phase Evolution during Thermal Annealing

Abstract

The front cover artwork for Issue 22/2015 is provided by the Microscopy of Nanoscale Materials Research Group at McMaster University, Canada. The image depicts the marriage between in situ heating and advanced electron microscopy techniques that enabled this research team to track structural, compositional, and configurational evolution of the same alloy nanoparticle over the course of heat treatment. See the Full Paper itself at http://dx.doi.org/10.1002/cctc.201500380.

Bioplasmonic Alloyed Nanoislands Using Dewetting of Bilayer Thin Films

“…The HAADF image contrast is propor-tional to the 1.7 power of the average atomic number in the atomic column. 50 As the Z of Ag (47) and Au (79) are amply different, the Z-contrast imaging method was utilized for investigating both the inhomogeneity of chemical composition and structural conformation within a single AuAg alloyed nanoisland. 51 The elemental maps recorded with EDX fully support the homogeneous distribution of Au and Ag elements in a single alloyed nanoisland (Figure 2b).…”

Inducing formation of L10-phase in concave-cube FePt nanoparticles by annealing under high magnetic field

“…For the wet-chemical synthesized Pt-based binary or multicomponent alloy nanoparticles (NPs), the growth of anisotropic shapes always leads to an anisotropic distribution of the elements [1,2]. In the Pt-transition binary alloy NPs, the Pt atom enriches at the corner (along < 111 > direction), and the transition metal atoms prefer to deposit on the surfaces (along < 100 > direction) [1].…”