CoPt and FePt nanostructures have been efficiently confined in carbon nanotubes (CNTs). A marked confinement effect has been evidenced, both on bimetallic nano-object shape and composition. In large diameter CNTs small Co- and Fe-rich nanoparticles are formed, while in small diameter CNTs Pt-rich nanowires are selectively produced.

INTRODUCTION Previous research has demonstrated that chronic cigarette smoking and major depressive disorder (MDD) are each associated with cognitive decrements. Further, these conditions co-occur commonly, though mechanisms in the comorbid condition are poorly understood. There may be distinct, additive, or overlapping factors underlying comorbid cigarette smoking and MDD. The present study in...

Functionalized magnetic nanoparticles (MNPs) have been characterized by laser desorption/ionization mass spectrometry (LDI-MS). Quantitative information about surface ligand composition and structure for monolayer and mixed monolayer protected Fe3O4 and FePt NPs can be obtained rapidly with very little sample consumption.

Hard-magnetic films with precisely tuned switching fields are of great interest for advanced magnetic microsystems. Here we report on the specific evolution semi-hard properties L 1 0 -FePt integrating a graded concentration soft cobalt nano...

The effect of structural relaxations on the magnetocrystalline anisotropy energy (MAE) was investigated by using density functional theory (DFT). impact magnetostructural coupling MAE discussed, including effects attempt frequency. for ferromagnetic FePt (3.45 meV/formula unit) and antiferromagnetic PtMn (0.41 were calculated within local approximation (LDA). relaxation found to give a <0.5%...

Multi-metallic Pd@FePt core–shell nanoparticles were synthesized using a direct seed-mediated growth method, consisting of facile and mild procedures, to increase yield. The Fe/Pt ratio in the shell was easily controlled by adjusting amount Fe Pt precursors. Furthermore, compared with commercial Pt/C catalysts, exhibited excellent activity stability toward methanol oxidation reaction (MOR), mak...

The dependence of the degree order and perpendicular magnetic anisotropy (Ku⊥) on layer thickness (dmag) for FePt granular films with various grain boundary materials (GBMs) were investigated. According to analysis a constant GBM volume 30 vol%, order, disorder, non-epitaxial portions co-existed in films. From separate quantitative evaluation these portions, following was found; 1) magnitudes K...