Controlled synthesis and assembly of FePt nanoparticles

Article Abstract:

Monodisperse 4 nm FePt magnetic nanoparticles are synthesized by superhydride reduction of FeCl2 and Pt(acac)(sub 2) at high temperature. Chemical analysis of the assemblies indicate that more iron oxide is present in the thinner assemblies annealed at lower temperature or for shorter time.

Iron, Iron (Metal), Magnetism

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N2 chemisorption on stepped Pt surfaces by 2-D and 1-D precursor behavior

Article Abstract:

The experiment shows that N2 chemisorbs at 88K on two stepped platinum surfaces, Pt(335) and Pt(779), with exclusive occupancy of step sites. An irreversible conversion from 2-D and 1-D precursor motion occurs as terrace-bound precursors irreversibly convert to step-bound precursors.

Surface chemistry

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IR optical properties of Pt nanoparticles and their agglomerates investigated by in situ FTIRS using CO as the probe molecule

Article Abstract:

The synthesization of platinum nanoparticles and their agglomerates by using the chemical reduction method is studied. It is shown that the enhanced infrared absorption (EIRA) and the abnormal infrared effects (AIRES) are closely related to agglomerate states of Pt nanoparticles.

Usage, Observations, Infrared spectroscopy, Chemical reactions, Structure

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