Preparation and Characterization of Monodisperse Fe Nanoparticles

Abstract

Fe nanoparticles prepared by iron carbonyl decomposition using different methods are compared structurally, chemically, and magnetically. The specific magnetization of the particles was determined from the magnetic moment, the particle size observed by transmission electron microscopy, and the total iron concentration found from calibrated X-ray fluorescence. The volume fraction of oxide is reported for particles of different sizes and for particles made by slightly different techniques.

Laser-Assisted Synthesis of Superparamagnetic Fe@Au Core−Shell Nanoparticles

“…Monodispersed Fe nanoparticles were prepared under nitrogen atmosphere via thermal decomposition of iron pentacarbonyl, Fe(CO) 5 . 17 In a typical homogeneous nucleation synthesis of ∼8-nm-diameter particles, 2.28 g of oleic acid (OA) was stirred in 20 mL of octyl ether, the solution was heated to 40°C, and 0.3 mL of Fe(CO) 5 was injected in a 1:3 molar ratio to the OA. Following the injection, the reaction mixture became orangeyellow.…”

Iron nanoparticle assemblies: structures and magnetic behavior

“…These particles are synthesized by high temperature solution chemistry methods, and they are coated with a layer of surfactant molecules [18]. An individual particle may have hundreds to hundreds of thousands of atoms, and the atomic magnetic moments are exchange coupled into a single magnetic domain with a giant moment, so that the particle itself acts like a giant spin.…”

Vacancy Coalescence during Oxidation of Iron Nanoparticles

“…2 In order to prepare iron nanoparticles, 0.4 mL of Fe(CO) 5 was injected at 200°C into 10 mL of air-free octadecene (C 18 H 38 ) containing 0.67 mmol of oleylamine under vigorous stirring. The resulting solution was reacted for 20 min.…”