Concepedia

Synthesis of Highly Magnetic, Air-Stable Iron–Iron Carbide Nanocrystalline Particles by Using Power Ultrasound A. Gedanken is grateful for the support of the German Ministry of Science through the Deutsche-Israeli DIP program. I. Felner and A. Gedanken thank also the Israeli Ministery of Science, Culture and Sport for an infrastructure grant. S. I. Nikitenko thanks the Bar-Ilan Research Authority for his fellowship. The authors also thank Dr. Shifra Hochberg for editorial assistance.

Sergei I. Nikitenko, Yuri Koltypin, O. Palchik, I. Felner, Xiao Xu, Aharon Gedanken

Angewandte Chemie International Edition · 2001 · 109 citations · 0 references

Concepts

Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsNanomaterialsNanotechnologyCarbon NanomaterialsFerromagnetic MaterialsFerromagnetismMagnetic NanomaterialsMagnetic Properties Of SolidsNanoparticle SynthesisIron-based AlloysMagnetic NanoparticlesNanocrystalline Magnetic MaterialsNanocrystalline MaterialsSaturationSaturation MagnetizationSonochemical Synthesis

Abstract

A coating of iron carbide and carbon confers air-stability on the nanocrystalline iron particles that were prepared by sonolysis of [Fe(CO)5] in diphenylmethane followed by annealing of the as-prepared material. The saturation magnetization of this material (222 emu g−1, see picture) is almost as high as that of bulk bcc iron.