A versatile synthetic approach for the synthesis of CoO, CoxC, and Co based nanocomposites: tuning kinetics and crystal phase with different polyhydric alcohols

作者：Huba Zachary J^*; Carpenter Everett E

来源：CrystEngComm, 2014, 16(34): 8000-8007.

DOI：10.1039/c4ce00931b

The solution synthesis of magnetic nanoparticles allows for precise control of a particle's shape, size, and crystal phase on the nanoscale, key parameters in tuning the intrinsic magnetic properties of nanoparticles. In this study, we investigate the role of polyhydric alcohols for the solution synthesis of cobalt carbide nanoparticles, a newly discovered hard ferromagnetic material. The oxidative stability of the polyhydric alcohol at reaction temperatures plays a significant role in the kinetics of carbide formation, as well as the phase produced (Co2C vs. Co3C). By tuning the oxidation rate of the polyhydric alcohol, composites of CoO, CoxC, and Co phases can be produced, allowing for magnetic composites comprised of anti ferromagnetic, hard ferromagnetic and soft ferromagnetic phases.

• 出版日期2014