Colloidal Synthesis of Magnetic CuCr2S4 Nanocrystals and Nanoclusters
Citations Over TimeTop 23% of 2011 papers
Abstract
Nanocrystals and nanoclusters of the room-temperature magnetic spinel CuCr(2)S(4) have been synthesized using a facile solution-based method. The synthesis involves hot injection of an excess of 1-dodecanethiol (1-DDT) into a boiling coordinating solvent containing CuCl(2) and CrCl(3)·6H(2)O. Using octadecylamine (ODA) as a solvent yields cube-shaped nanocrystals with an average size of 20 ± 2 nm, while with oleylamine (OLA), nanoclusters with an average size of 31 ± 2.5 nm are obtained. In both cases, powder X-ray diffraction patterns confirmed the formation of the pure spinel phase without any impurities. While the synthesized powders are superparamagnetic near room temperature, they exhibit ferromagnetic behavior at lower temperatures, with magnetization (M(S)) values of 30 emu/g (1.63 μ(B)/f.u.) and 33 emu/g (1.79 μ(B)/f.u.) for the ODA- and OLA-capped nanocrystals and nanoclusters, respectively, at 5 K.
Related Papers
- → Homogenously hexagonal prismatic AgBiS2nanocrystals: controlled synthesis and application in quantum dot-sensitized solar cells(2015)49 cited
- → Hcp cobalt nanocrystals with high magnetic anisotropy prepared by easy one-pot synthesis(2016)40 cited
- → Single-source precursor synthesis of colloidal CaS and SrS nanocrystals(2012)17 cited
- → Colloidal synthesis of monodisperse quaternary CuInSSe nanocrystals(2012)9 cited
- → Superparamagnetic γ-Fe2O3 nanoclusters in silicate matrices(2006)4 cited