Colloidal synthesis and magnetic properties of anisotropic-shaped spinel CuCr2Se4 nanocrystals

Colloidal nanocrystal shape and size control: the case of cobalt.

We show that a relatively simple approach for controlling the colloidal synthesis of anisotropic cadmium selenide semiconductor nanorods can be extended to the size-controlled preparation of magnetic cobalt nanorods as well as spherically shaped nanocrystals. This approach helps define a minimum feature set needed to separately control the sizes and shapes of nanocrystals. The resulting cobalt ...

Colloidal synthesis of germanium nanocrystals

In this study, colloidal germanium nanocrystals were synthesized by a simple and novel method, and their optical properties were also studied. Polyvinyl alcohol (PVA) as a surface modifier was used to control the optical properties of colloidal Ge nanocrystals. Fourier transform infrared spectroscopy (FTIR) analysis was performed to identify the various functional groups present in the sample. ...

Colloidal synthesis of magnetic CuCr2S4 nanocrystals and nanoclusters.

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 ...

Bi-functional NaLuF4:Gd3+/Yb3+/Er3+ nanocrystals: hydrothermal synthesis, optical and magnetic properties

Magnetic-fluorescent lanthanide doped sodium lutetium fluoride (NaLuF4:Yb3+/Er3+/Gd3+) nanocrystals were synthesized via facile hydrothermal method by varying concentration of Gd3+. Powder X-ray powder diffraction (PXRD), scanning electron microscopy (SEM),transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), p...

Size-controlled synthesis of magnetic CuCr2Se4 nanocrystals.