Preparation and ferromagnetic properties of Ni0.5Zn0.5Fe2O4/polyaniline core–shell nanocomposites

Synthesis, characterization and application of Ni0.5Zn0.5Fe2O4 nanoparticles for the one pot synthesis of triaryl-1H-imidazoles

Ni_0.5Zn_0.5Fe₂O₄ nanopowder, as a highly efficient and heterogeneous catalyst, was employed for the synthesis of 2,4,5-triaryl substituted imidazoles.

One-Step Synthesis of Superparamagnetic Fe3O4@PANI Nanocomposites

Monodisperse Fe3O4@PANI(Polyaniline) nanocomposites were successfully synthesized at ambient temperature via reverse microemulsion technique with the objective to gain control over the size and morphology of these nanocomposites. The present synthetic approach uses inexpansive FeCl3as a single iron source to prepare Fe3O4@PANI nanocomposites by the reverse microemulsion method. The obtained samples were characterized in detail by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and vibrating sample magnetometer. FTIR and X-ray diffractogram confirm the encapsulation of Fe3O4nanoparticles by PANI. Highly monodisperse spherical Fe3O4@PANI nanocomposites with an average diameter of 60 nm have been produced. The-synthesized nanocomposites exhibit superparamagnetic behavior at room temperature under applied field. Also a novel mechanism employing FeCl3as a single iron source polymerizing aniline and simultaneously forming Fe3O4is discussed.

Preparation of a polymer surface coated with a gradient of quantum dots

In the present study, we generated a polyethylene surface coated with a gradient of quantum dots for use in imaging experiments. The polyethylene surface was first treated with increasing coronal discharge along its length. Next, the surface was reacted with branched polyethyleneimine followed by biotin to produce a polyethylene surface with a gradient of biotin. Finally, the biotin-coated surface was reacted with streptavidin-coated quantum dots. Fluorescent imaging showed that the fluorescence intensity from the quantum dots gradually increased along its length. Such quantum-dot-modified gradient polyethylene surfaces may be useful in biomedical analyses.