One-step fabrication of coaxial nanofibres with core (Ni0.5Zn0.5Fe2O4)/sheath (ZnO) via coaxial electrospinning

One-dimensional coaxial nanofibres with a core (Ni_0.5Zn_0.5Fe₂O₄)/sheath (ZnO) were produced by coaxial electrospinning and calcining. The core/sheath structures were clearly visible by transmission electron microscopy (TEM), because of, respectively, putting chloroform and glycerin into the core and the sheath precursor solutions. Their core/sheath structures, chemical compositions and phase analysis were investigated by means of high-resolution TEM, scanning electron microscopy and X-ray diffraction. The results show that its mean diameter is 30 nm; the thickness of the shell is 8 nm; and ZnO promotes the axial growing of Ni_0.5Zn_0.5Fe₂O₄.