Electric field induced formation of one-dimensional bismuth ferrite (BiFeO3) nanostructures in electrospinning process

• Published in: Materials & design 2016-03, Vol.94, p.487-495
• Main Authors: Sakar, M., Balakumar, S., Saravanan, P., Jaisankar, Sellamuthu N.
• Format: Article
• Language: English
• Subjects: Belts; Bismuth ferrite; Electric potential; Electrospinning; Ferrite; Fibers; Formations; Multiferroics; Nanostructure; Nanostructures; Voltage
• ISSN: 0264-1275; 1873-4197
• DOI: 10.1016/j.matdes.2016.01.029

We report the characteristic influence of applied-voltage on the fabrication of one-dimensional fiber nanostructures of bismuth ferrite (BiFeO3/BFO) in electrospinning process. The applied voltage of 8kV is found to be the threshold voltage for the formation of BFO fibers. The further systematic variation of voltages such as 10kV, 15kV and 20kV yielded smaller broken-fibers that appeared to be rod-like nanostructures, lengthy-ordered fibers, and belt-like nanostructures respectively. The crystal phase analysis by X-ray diffraction technique revealed the rhombohedral perovskite structure of BFO. The average diameter/thickness of rods, fibers and belts is estimated from their FESEM and HRTEM images and it found to be 90–150nm, 100–200nm and 100–150nm respectively. The optical and magnetic studies by UV–visible spectrometer and SQUID magnetometer respectively revealed the dimension dependent optical properties, where their magnetic properties are found to be in the order of belts>rods>fibers>aggregated fibers. The formation of fibers is initiated with the evolution of electrified jet; where the variation in the applied voltage causes bending and whipping instability in the electrified jet that presumably determined the morphological and compositional structures of fibers. We have demonstrated the applied voltage dependent evolution of one-dimensional nanostructures of bismuth ferrite (BiFeO3) in the electrospinning process. [Display omitted] •Applied voltage dependent formation of 1D nanostructures of BiFeO3 is demonstrated.•The increasing voltage leads to the significant changes in the dimension and structure of the fibers.•1D nanostructures of BiFeO3 such as aggregated fibers, nanorods, nanofibers and nanobelts have been obtained.•The template-behavior of polymer under different applied voltages leads to different 1D nanostructures.