Preparation of optically functional nanofibres and their optical properties under electrospinning technology

Abstract

Electrospinning is a simple and easy method for preparing nanowire fibres. The diameter of nanowires prepared by this method can be controlled between tens of nanometres and several micrometres. This paper introduces the basic principle and device for preparing nanofibres by electrospinning, and nanofibres with different structures such as solid core, hollow core, porous and ribbon, which are prepared by using electrospinning technology. The related achievements and research progress of luminescent nanofibres and optically polarised nanofibres prepared by electrostatic spinning technology, and the potential applications of such optically functional nanofibres are discussed. In order to further verify the transmission characteristics of light in nanowires, the theoretical simulations of light scattering in nanowire cross sections and nanowire propagation are performed in this paper. The results show that the scattering effect of the laser dye inside the nanowires has little effect on the random laser light; the doped particles have a greater effect on the light in the nanowires; as the diameter of the nanowires increases, the mode of light that can be transmitted gradually increases. Due to the scattering effect of doped nanoparticles, light can be transmitted in nanowires with small diameters; the introduction of surface modification enables light to propagate in irregular curved surfaces and generate many local modes. The simulation results further prove that the number of modes of light that can be transmitted is determined by the diameter of the nanowire, and from the perspective of simulation, it is explained that the scattering enhancement is the reason for the random laser generated by the small diameter nanowire.