Jie Zheng,Bin Sun,Xiao-Xiong Wang,Ze-Xing Cai,Xin Ning,Saad M. Alshehri,Tansir Ahamad,Xing-Tao Xu,Yusuke Yamauchi,Yun-Ze Long
The exploration of a new family of flexible and high-performance electromagnetic shielding materials is of great significance to the next generation of intelligent electronic products. In this paper, we report a simple magnetic-electrospinning (MES) method for the preparation of a magnetic flexible film, γ-Fe2O3nanoparticle-embedded polymeric nanofibers. By introducing the extra magnetic field force on γ-Fe2O3nanoparticles within composite fibers, the critical voltage for spinning has been reduced, along with decreased fiber diameters. The MES fibers showed increased strength for the magnetic field alignment of the micro magnets, and the attraction between them assisted the increase in fiber strength. The MES fibers show modifications of the magnetic properties and electrical conductivity, thus leading to better electromagnetic shielding performance.
In the present work, we report a strategy for aligned packaging of in situ grown CsPbBr3 nanorods (NRs) within polystyrene (PS) nanofibers (CsPbBr3 NR@PS) based on magnetic field assisted electrospinning for enhanced polarized luminescence properties. The as-constructed CsPbBr3 NR@PS fiber membrane exhibits an improved orientation and increased aspect ratio (AR) of the aligned CsPbBr3 NRs within the PS fibers with the increase of the external magnetic field strength. Consequently, their luminescence polarization ratio (P) can be fundamentally enhanced with the increase of the external magnetic field strength. The P of the sample prepared at a magnetic field of 150 mT reaches 0.23, which is 2.6 times that of the conventional analogue fabricated without a magnetic field, and close to the theoretical emission polarization one (Pem-theory), representing their potential applications in optical devices such as liquid crystal displays.
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