Synthesis of lanthanide‐doped strontium aluminate nanoparticles encapsulated in polyacrylonitrile nanofibers: Photoluminescence properties for anti‐counterfeiting applications (original) (raw)

Luminescence

Abstract

Photochromism has been applied as an interesting technique to improve the anti-counterfeiting of commercial commodities. In order to build up a mechanically reliable anti-counterfeiting nanocomposite, it has been vital to enhance the engineering process of the anti-counterfeiting material. In the current study, we developed mechanically reliable and highly photoluminescent lanthanide-doped strontium aluminate nanoparticles (LSAN)/polyacrylonitrile (PAN) hybrid nanofibers successfully fabricated by electrospinning technique for anti-counterfeiting applications. The produced nanocomposite films exhibited ultraviolet-induced photochromic anti-counterfeiting property. In order to guarantee the transparent of the LSAN-PAN film, LSAN must be immobilized into the nanoparticle size to allow better dispersion without aggregation in the polyacrylonitrile matrix. The LSAN-PAN nanofibrous film demonstrated absorbance intensity at 354 nm associated with an emission intensity at 424 nm. The produced LSAN-PAN films demonstrated an enhanced hydrophobicity with increasing the ratio of LSAN without adversely influence their native appearance and mechanical performance. Upon excitation with ultraviolet, the translucent nanofibrous substrates exhibited fast and reversible photochromic activity to greenish-yellow without exhaustion. The nanofibrous films exhibited stretchability, transparency, flexibility and ultraviolet-induced photochromism at low-cost. The current strategy can be considered as an efficient technique toward the development of various anti-counterfeiting materials for a better market with economic and social values.

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