A smart nanofiber film based azobenzene moiety with reversible photoresponsive patterning ability for information storage

Abatract Information storage and security have consistently been critical concerns in modern society, and the advancement of related chemical storage systems continues to present significant challenges. The azobenzene molecule exhibits unique optical properties by changing colour before and after UV irradiation. In this paper, the nanofiber film (AZO-PVDF) has been produced by combining specifically structured azobenzene molecule (3F-Azo) with polyvinylidene fluoride (PVDF) through electrospinning technology. In particular, its potential application in the field of information storage has been attracted attention. Nanofiber films with different compositions have been successfully prepared by precisely controlling the 3F-Azo/PVDF ratio and the rotating speed during electrospinning. The analysis results show that the identification precision of film patterning has been significantly improved by optimizing the 3F-Azo/PVDF ratio. At the same time, the adjustment of the rotating speed could refine the fiber diameter and increase the specific surface area, thereby improving the isomerization property of the films. These nanofiber films show a wide application prospect in the fields of rewritable optical patterns. The research results broaden the scope of application of electrostatic spinning technology for information storage technology, secure printing and smart packaging.