## 4 Conclusions  
A facile and general method was presented for the synthesis of PS@TPEE fluorescent microspheres with different morphologies by two-step dispersion polymerization which can be further used as fluorescent anti-counterfeiting inks. By adjusting the concentration of DVB and TPEE, the morphology of PS@TPEE fluorescent microspheres can be transformed from spherical to apple-shaped and hemoglobin-shaped. The synthesized PS@TPEE fluorescent microspheres had an obvious AIE effect, and their fluorescence intensity gradually increased with the amount of TPEE, which avoided the ACQ effect existing in traditional fluorescent materials, and can be used as solid luminous materials. Driven by the photocycling and oxidation of tetraphene, the PS@TPEE fluorescent microspheres can be used as water-based fluorescent inks with erasable properties that can be irreversibly erased by prolonged exposure to ultraviolet light. In addition, the polymorphic PS@TPEE fluorescent microspheres can be further arranged for multiple-information encryption and anti-counterfeiting, and can be verified by fluorescence spectroscopy and laser confocal microscopy. This strategy greatly improves the difficulty of forgery and the security of information, and has a broad application prospect.  
The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/molecules29245852/s1](https://www.mdpi.com/article/10.3390/molecules29245852/s1)]([https://www.mdpi.com/article/10.3390/molecules29245852/s1](https://www.mdpi.com/article/10.3390/molecules29245852/s1)), Figure S1: \({}^{1}\)H NMR spectra of TPEE in CDCl\({}_{3}\); Table S1: Recipes and microspheres' morphology data for two-step dispersion polymerization of St (10 wt% relative to the system) in the presence of DMC, TPEE, and DVB (relative to St); Video S1: Video of different security patterns by screen printing using polystyrene fluorescent microspheres as ink under ultraviolet light; Video S2: Video of different fluorescent pattern by screen printing using polystyrene fluorescent microspheres as ink under ultraviolet light; Video S3: Video of fluorescent numbers and letters writing by water-based ink with polystyrene fluorescent microspheres in direct writing mode under ultraviolet light; Video S4: Video of Tang poetry writing by water-based ink with polystyrene fluorescent microspheres in direct writing mode under ultraviolet light; Video S4: Video of fluorescent security two-dimensional code information gradually displayed under continuous ultraviolet light.  
Z.W., W.Y., F.L., Y.J. and L.P.: Investigation, Methodology, Original Draft; Z.W. M.Y.: Formal analysis, Validation, Supervision, Visualization, and Writing--Review and Editing; Q.D., M.Y. and Q.W.: Data curation and Funding acquisition. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the National Natural Science Foundation of China (No.22108035, No.22208063), Characteristic Innovation Project of Ordinary Universities in Guangdong Province(2023 KTSCX156), the Medical Science and Technology Research Fund of Guangdong Province (A2022004), the Key Project of Biomedicine and Health in Colleges and Universities of Guangdong Province (2021 ZDZX2055), the Innovation Team Project for Colleges and Universities of Guangdong Province (2023 KCXTD030), Guangdong Science and Technology Project (2021B1212050004), and Innovation team project of colleges and universities in Guangdong Province (2024 KCXTD044), which are gratefully acknowledged. The APC was funded by the National Natural Science Foundation of China (No.22108035).  
**Data Availability Statement:** The data can be obtained from the authors.  
**Conflicts of Interest:** The authors declare that there are no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.