Liu, Y., Liang, S., Yuan, C., Best, A., Kappl, M., Koynov, K., et al. (2021). Fabrication of Anticounterfeiting Nanocomposites with Multiple Security Features via Integration of a Photoresponsive Polymer and Upconverting Nanoparticles. Advanced Functional Materials, 31(37): 2103908. doi:10.1002/adfm.202103908.