This paper describes a novel method of counterfeit prevention based on 3D printing of optical-active structures with gelated shear-thinning inks based on latex nanoparticles with different charge. Modified with dyes, they could be implemented as optical-active elements available to be imprinted due to their shear-thinning properties. According to these properties, described optical-active structures could be imprinted not only on surfaces with simple geometry, but also on more complicated (e.g. angles, coarse surfaces) which is very useful in increasing of protection power of this method.
Рябченко Е.О., Кривошапкина Е.Ф., Стаценко Т.Г. (науч. рук. Морозова С.М.) Novel nanocolloidal inks for 3D-printing based on positively and negatively charged latex nanoparticles // Сборник тезисов докладов конгресса молодых ученых. Электронное издание. – СПб: Университет ИТМО, [2021]. URL: https://kmu.itmo.ru/digests/article/6216