What Types of Nanoparticles are Used in Security Inks?
A variety of nanoparticles are used to enhance the properties of security inks:
Quantum dots: These semiconductor nanoparticles emit light when exposed to UV light, producing bright, stable colors. Metal nanoparticles: Silver and gold nanoparticles provide unique optical properties, such as plasmonic effects, which can be used for anti-counterfeiting applications. Magnetic nanoparticles: These can be detected using magnetic sensors, adding another layer of security.
