Colorful, magnetic Janus balls could help foil counterfeiters (video)

(American Chemical Society) Counterfeiters who sell knockoffs of popular shoes, handbags and other items are becoming increasingly sophisticated, forcing manufacturers to find new technologies to stay one step ahead. Now, researchers reporting inACS Nano have developed tiny " Janus balls " that show their colored side under a magnetic field. These microparticles could be useful in inks for anti-counterfeiting tags, which could be verified with an ordinary magnet, the researchers say.
Source: EurekAlert! - Social and Behavioral Science - Category: International Medicine & Public Health Source Type: news