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Optical nanomaterials have been widely used in anticounterfeiting applications. There have been significant developments powered by recent advances in material science, printing technologies, and the availability of smartphone‐based decoding technology. Recent progress in this field is surveyed, including the availability of optical reflection, absorption, scattering, and luminescent nanoparticles...
In article number 1901430, Jiajia Zhou, Dayong Jin, and co‐workers survey the progress in optical nanomaterial‐based anticounterfeiting applications. It is pointed out that the advances in lanthanide‐doped upconversion nanoparticles and the development of portable devices will lead to the next‐generation of anticounterfeiting technologies.
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