SERS Labels for Optical Anticounterfeiting: Structure, Fabrication, and Performance

摘要

Developing new anticounterfeit technologies with good robustness, highsafety index, strong readability, and low cost is highly demanded but challenging.In recent years, anticounterfeiting labels by surface-enhancedRaman spectroscopy (SERS) have drawn great attention due to the molecularencoding, highly accurate identification, large coding capacity, and so on.Focusing on several basic elements in SERS anticounterfeiting, the SERSanticounterfeiting labels’ structure, the fabrication strategies, and theirperformances are summarized and commented in detail based on three maincategories of SERS labels (SERS spectra, SERS images, and SERS codes).Moreover, despite the great advances achieved till now, SERS labels foranticounterfeiting still suffer from some limitations. Thus, the current challengesand the perspective of the SERS labels in anticounterfeiting are alsodiscussed, aiming to give a comprehensive understanding and some validguidelines for the development of SERS labels in anticounterfeiting.