A novel method for creating nanopatterns on micropillar-structured surfaces using nanowelding technology has been developed for security identification. This method employs common substrates such as polyethylene films, glass wafers, Si wafers, and curved surfaces. Chromium (Cr) is first deposited to enhance adhesion, followed by an ultra-thin metal adhesive layer. Nanopatterns are then embedded using nanowelding. The resulting nanostructures are evaluated for their morphology, cross-sections, 3D images, crystalline structures, and compositions. For the first time, nanopatterns on micropillar-structured surfaces are used as security patterns, which are characterized in three stages: optical microscopy for preliminary judgment, scanning electron microscopy for detailed observation, and spectrometer analysis for enhanced security patterns. These security patterns are suitable for valuable products like branded wines, watches, and bags, and have potential applications in semiconductor and transparent electrodes, and security identification codes. -Scientific Journal cover design by scapiens.
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
