Inkjet Printing of Biocompatible Luminescent Organic Crystals for Optical Encryptionстатья
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
Аннотация:The design and fabrication of optical security marks are of great importance for information encryption and data protection. Herein, biocompatible marks with excellent optical properties, printed easily on arbitrary surfaces, remain a challenge. Here, we report on the design of a series of transparent organic inks based on Gewald’s 2-aminothiophene derivatives, which are utilized then for inkjet printing of large-scale invisible images with 60 μm resolution on arbitrary substrates. The encryption regime is provided through a combination of organic inks possessing different photoluminescence (PL) spectra ranging from 584 to 625 nm. The decoding of such images is achieved in the PL regime manually and can be read with the naked eye upon ultraviolet radiation. The high biocompatibility of the inks, confirmed by the epithelial-like cell line of mouse cutaneous melanoma and mouse embryonic fibroblasts, paves the way to scalable inkjet printing of biocompatible images for optical encryption and goods protection.