荧光
材料科学
日光
洋红
青色
光电子学
纳米技术
墨水池
光学
复合材料
物理
作者
Buchaiah Gollapelli,Seeta Rama Raju Ganji,T. Arun Kumar,V. Jayalakshmi
标识
DOI:10.1016/j.molliq.2022.119952
摘要
Herein, we have shown security codes based on an advanced anti-counterfeiting material that are difficult to duplicate and are substantially distinct from the present technology. The anti-counterfeiting material can be made by dispersing green synthesized chlorophyll from spinach leaves into cholesteric liquid crystal (Red, Green and Blue reflections). The resultant anti-counterfeiting material reflects color in daylight (Red/Green/ Blue) due to the reflection property of CLCs and magenta color in UV light due to the fluorescence property of chlorophyll. Furthermore, we have shown that anti-counterfeiting material confined to spherical microdroplets produced by glass capillary microfluidic approach exhibit dual-mode display and security ink properties under daylight and ultraviolet light, including authenticate/non-authenticate QR codes, implying their potential applications in anti-counterfeiting technologies for the protection of valuable objects. These color variations are easily detectable in real time and may be used to create anti-counterfeiting patterns with color changes in both reflection and fluorescence modes. Because of the easy technique, we believe this can give a new platform for numerous security and color-based applications that is more cost-effective and environmentally friendly than traditional approaches.
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