Unclonable Chameleon Security Inks

不可克隆变色龙安全油墨

• 批准号: 2717153
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2717153
• 关键词: Unclonable; Chameleon; Security; Inks

Project BackgroundLanthanide complexes are widely used in luminescent security inks due to their unique and robust photo-physical properties and they can also easily be engineered to undergo circularly polarised luminescence (CPL). However, chiral CPL signals have not yet been exploited as means in advanced security inks. Until our recent break-through in CPL measurement technology that enables rapid, high-throughput, security ink verification, the technology used to measure CPL has been somewhat stagnant. Project DescriptionThe synthetic aspect of this project is dedicated to develop blended polymer encapsulated organic emitters and chiral Ln(III)complexes to create multi-layered unclonable QR code patterns. Novel CPL-active Ln(III) complexes with cumulative expertise based strategies to maximise gem and increase CPB (CPL brightness) will be synthesized as part of the project. Using a commercially available polymer matrix that is already part or will be suitable to be incorporated into modern 'plastic' banknotes as a transparent layer a lithographically etched chiral separator can be embedded into the banknote alongside the luminescent dye formula. Therefore, using a handheld time resolved detector, also developed as part of this project using a novel polarized Thor labs camera, and the 'secret etched polarizer' (the structure of the Big Ben is perfect) in combination with a unique dye mixture formula can result in a unique fingerprint tri-colour security dye encoding 3 chiroptical QR codes in one. A simple fold over of this separator unit onto the UV illuminated banknote will result in colour change of the security dye that can further be changed to a third hidden colour by time gating the red Europium component (unique chiral/spectral fingerprint and ms lifetime) separating it from the short lived (ns) organic green or blue fluorophores. These combined are unprecedented, resulting in 5 tiers of unclonable hidden (invisible to the naked eye) security feature. This project therefore combines polymer science, lithography and dye formulation of organic and chiral lanthanide emitters rendering it to be a truly multidisciplinary research project.Our newly developed all solid-state (SS-)CPL spectrometer is a paradigm shift in CPL spectroscopy and allows the global research community and the public to harness the so far uncharted benefits of CPL. This renders this unique platform extremely desirable by any third party interested in authentication and protection of global commerce.Once a suitable dye, combining organic short-lived fluorescence green/blue emitters with chiral (CPL active) red/green (Terbium/Europium) long-lived emitters is formulated and embedded into transparent polymer matrix as a thin layer the possibilities are endless to create infinite number of 5 layer security QR codes and authentication stamps/logos allowing the next chapter of intelligent unclonable security authentication to be written.

项目背景稀土配合物由于其独特和稳健的光物理性质而广泛用于发光安全油墨，并且它们还可以容易地被设计成进行圆偏振发光（CPL）。然而，手性CPL信号尚未被开发作为先进安全油墨中的手段。直到我们最近在CPL测量技术上取得突破，实现快速，高通量，安全油墨验证，用于测量CPL的技术一直有点停滞不前。项目描述本项目的合成方面致力于开发混合聚合物封装的有机发光体和手性Ln（III）配合物，以创建多层不可克隆的QR码图案。作为该项目的一部分，将合成新型CPL活性Ln（III）复合物，这些复合物具有基于累积专业知识的策略，以最大限度地提高宝石和提高CPB（CPL亮度）。使用市售的聚合物基质，其已经是部分或将适合于作为透明层并入现代“塑料”钞票中，光刻蚀刻的手性分离器可以与发光染料配方一起嵌入钞票中。因此，使用手持式时间分辨探测器，也是作为该项目的一部分开发的，使用新型偏振Thor实验室相机，以及“秘密蚀刻偏振器”（大本钟的结构是完美的）与独特的染料混合物配方相结合，可以产生独特的指纹三色安全染料，编码3个手性QR码。将该分离器单元简单折叠到UV照射的钞票上将导致安全染料的颜色变化，该颜色变化可以通过时间选通红色铕组分（独特的手性/光谱指纹和ms寿命）而进一步改变为第三隐藏颜色，从而将其与短寿命（ns）有机绿色或蓝色荧光团分离。这些组合是前所未有的，导致5层不可克隆的隐藏（肉眼不可见）安全功能。因此，该项目结合了聚合物科学，光刻和染料配方的有机和手性镧系元素发射体，使其成为一个真正的多学科研究项目。我们新开发的全固态（SS-）CPL光谱仪是CPL光谱学的一个范式转变，它允许全球研究社区和公众利用CPL迄今为止未知的好处。这使得任何第三方都非常希望这个独特的平台对认证和保护全球贸易感兴趣。一旦合适的染料，将有机短寿命荧光绿色/蓝色发光体与手性（CPL激活）红色/绿色（铽/铕）长寿命发射器被配制并嵌入透明聚合物基质中作为薄层，创造无限数量的5层安全QR码和认证印章的可能性是无限的。标志允许智能不可克隆的安全认证的下一章被写入。