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Screen-printed nanoparticles as anti-counterfeiting tags

机译:丝网印刷的纳米颗粒作为防伪标签

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Metallic nanoparticles with different physical properties have been screen printed as authentication tags on different types of paper. Gold and silver nanoparticles show unique optical signatures, including sharp emission bandwidths and long lifetimes of the printed label, even under accelerated weathering conditions. Magnetic nanoparticles show distinct physical signals that depend on the size of the nanoparticle itself. They were also screen printed on different substrates and their magnetic signals read out using a magnetic pattern recognition sensor and a vibrating sample magnetometer. The novelty of our work lies in the demonstration that the combination of nanomaterials with optical and magnetic properties on the same printed support is possible, and the resulting combined signals can be used to obtain a user-configurable label, providing a high degree of security in anti-counterfeiting applications using simple commercially-available sensors.
机译:具有不同物理特性的金属纳米粒子已被丝网印刷为身份验证标签在不同类型的纸张上。金和银纳米粒子显示出独特的光学特征,即使在加速的气候条件下,也具有清晰的发射带宽和较长的印刷标签寿命。磁性纳米粒子显示出不同的物理信号,这些信号取决于纳米粒子本身的大小。它们还被丝网印刷在不同的基板上,并使用磁性模式识别传感器和振动样品磁力计读出其磁信号。我们工作的新颖性在于证明,可以在同一印刷载体上结合具有光学和磁性特性的纳米材料,并且所产生的结合信号可以用于获得用户可配置的标签,从而在使用中提供高度的安全性。使用简单的市售传感器进行防伪应用。

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