Encoded beads for electrochemical identification
Encoded beads for electrochemical identification
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DOI：
10.1021/ac034411k
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发表时间：
2003-09-01
影响因子：
7.4
通讯作者：
Rivas, G
中科院分区：
文献类型：
--
作者：
Wang, J;Liu, GD;Rivas, G
基于在聚苯乙烯微球内封装不同量子点（QD）的编码氧化还原微珠已被开发用于电化学识别。通过将不同金属示踪剂依次镀入宿主膜的孔隙中制备的编码氧化还原棒也已被设计出来。通过掺入不同预定水平的多种金属标记物，这种氧化还原编码颗粒会产生大量可识别的伏安特征，因此为商品的隐蔽标记提供了很大的希望。所得伏安特征与预定负载比相关性良好，表明封装过程具有可重复性。正如有效真伪检测所期望的那样，基于量子点的“识别层”可重复地从商品包装上浇铸和去除，以显示其独特的伏安曲线。影响此类识别层制备的因素已得到优化。
Encoded redox beads, based on the encapsulation of different quantum dots (QD) within polystyrene microspheres, have been developed for electrochemical identification. Encoded redox rods, prepared by sequential plating of different metal tracers into the pores of a host membrane, have also been designed. By incorporating different predetermined levels of multiple metal markers, such redox-encoded particles lead to a large number of recognizable voltammetric signatures and, hence, offer great promise for covert tagging of commercial products. The resulting voltammetric signatures correlate well with the predetermined loading ratio, indicating a reproducible encapsulation process. As desired for effective authenticity testing, QD-based "identification layers" were reproducibly cast and removed from packages of commercial products to display their distinct voltammetric profiles. Factors affecting the preparation of such identification layers were optimized.