SERS-active linear barcodes by microfluidic-assisted patterning
SERS-active linear barcodes by microfluidic-assisted patterning
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DOI：
10.1016/j.jcis.2020.09.087
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发表时间：
2021-02-15
影响因子：
9.9
通讯作者：
Onses, M. Serdar
中科院分区：
文献类型：
--
作者：
Pekdemir, Sami;Ipekci, Hasan Hueseyin;Onses, M. Serdar
简单、低成本、坚固耐用和可扩展的微型线性条形码的制造具有高复杂性和多认证层，对于新兴的信息安全和防伪应用至关重要。这份手稿提供了一种新的方法来制造可以在拉曼显微镜下可视化的微型线性条形码。微流控通道被用作模具，以在衬底上产生端接聚合物的线性图案。这些图案用作胶体金纳米颗粒区域选择性结合的模板，从而形成等离子体阵列。通过第二个微流控模具在等离子体阵列上沉积多个标记剂分子，产生具有独特拉曼指纹的线性条形码，该指纹被底层的等离子体纳米颗粒增强。条码的宽度小至10微米，条码总长度约为100微米。几何和化学安全层的同时使用提供了高度的复杂性，挑战条码的假冒。这种方法的可加性、可伸缩性和廉价的特性可以很容易地适应不同的胶体纳米材料和应用。(C)2020 Elsevier Inc.保留所有权利。
Simple, low-cost, robust, and scalable fabrication of microscopic linear barcodes with high levels of complexity and multiple authentication layers is critical for emerging applications in information security and anti-counterfeiting. This manuscript presents a novel approach for fabrication of microscopic linear barcodes that can be visualized under Raman microscopy. Microfluidic channels are used as molds to generate linear patterns of end-grafted polymers on a substrate. These patterns serve as templates for area-selective binding of colloidal gold nanoparticles resulting in plasmonic arrays. The deposition of multiple taggant molecules on the plasmonic arrays via a second microfluidic mold results in a linear barcode with unique Raman fingerprints that are enhanced by the underlying plasmonic nanoparticles. The width of the bars is as small as 10 mu m, with a total barcode length on the order of 100 mu m. The simultaneous use of geometric and chemical security layers provides a high level of complexity challenging the counterfeiting of the barcodes. The additive, scalable, and inexpensive nature of the presented approach can be easily adapted to different colloidal nanomaterials and applications. (C) 2020 Elsevier Inc. All rights reserved.