SERS-active linear barcodes by microfluidic-assisted patterning

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:584

Article

Pekdemir, Sami^1,2  Ipekci, Hasan Hueseyin^2,3  Serhatlioglu, Murat⁴  Elbuken, Caglar^4,5  Onses, M. Serdar^1,2,4 

[1] Erciyes Univ, Dept Mat Sci & Engn, TR-38039 Kayseri, Turkey

[2] ERNAM Erciyes Univ, Nanotechnol Applicat & Res Ctr, TR-38039 Kayseri, Turkey

[3] Necmettin Erbakan Univ, Fac Engn & Architecture, Met & Mat Engn, TR-42090 Konya, Turkey

[4] Bilkent Univ, Inst Mat Sci & Nanotechnol, UNAM Natl Nanotechnol Res Ctr, TR-06800 Ankara, Turkey

[5] Univ Oulu, Fac Med, Fac Biochem & Mol Med, Oulu 90014, Finland

关键词: Anti-counterfeiting;    SERS;    Plasmonics;    Microfluidics;    Colloidal nanoparticles;   

DOI  :  10.1016/j.jcis.2020.09.087

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free