University of Oulu

Pekdemir, S., Ipekci, H. H., Serhatlioglu, M., Elbuken, C., & Onses, M. S. (2021). SERS-active linear barcodes by microfluidic-assisted patterning. Journal of Colloid and Interface Science, 584, 11–18.

SERS-active linear barcodes by microfluidic-assisted patterning

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Author: Pekdemir, Sami1,2; Ipekci, Hasan Hüseyin2,3; Serhatlioglu, Murat4;
Organizations: 1Department of Materials Science and Engineering, Erciyes University, Kayseri 38039, Turkey
2ERNAM – Erciyes University Nanotechnology Application and Research Center, Kayseri, 38039, Turkey
3Metallurgical and Materials Engineering, Faculty of Engineering and Architecture, Necmettin Erbakan University, Konya, 42090, Turkey
4UNAM–National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey
5Faculty of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Oulu, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Elsevier, 2021
Publish Date: 2022-09-28


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 μm, with a total barcode length on the order of 100 μm. 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.

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Series: Journal of colloid and interface science
ISSN: 0021-9797
ISSN-E: 1095-7103
ISSN-L: 0021-9797
Volume: 584
Pages: 11 - 18
DOI: 10.1016/j.jcis.2020.09.087
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This work was supported by TUBITAK under Grant No. 115M220. MSO and CE acknowledge the support from The Science Academy, Turkey through the Young Scientist Award Program.
Copyright information: © 2020 Elsevier Inc.This manuscript version is made available under the CC-BY-NC-ND 4.0 license