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SERS-active linear barcodes by microfluidic-assisted patterning.

Sami Pekdemir¹, Hasan Hüseyin Ipekci², Murat Serhatlioglu³

¹Department of Materials Science and Engineering, Erciyes University, Kayseri 38039, Turkey; ERNAM - Erciyes University Nanotechnology Application and Research Center, Kayseri, 38039, Turkey.

Journal of Colloid and Interface Science

|October 9, 2020

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This summary is machine-generated.

Researchers developed a new method for creating microscopic linear barcodes using microfluidics and gold nanoparticles. These barcodes offer enhanced security features for anti-counterfeiting applications.

Area of Science:

Materials Science
Nanotechnology
Analytical Chemistry

Background:

Microscopic linear barcodes are crucial for information security and anti-counterfeiting.
Existing methods face challenges in scalability, cost, and complexity.

Purpose of the Study:

To present a novel, low-cost, and scalable method for fabricating complex microscopic linear barcodes.
To enable visualization of these barcodes using Raman microscopy.

Main Methods:

Utilizing microfluidic channels as molds to create end-grafted polymer patterns on substrates.
Employing these patterns for area-selective binding of colloidal gold nanoparticles to form plasmonic arrays.
Depositing multiple taggant molecules onto plasmonic arrays using a second microfluidic mold.

Keywords:

Anti-counterfeiting Colloidal nanoparticles Microfluidics Plasmonics SERS

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Main Results:

Fabrication of microscopic linear barcodes with bar widths as small as 10 μm and lengths around 100 μm.
Generation of unique Raman fingerprints enhanced by underlying plasmonic nanoparticles.
Successful integration of geometric and chemical security layers for high complexity.

Conclusions:

The developed additive, scalable, and inexpensive approach enables robust fabrication of advanced microscopic linear barcodes.
This method offers significant potential for information security and anti-counterfeiting applications.
The approach is adaptable to various colloidal nanomaterials and diverse applications.