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Home NEWS Science News Chemistry

Attomolar sensing: Fabrication of surface-enhanced raman scattering substrate

Bioengineer by Bioengineer
September 6, 2025
in Chemistry
Reading Time: 2 mins read
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In the 1970s, Fleischmann, the scientist in British, discovered that on noble metallic nanostructure, the Raman scattering of pyridine was enhanced hundreds-hold. Then, the scientists attributed the enhancement to the localized electric field highly amplified near the surface of specific noble metallic nanostructures. Thus, this phenomenon was termed surface-enhanced Raman scattering (SERS). Currently, although the enhancement mechanism of SERS is still in the debate, the SERS exhibits incomparable abilities of monitoring and sensing with high sensitivity in diverse fields including environment, biomedicine, food security, archaeology, soil components. The femtosecond laser processing increasingly attracting attention to be used for fabrication of the SERS substrates due to its versatility, flexibility and high resolution.

In a new paper published in Light Advanced Manufacturing, a team of scientists, led by Prof. Koji Sugioka and Dr. Shi Bai from Advanced Laser Processing Research Team, RIKEN Center for Advanced Photonics, RIKEN, Japan reviewed the fabrication methods of highly sensitive SERS substrates by femtosecond laser processing and their applications. The paper firstly gave the commonly used criteria for evaluation of SERS substrates and summarized the calculation methods of enhancement factor. The typical technologies of femtosecond laser processing for the fabrication of SERS substrates were then introduced. To realize the attomolar sensing with the SERS substrates, the authors highlighted the several strategies employing synergistic enhancement effects. Additionally, the recent applications of SERS for real-time sensing based on microfluidic chips and biomedicine including cell recognition, deoxyribonucleic acid and protein identification were introduced. The authors have concluded that further efforts for not only developing the next generation of SERS substrates with higher enhancement and lower detection limits but also overcoming unresolved issues such as a universal method for calculating the enhancement factor and the stability and robustness of SERS substrates will continue.

###

Media Contact
Koji Sugioka
[email protected]

Related Journal Article

http://dx.doi.org/10.37188/lam.2021.013

Tags: Attomolar sensingChemistry/Physics/Materials SciencesEnhanced spectroscopy techniquesFemtosecond laser processingNanostructured substratesOpticsSurface-enhanced Raman scattering (SERS)
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