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Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

Abstract

Surface-enhanced Raman scattering (SERS) spectroscopy is an extremely sensitive analytical technique that is capable of identifying the vibration signatures of target molecules up to single-molecule sensitivity. In this work, the ultrahigh sensitivity of SERS has been made through the immobilization of sharp-edges specific nanoparticles – so-called gold multibranched NPs (AuMs) on the silver grating surface through the biphenyl dithiol. This approach allows combining the extremely high SERS enhancement factor (better, that in the case of AuMs immobilized on the flat Ag film) with perfect reproducibility of Raman signal. The grating was created on the polymer substrate using the excimer laser modification and further metal deposition and has an „active“ area 5×10 mm2, enabling the macroscale SERS substrate preparation. The wet-chemistry synthesized AuMs were then immobilized on the grating surface and the produced structure allows the SERS measurements with portable Raman spectrophotometer. Prepared structures were checked using the AFM, UV-Vis, and Raman spectroscopy techniques.

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Publication details

The article was received on 22 Mar 2017, accepted on 07 May 2017 and first published on 11 May 2017


Article type: Paper
DOI: 10.1039/C7CP01828B
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

    Y. Kalachyova, D. Mares, V. Jerabek, P. Ulbrich, L. Lapcak, V. Švorčík and O. Lyutakov, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP01828B

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