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Sensors 2018, 18(2), 521; https://doi.org/10.3390/s18020521

Silver Eco-Solvent Ink for Reactive Printing of Polychromatic SERS and SPR Substrates

1
Department of Materials Science and Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1, bld. 73, 119991 Moscow, Russia
2
Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, bld. 3, 143026 Moscow, Russia
3
National University of Science and Technology MISiS, Leninsky prospect 4, 119049 Moscow, Russia
4
Department of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum 44801, Germany
*
Author to whom correspondence should be addressed.
Received: 16 January 2018 / Revised: 3 February 2018 / Accepted: 7 February 2018 / Published: 9 February 2018
(This article belongs to the Special Issue Spectroscopy Based Sensors)
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Abstract

A new reactive ink based on a silver citrate complex is proposed for a photochemical route to surface-enhanced Raman spectroscopy active substrates with controllable extinction spectra. The drop-cast test of the ink reveals homogeneous nucleation of silver and colloid particle growth originating directly from photochemical in situ reduction in droplets, while the following evaporation of the deposited ink produces small nano- and micron-size particles. The prepared nanostructures and substrates were accurately characterized by electron microscopy methods and optical extinction spectroscopy. Varying the duration of UV irradiation allows tuning the morphology of individual silver nanoparticles forming hierarchical ring structures with numerous “hot spots” for most efficient Raman enhancement. Raman measurements of probe molecules of rhodamine 6G and methylene blue reached the largest signal enhancement of 106 by the resonance effects. View Full-Text
Keywords: reactive ink; photoreaction; silver nanostructures; surface-enhanced Raman scattering; plasmon resonance reactive ink; photoreaction; silver nanostructures; surface-enhanced Raman scattering; plasmon resonance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Dustov, M.; Golovina, D.I.; Polyakov, A.Y.; Goldt, A.E.; Eliseev, A.A.; Kolesnikov, E.A.; Sukhorukova, I.V.; Shtansky, D.V.; Grünert, W.; Grigorieva, A.V. Silver Eco-Solvent Ink for Reactive Printing of Polychromatic SERS and SPR Substrates. Sensors 2018, 18, 521.

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