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Open AccessArticle

Microstructured Waveguides with Polyelectrolyte-Stabilized Gold Nanostars for SERS Sensing of Dissolved Analytes

1
Remote Controlled Theranostic Systems Lab, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia
2
Institute of Chemistry, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia
3
Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov13, 410049 Saratov, Russia
4
SPС Nanostructured Glass Technology Ltd., 50 years of October av. 101, 410033 Saratov, Russia
*
Author to whom correspondence should be addressed.
Materials 2018, 11(5), 734; https://doi.org/10.3390/ma11050734
Received: 5 April 2018 / Revised: 28 April 2018 / Accepted: 3 May 2018 / Published: 5 May 2018
(This article belongs to the Special Issue Photonic Crystals for Chemical Sensing and Biosensing)
A sensor based on microstructured waveguides (MWGs) with a hollow core inner surface covered with polyelectrolyte-layer-stabilized gold nanostars was developed for the SERS sensing of dissolved analytes. A polyelectrolyte-layer coating over the inner surface of glass cladding served as a spacer, reducing nonlinear optical effects in the glass near plasmonic hotspots of nanoparticles, as a stabilizing agent for thermodynamically unstable gold nanostars and as an optical coating for the fine-tuning of MWG bandgaps. This approach can be used to construct different kinds of SERS sensors for dissolved analytes, providing conservation, the prevention of coagulation, and the drying of a liquid sample for the time required to record the signal. View Full-Text
Keywords: microstructures waveguide; SERS; fiber-enhanced Raman scattering microstructures waveguide; SERS; fiber-enhanced Raman scattering
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Bratashov, D.N.; Burmistrova, N.A.; Bondarenko, S.D.; Khlebtsov, B.N.; Atkin, V.S.; Shuvalov, A.A.; Zanishevskaya, A.A.; Skibina, Y.S.; Goryacheva, I.Y. Microstructured Waveguides with Polyelectrolyte-Stabilized Gold Nanostars for SERS Sensing of Dissolved Analytes. Materials 2018, 11, 734.

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