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Merdalimova AA, Rudakovskaya PG, Ermatov TI, Smirnov AS, Kosolobov SS, Skibina JS, Demina PA, Khlebtsov BN, Yashchenok AM, Gorin DA. SERS Platform Based on Hollow-Core Microstructured Optical Fiber: Technology of UV-Mediated Gold Nanoparticle Growth. BIOSENSORS 2021; 12:19. [PMID: 35049647 PMCID: PMC8774134 DOI: 10.3390/bios12010019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/27/2021] [Accepted: 12/28/2021] [Indexed: 11/19/2022]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a powerful technique for biosensing. However, SERS analysis has several concerns: the signal is limited by a number of molecules and the area of the plasmonic substrate in the laser hotspot, and quantitative analysis in a low-volume droplet is confusing due to the change of concentration during quick drying. The usage of hollow-core microstructured optical fibers (HC-MOFs) is thought to be an effective way to improve SERS sensitivity and limit of detection through the effective irradiation of a small sample volume filling the fiber capillaries. In this paper, we used layer-by-layer assembly as a simple method for the functionalization of fiber capillaries by gold nanoparticles (seeds) with a mean diameter of 8 nm followed by UV-induced chloroauric acid reduction. We also demonstrated a simple and quick technique used for the analysis of the SERS platform formation at every stage through the detection of spectral shifts in the optical transmission of HC-MOFs. The enhancement of the Raman signal of a model analyte Rhodamine 6G was obtained using such type of SERS platform. Thus, a combination of nanostructured gold coating as a SERS-active surface and a hollow-core fiber as a microfluidic channel and a waveguide is perspective for point-of-care medical diagnosis based on liquid biopsy and exhaled air analysis.
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Affiliation(s)
- Anastasiia A. Merdalimova
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel str, 121205 Moscow, Russia; (P.G.R.); (T.I.E.); (A.M.Y.)
| | - Polina G. Rudakovskaya
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel str, 121205 Moscow, Russia; (P.G.R.); (T.I.E.); (A.M.Y.)
| | - Timur I. Ermatov
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel str, 121205 Moscow, Russia; (P.G.R.); (T.I.E.); (A.M.Y.)
| | - Alexander S. Smirnov
- Center for Design, Manufacturing and Materials, Skolkovo Institute of Science and Technology, 1 Nobel str, 121205 Moscow, Russia; (A.S.S.); (S.S.K.)
| | - Sergey S. Kosolobov
- Center for Design, Manufacturing and Materials, Skolkovo Institute of Science and Technology, 1 Nobel str, 121205 Moscow, Russia; (A.S.S.); (S.S.K.)
| | - Julia S. Skibina
- SPE LLC Nanostructured Glass Technology, 101 50 Let Oktjabrja str, 410033 Saratov, Russia;
| | - Polina A. Demina
- FSRC “Crystallography and Photonics” RAS, 59 Leninsky pr., 119333 Moscow, Russia;
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya str. 16/10, 117997 Moscow, Russia
| | - Boris N. Khlebtsov
- Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Institute of Biochemistry and Physiology of Plants and Microorganisms, 410049 Saratov, Russia;
| | - Alexey M. Yashchenok
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel str, 121205 Moscow, Russia; (P.G.R.); (T.I.E.); (A.M.Y.)
| | - Dmitry A. Gorin
- Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 3 Nobel str, 121205 Moscow, Russia; (P.G.R.); (T.I.E.); (A.M.Y.)
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