SERS substrates based on opal films with gold coating
M. O. Astafurov, 
E. V. Perevedentseva,
N. N. Melnik,
A. E. Baranchikov,
S. G. Dorofeev,
A. A. Ezhov,
A. V. Grigorieva,
S. O. Klimonsky
E. V. Perevedentseva,
N. N. Melnik,
A. E. Baranchikov,
S. G. Dorofeev,
A. A. Ezhov,
A. V. Grigorieva,
S. O. Klimonsky https://doi.org/10.17586/2220-8054-2024-15-6-902-909
Abstract
Substrates for Surface-Enhanced Raman Spectroscopy (SERS) were fabricated by gold sputtering onto surface of synthetic opal films and their characteristics were studied at wavelengths λ = 532 and 785 nm. Synthetic opal films were fabricated by self-assembly of spherical SiO2 particles on vertical substrates. It was found that at the concentration of the analyte methylene blue equal to 10−5 M the intensity of SERS at the wavelength of 785 nm increased with increasing amount of sputtered gold up to a certain optimal thickness exceeding 35 nm, while at the concentration of 10−6 M this dependence was not observed. It is assumed that this is due to the complex amount-dependent morphology of the sputtered gold coating and the presence of “hot spots” of different strengths. For the best samples at a wavelength of λ = 785 nm, the SERS enhancement factor was of 7·104 and a detection limit for methylene blue reached 3·10−7 M that exceeds the results published for similar substrates previously. The SERS parameters obtained for λ = 532 nm were less attractive, despite the additional enhancement due to this wavelength was at the edge of the photonic stop-band.
Supporting agencies: The authors are grateful to the Russian Science Foundation for financial support of the present research (Grant No. 23-23-00252). This work was partially performed using the scanning probe microscope NT-MDT NTEGRA Prima upgraded up to NT-MDT NTEGRA II by Nova SPb from Program for the Development of Moscow State University. Scanning electron microscopy was performed using the equipment of the JRC PMR IGIC RAS. The authors also thank Daniil Kozlov for assistance with electron microscopy.
About the Authors
M. O. Astafurov
Lomonosov Moscow State University
Russian Federation
Russian Federation
Mikhail O. Astafurov
119991 Leninskie gory 1, bld. 3, Moscow
E. V. Perevedentseva
P. N. Lebedev Physical Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Elena V. Perevedentseva
Leninskii prospekt 53, 119991, Moscow
N. N. Melnik
P. N. Lebedev Physical Institute of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nikolay N. Melnik
Leninskii prospekt 53, 119991, Moscow
A. E. Baranchikov
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Russian Federation
Russian Federation
Alexander E. Baranchikov
Leninskii prospekt 31, 119071, Moscow
S. G. Dorofeev
Lomonosov Moscow State University
Russian Federation
Russian Federation
Sergey G. Dorofeev
119991 Leninskie gory 1, bld. 3, Moscow
A. A. Ezhov
Lomonosov Moscow State University
Russian Federation
Russian Federation
Alexander A. Ezhov
119991 Leninskie gory 1, bld. 3, Moscow
A. V. Grigorieva
Lomonosov Moscow State University
Russian Federation
Russian Federation
Anastasia V. Grigorieva
119991 Leninskie gory 1, bld. 3, Moscow
S. O. Klimonsky
Lomonosov Moscow State University
Russian Federation
Russian Federation
Sergey O. Klimonsky
119991 Leninskie gory 1, bld. 3, Moscow
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Review
For citations:
Astafurov M.O., Perevedentseva E.V., Melnik N.N., Baranchikov A.E., Dorofeev S.G., Ezhov A.A., Grigorieva A.V., Klimonsky S.O. SERS substrates based on opal films with gold coating. Nanosystems: Physics, Chemistry, Mathematics. 2024;15(6):902-909. https://doi.org/10.17586/2220-8054-2024-15-6-902-909
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