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8 results on '"Afanasev, Konstantin"'

2. Plasmon localization and giant fields in holographic metasurface for SERS sensors

Author

Sarychev, Andrey K., Ivanov, Andrey, Lagarkov, Andrey N., Barbillon, Gregory, Bykov, Igor, Ryzhikov, Ilya, Afanasev, Konstantin, Bakholdin, Nikita, Mikhailov, Mikhail, Smyk, Alexander, Shurygin, Alexander, and Shalygin, Alexander

Subjects
Physics - Optics
Abstract

We present SERS-active metal holographic metasurfaces fabricated from metal periodical nanograting deposited on a dielectric substrate. The metasurface consists of a modulated dielectric, which is covered by a thin silver layer. The metasurface operates as an open plasmon resonator. The theory of plasmons excited in the open resonator formed by a metal nanograting is presented. The large local electromagnetic field is predicted for optical frequencies. The excitation of plasmons is experimentally demonstrated in the metasurface designed on a 4-inch Si wafer. The enhancement of the local electric field results in surface-enhanced Raman scattering (SERS). To investigate the SERS effect, the metasurfaces are covered by molecules of 4-mercaptophenylboronic acid, which form covalent bonds with the silver nanolayer and serve as a proof-of-concept. Finally, we obtain a detection limit of 230 nM for molecules of 4-mercaptophenylboronic acid., Comment: 12 pages, 11 figures, 67 references

Published
2021

3. Human Angiotensin I-Converting Enzyme Produced by Different Cells: Classification of the SERS Spectra with Linear Discriminant Analysis

Author

Boginskaya, Irina, primary, Safiullin, Robert, additional, Tikhomirova, Victoria, additional, Kryukova, Olga, additional, Nechaeva, Natalia, additional, Bulaeva, Naida, additional, Golukhova, Elena, additional, Ryzhikov, Ilya, additional, Kost, Olga, additional, Afanasev, Konstantin, additional, and Kurochkin, Ilya, additional

Published
2022
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4. Plasmon Localization and Giant Fields in an Open-Resonator Metasurface forSurface-Enhanced-Raman-Scattering Sensors

Author

Sarychev, Andrey K., primary, Ivanov, Andrey, additional, Lagarkov, Andrey N., additional, Ryzhikov, Ilya, additional, Afanasev, Konstantin, additional, Bykov, Igor, additional, Barbillon, Grégory, additional, Bakholdin, Nikita, additional, Mikhailov, Mikhail, additional, Smyk, Alexander, additional, Shurygin, Alexander, additional, and Shalygin, Alexander, additional

Published
2022
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5. SERS Sensor for Human Glycated Albumin Direct Assay Based on Machine Learning Methods.

Author

Slipchenko, Ekaterina A., Boginskaya, Irina A., Safiullin, Robert R., Ryzhikov, Ilya A., Sedova, Marina V., Afanasev, Konstantin N., Nechaeva, Natalia L., Kurochkin, Ilya N., Merzlikin, Alexander M., and Lagarkov, Andrey N.

Subjects
MACHINE learning, FISHER discriminant analysis, DATA augmentation, SERUM albumin, SERS spectroscopy, RANDOM forest algorithms
Abstract

In this study, a non-labeled sensor system for direct determining human glycated albumin levels for medical application is proposed. Using machine learning methods applied to surface-enhanced Raman scattering (SERS) spectra of human glycated albumin and serum human albumin enabled the avoidance of complex sample preparation. By implementing linear discriminant analysis and regularized linear regression, classification and regression problems were solved based on the spectra obtained as a result of the experiment. The results show that, coupled with data augmentation and a special cross-validation procedure, the methods we employed yield better results in the corresponding tasks in comparison with popular random forest methods and the support vector method. The results show that SERS, in combination with machine learning methods, can be a powerful and effective tool for the simple and direct assay of protein mixtures. [ABSTRACT FROM AUTHOR]

Published
2022
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6. Human angiotensin I‐converting enzyme study by surface‐enhanced Raman spectroscopy

Author

Boginskaya, Irina, primary, Nechaeva, Natalia, additional, Tikhomirova, Victoria, additional, Kryukova, Olga, additional, Evdokimov, Valery, additional, Bulaeva, Naida, additional, Golukhova, Elena, additional, Ryzhikov, Ilya, additional, Kost, Olga, additional, Afanasev, Konstantin, additional, Vereshchagin, Konstantin, additional, and Kurochkin, Ilya, additional

Published
2021
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7. Tunable metasurface composed of periodic metal-dielectric resonators

Author

Ivanov, Andrey V., primary, Sarychev, Andrey K., additional, Afanasev, Konstantin N., additional, Bykov, Igor V., additional, Boginskaya, Irina A., additional, Lagarkov, Andrey N., additional, Merzlikin, Alexander M., additional, Ryzhikov, Ilya A., additional, Sedova, Marina V., additional, Kurochkin, Ilya N., additional, Evtushenko, Evgeniy G., additional, Mikheev, Vitaliy V., additional, and Negrov, Dmitriy V., additional

Published
2018
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8. Poly(p-xylylene) Silver Nanocomposites: Optical, Radiative, and Structural Properties

Author

Afanasev, Konstantin N., primary, Boginskaya, Irina A., additional, Dorofeenko, Alexandr V., additional, Gysev, Alexey V., additional, Mailyan, Karen A., additional, Pebalk, Andrey V., additional, Chvalyn, Vladimir N., additional, Ozerin, Sergey A., additional, Sedova, Marina V., additional, Rodionov, Ilya A., additional, Pogosov, Walter V., additional, and Ryzhikov, Ilya A., additional

Published
2017
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