Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film
We studied the surface-enhanced Raman spectra of amino acids <i>D</i>-alanine and <i>DL</i>-serine and their mixture on silver nanoisland films (SNF) immersed in phosphate-buffered saline (PBS) solution at millimolar amino acid concentrations. It is shown that the spectra fro...
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MDPI AG
2022-07-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/14/5455 |
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| author | Alexey Skvortsov Ekaterina Babich Andrey Lipovskii Alexey Redkov Guang Yang Valentina Zhurikhina |
| author_facet | Alexey Skvortsov Ekaterina Babich Andrey Lipovskii Alexey Redkov Guang Yang Valentina Zhurikhina |
| author_sort | Alexey Skvortsov |
| collection | DOAJ |
| description | We studied the surface-enhanced Raman spectra of amino acids <i>D</i>-alanine and <i>DL</i>-serine and their mixture on silver nanoisland films (SNF) immersed in phosphate-buffered saline (PBS) solution at millimolar amino acid concentrations. It is shown that the spectra from the amino acid solutions differ from the reference spectra for microcrystallites due to the electrostatic orientation of amino acid zwitterions by the metal nanoisland film. Moreover, non-additive peaks are observed in the spectrum of the mixture of amino acids adsorbed on SNF, which means that intermolecular interactions between adsorbed amino acids are very significant. The results indicate the need for a thorough analysis of the Raman spectra from amino acid solutions, particularly, in PBS, in the presence of a nanostructured silver surface, and may also be of interest for studying molecular properties and intermolecular interactions. |
| first_indexed | 2024-03-09T10:12:54Z |
| format | Article |
| id | doaj.art-d59a3b18e44e4a3d838e4ae9c397e5f8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T10:12:54Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-d59a3b18e44e4a3d838e4ae9c397e5f82023-12-01T22:41:11ZengMDPI AGSensors1424-82202022-07-012214545510.3390/s22145455Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland FilmAlexey Skvortsov0Ekaterina Babich1Andrey Lipovskii2Alexey Redkov3Guang Yang4Valentina Zhurikhina5Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, RussiaInstitute of Physics and Mechanics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, RussiaInstitute of Physics and Mechanics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, RussiaInstitute for Problems in Mechanical Engineering of the Russian Academy of Sciences, Boljshoy Prospekt V.O. 61, 199178 St. Petersburg, RussiaSchool of Materials Science and Engineering, Shanghai University, Shangda Rd. 99, Baoshan, Shanghai 200444, ChinaInstitute of Physics and Mechanics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, RussiaWe studied the surface-enhanced Raman spectra of amino acids <i>D</i>-alanine and <i>DL</i>-serine and their mixture on silver nanoisland films (SNF) immersed in phosphate-buffered saline (PBS) solution at millimolar amino acid concentrations. It is shown that the spectra from the amino acid solutions differ from the reference spectra for microcrystallites due to the electrostatic orientation of amino acid zwitterions by the metal nanoisland film. Moreover, non-additive peaks are observed in the spectrum of the mixture of amino acids adsorbed on SNF, which means that intermolecular interactions between adsorbed amino acids are very significant. The results indicate the need for a thorough analysis of the Raman spectra from amino acid solutions, particularly, in PBS, in the presence of a nanostructured silver surface, and may also be of interest for studying molecular properties and intermolecular interactions.https://www.mdpi.com/1424-8220/22/14/5455SERSmetal surfacesamino acids |
| spellingShingle | Alexey Skvortsov Ekaterina Babich Andrey Lipovskii Alexey Redkov Guang Yang Valentina Zhurikhina Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film Sensors SERS metal surfaces amino acids |
| title | Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film |
| title_full | Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film |
| title_fullStr | Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film |
| title_full_unstemmed | Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film |
| title_short | Raman Scattering Study of Amino Acids Adsorbed on a Silver Nanoisland Film |
| title_sort | raman scattering study of amino acids adsorbed on a silver nanoisland film |
| topic | SERS metal surfaces amino acids |
| url | https://www.mdpi.com/1424-8220/22/14/5455 |
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