Stable in Biocompatible Buffers Silver Nanoisland Films for SERS
We investigated the stability of silver nanoisland films, which were formed on glass surface by the method of out-diffusion, in biocompatible buffers and the applicability of the films in surface enhanced Raman scattering (SERS). We have shown that silver nanoisland films are stable in one of the mo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Biosensors |
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| Online Access: | https://www.mdpi.com/2079-6374/11/11/448 |
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| author | Alexey Skvortsov Ekaterina Babich Alexey Redkov Andrey Lipovskii Valentina Zhurikhina |
| author_facet | Alexey Skvortsov Ekaterina Babich Alexey Redkov Andrey Lipovskii Valentina Zhurikhina |
| author_sort | Alexey Skvortsov |
| collection | DOAJ |
| description | We investigated the stability of silver nanoisland films, which were formed on glass surface by the method of out-diffusion, in biocompatible buffers and the applicability of the films in surface enhanced Raman scattering (SERS). We have shown that silver nanoisland films are stable in one of the most widespread in biological studies buffer—phosphate buffer saline (PBS), and in 1:100 water-diluted PBS, in the PBS-based buffer, in which NaCl is replaced by the same amount of NaClO<sub>4</sub>, and in acidic phosphate buffer. At the same time, the replacement of NaCl in PBS by N(CH<sub>3</sub>)<sub>4</sub>Cl leads to the degradation of the nanoislands. It was shown that after exposure to PBS the nanoisland films provided a good SERS signal from a monolayer of 1,2-di(4-pyridyl)ethylene (BPE), which makes silver nanoisland films promising for biosensor applications. Additionally, in our experiments, we registered for the first time that silver nanoparticles formed in the bulk of the samples dissolved after exposing to PBS, while nanoislands on the glass surface stayed unchanged. We associate this phenomenon with the interaction of ions contained in PBS solution with silver, which results in the shift of corresponding chemical equilibrium. |
| first_indexed | 2024-03-10T05:40:38Z |
| format | Article |
| id | doaj.art-c78aaa2e933e4704aa419228296dcd78 |
| institution | Directory Open Access Journal |
| issn | 2079-6374 |
| language | English |
| last_indexed | 2024-03-10T05:40:38Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biosensors |
| spelling | doaj.art-c78aaa2e933e4704aa419228296dcd782023-11-22T22:36:19ZengMDPI AGBiosensors2079-63742021-11-01111144810.3390/bios11110448Stable in Biocompatible Buffers Silver Nanoisland Films for SERSAlexey Skvortsov0Ekaterina Babich1Alexey Redkov2Andrey Lipovskii3Valentina Zhurikhina4Institute 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 Problems of Mechanical Engineering, Bolshoy pr. V. O. 61, 199178 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, RussiaWe investigated the stability of silver nanoisland films, which were formed on glass surface by the method of out-diffusion, in biocompatible buffers and the applicability of the films in surface enhanced Raman scattering (SERS). We have shown that silver nanoisland films are stable in one of the most widespread in biological studies buffer—phosphate buffer saline (PBS), and in 1:100 water-diluted PBS, in the PBS-based buffer, in which NaCl is replaced by the same amount of NaClO<sub>4</sub>, and in acidic phosphate buffer. At the same time, the replacement of NaCl in PBS by N(CH<sub>3</sub>)<sub>4</sub>Cl leads to the degradation of the nanoislands. It was shown that after exposure to PBS the nanoisland films provided a good SERS signal from a monolayer of 1,2-di(4-pyridyl)ethylene (BPE), which makes silver nanoisland films promising for biosensor applications. Additionally, in our experiments, we registered for the first time that silver nanoparticles formed in the bulk of the samples dissolved after exposing to PBS, while nanoislands on the glass surface stayed unchanged. We associate this phenomenon with the interaction of ions contained in PBS solution with silver, which results in the shift of corresponding chemical equilibrium.https://www.mdpi.com/2079-6374/11/11/448ion-exchangesilver nanoparticlesstabilityluminescenceRamanSERS |
| spellingShingle | Alexey Skvortsov Ekaterina Babich Alexey Redkov Andrey Lipovskii Valentina Zhurikhina Stable in Biocompatible Buffers Silver Nanoisland Films for SERS Biosensors ion-exchange silver nanoparticles stability luminescence Raman SERS |
| title | Stable in Biocompatible Buffers Silver Nanoisland Films for SERS |
| title_full | Stable in Biocompatible Buffers Silver Nanoisland Films for SERS |
| title_fullStr | Stable in Biocompatible Buffers Silver Nanoisland Films for SERS |
| title_full_unstemmed | Stable in Biocompatible Buffers Silver Nanoisland Films for SERS |
| title_short | Stable in Biocompatible Buffers Silver Nanoisland Films for SERS |
| title_sort | stable in biocompatible buffers silver nanoisland films for sers |
| topic | ion-exchange silver nanoparticles stability luminescence Raman SERS |
| url | https://www.mdpi.com/2079-6374/11/11/448 |
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