Atmospheric oxidation and carbon contamination of silver and its effect on surface-enhanced Raman spectroscopy (SERS)
| Autor: | Jyrki Lappalainen, Santtu Heinilehto, Tarmo Nuutinen, Pasi Vahimaa, Jussi Hiltunen, Tommi Itkonen, Antti Matikainen, Jarkko Puustinen, Pentti Karioja |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Multidisciplinary
Materials science Carbon contamination optical sensors ta213 Analytical chemistry Nanoparticle 02 engineering and technology Repeatability Surface-enhanced Raman spectroscopy Contamination 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences symbols.namesake 13. Climate action Elemental analysis symbols nanoparticles 0210 nano-technology Atmospheric contamination Raman spectroscopy |
| Zdroj: | Scientific Reports Matikainen, A, Nuutinen, T, Itkonen, T, Heinilehto, S, Puustinen, J, Hiltunen, J, Lappalainen, J, Karioja, P & Vahimaa, P 2016, ' Atmospheric oxidation and carbon contamination of silver and its effect on surface-enhanced Raman spectroscopy (SERS) ', Scientific Reports, vol. 6, 37192 . https://doi.org/10.1038/srep37192 |
| ISSN: | 2045-2322 |
| Popis: | Surface-enhanced Raman spectroscopy (SERS) is considered a highly promising technology for different analytical purposes. The applications of SERS are still quite limited due its relatively poor quantitative repeatability and the fact that SERS is very sensitive to oxidation, which is a challenge especially with silver based SERS substrates. Here, the link between these phenomena is investigated by exposing silver SERS substrates to ambient laboratory air. We show that SERS intensity decreases exponentially after the exposure, which consequently leads to an increasing standard deviation (σ) in intensity. Within a five-hour measurement window, the SERS intensity already drops by 60%, while σ triples from 7% to 21%. The SERS results are supplemented by elemental analysis, which shows that oxidation and atmospheric carbon contamination coincide with the rapid SERS intensity decrease. The results emphasize how sensitive SERS is towards atmospheric contamination and how it can also reduce the measurement repeatability – even if the substrates are exposed to air just for a very short period of time. |
| Databáze: | OpenAIRE |
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