Steel Wire Mesh as a Thermally Resistant SERS Substrate
Autor: | Zuzanna Majka, Evelin Witkowska, Agnieszka Kamińska, Katarzyna Winkler, Krzysztof Niciński, Tomiła Deskur, Tomasz Krehlik, Tomasz Szymborski |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
SERS platform
Analyte blood-plasma spectroscopy Materials science steel mesh General Chemical Engineering polymer mat 02 engineering and technology dna wire mesh 010402 general chemistry 01 natural sciences Article lcsh:Chemistry symbols.namesake Adsorption bacillus subtilis surface General Materials Science silver Surface-enhanced Raman spectroscopy (SERS) Spectroscopy bacteria Bacillus subtilis business.industry fungi Escherichia coli Substrate (chemistry) ceramic filters 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:QD1-999 enhanced raman-scattering symbols Degradation (geology) Optoelectronics identification escherichia coli 0210 nano-technology business Raman spectroscopy Selectivity Layer (electronics) |
Zdroj: | Nanomaterials Volume 8 Issue 9 Nanomaterials, Vol 8, Iss 9, p 663 (2018) |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano8090663 |
Popis: | In this paper, we present novel type of Surface-enhanced Raman spectroscopy (SERS) platform, based on stainless steel wire mesh (SSWM) covered with thin silver layer. The stainless steel wire mesh, typically used in chemical engineering industry, is a cheap and versatile substrate for SERS platforms. SSWM consists of multiple steel wires with diameter of tens of micrometers, which gives periodical structure and high stiffness. Moreover, stainless steel provides great resistance towards organic and inorganic solvents and provides excellent heat dissipation. It is worth mentioning that continuous irradiation of the laser beam over the SERS substrate can be a source of significant increase in the local temperature of metallic nanostructures, which can lead to thermal degradation or fragmentation of the adsorbed analyte. Decomposition or fragmentation of the analysed sample usually causea a significant decrease in the intensity of recorded SERS bands, which either leads to false SERS responses or enables the analysis of spectral data. To our knowledge, we have developed for the first time the thermally resistant SERS platform. This type of SERS substrate, termed Ag/SSWM, exhibit high sensitivity (Enhancement Factor (EF) = 106) and reproducibility (Relative Standard Deviation (RSD) of 6.4%) towards detection of p-mercaptobenzoic acid (p-MBA). Besides, Ag/SSWM allows the specific detection and differentiation between Gram-positive and Gram-negative bacterial species: Escherichia coli and Bacillus subtilis in label-free and reproducible manner. The unique properties of designed substrate overcome the limitations associated with photo- and thermal degradation of sensitive bacterial samples. Thus, a distinctive SERS analysis of all kinds of chemical and biological samples at high sensitivity and selectivity can be performed on the developed SERS-active substrate. |
Databáze: | OpenAIRE |
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