Beyond common analytical limits of radicals detection using the functional SERS substrates

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43919574" target="_blank" >RIV/60461373:22310/19:43919574 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925400519312146?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925400519312146?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.snb.2019.127015" target="_blank" >10.1016/j.snb.2019.127015</a>

Result language
angličtina
Original language name
Beyond common analytical limits of radicals detection using the functional SERS substrates
Original language description
In this work, we present the novel analytical procedure for the detection of the radicals in the analytical solutions with an unprecedented detection limit and versatility. The proposed procedure is based on the grafting of stable 2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO) radical to the surface of the SERS-active gold grating. The presence of radicals in the analytical solution induces the conversion of grafted TEMPO to N-oxoammonium salt accompanied by the appropriate peak shifts in SERS spectra. Observed changes of SERS spectra makes possible to detect the presence of radicals down to 10−10 M concentration, far exceeding the sensitivity of common analytical methods. Proposed highly regular plasmonic background providing homogeneous distribution of electric field enhancement together with used surface decoration procedure ensuring uniform distribution of grafted TEMPO molecules, result in perfect SERS results reproducibility. Finally, the regeneration of SERS substrate was also demonstrated which is essential for repeated use of created SERS chips in radical's detection.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/GA18-26170S" target="_blank" >GA18-26170S: Light triggerable p-conjugated polymers for ON/OFF reversible conductivity switching</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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