Exploring the variability of methylene blue´s surface-enhanced Raman scattering spectra – Impact of the experimental conditions (Plasmonic metal and excitation wavelength) and ongoing reactions (Reduction and photon-induced demethylation)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F25%3A00617462" target="_blank" >RIV/61388963:_____/25:00617462 - isvavai.cz</a>
Alternative codes found
RIV/67985882:_____/25:00617462 RIV/60461373:22340/25:43930423
Result on the web
<a href="https://doi.org/10.1016/j.colsurfa.2025.136187" target="_blank" >https://doi.org/10.1016/j.colsurfa.2025.136187</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.colsurfa.2025.136187" target="_blank" >10.1016/j.colsurfa.2025.136187</a>
Alternative languages
Result language
angličtina
Original language name
Exploring the variability of methylene blue´s surface-enhanced Raman scattering spectra – Impact of the experimental conditions (Plasmonic metal and excitation wavelength) and ongoing reactions (Reduction and photon-induced demethylation)
Original language description
This study investigates the behavior and transformations of methylene blue (MB) on various SERS-enhancing substrates (Au, Cu, and their composites) using four excitation wavelengths (532, 633, 785, and 1064 nm). The SERS spectra strongly depend on both the excitation wavelength and substrate. While the 532-nm excitation mainly induces electromagnetic enhancement, leading to similar SERS spectra across all substrates, chemical effects significantly influence spectra obtained with other wavelengths, producing substrate-specific responses. Due to MB's absorption band, photochemical transformations are likely with visible excitations. DFT analysis confirmed these reactions, identifying that one or two methyl groups are typically removed during MB demethylation. These findings are important for understanding SERS chemical enhancement and photochemical reactions, with potential implications for analytical applications. Monitoring reactions on plasmonic nanostructures is essential for ensuring reliable SERS results, considering analyte stability and enhancement mechanisms. Unlike studies using simple model probes, this work demonstrates the methodology's application potential with a more complex substance
Czech name
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Czech description
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Classification
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
10406 - Analytical chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Colloids and Surfaces A-Physicochemical and Engineering Aspects
ISSN
0927-7757
e-ISSN
1873-4359
Volume of the periodical
709
Issue of the periodical within the volume
part 2
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
14
Pages from-to
136187
UT code for WoS article
001403609100001
EID of the result in the Scopus database
2-s2.0-85215134822