Copper-based multiwavelength UV surface enhanced Raman spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00635734" target="_blank" >RIV/68378271:_____/25:00635734 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/adom.202500078" target="_blank" >https://doi.org/10.1002/adom.202500078</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adom.202500078" target="_blank" >10.1002/adom.202500078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Copper-based multiwavelength UV surface enhanced Raman spectroscopy

Popis výsledku v původním jazyce

Herein, it is demonstrated that copper (Cu) nanoparticle-based surfaces prepared via a wet-chemical method exhibit considerable enhancement of the Raman signal for a monolayer of adenine, guanine, riboflavin, 4-mercaptobenzoic acid, and potassium thiocyanate analytes upon excitation with a laser in the wavelength range of 229–325 nm. The results reveal a notable enhancement of the Raman signal in the surface-enhanced Raman scattering (SERS) spectra of the analytes in the deep UV(ultraviolet) spectral ranges, a phenomenon previously unreported for Cu-based surfaces, which, according to current knowledge, typically exhibit enhancement only in the red and near-infrared spectral regions. Several analytes of different chemical natures are tested, which allow to test the hypothesis that π-conjugated molecules localized on the copper surface are more likely to contribute to the chemical enhancement of Raman signal. This enhancement arises from their capacity for charge delocalization, effective orbital alignment with the metal and resonance with electronic transitions in the UV spectral region. Based on these findings, the chemical enhancement mechanism related to charge transfer is the most plausible explanation for the observed enhancement in the UV-SERS signals of the investigated molecules on Cu surfaces.

Název v anglickém jazyce

Copper-based multiwavelength UV surface enhanced Raman spectroscopy

Popis výsledku anglicky

Herein, it is demonstrated that copper (Cu) nanoparticle-based surfaces prepared via a wet-chemical method exhibit considerable enhancement of the Raman signal for a monolayer of adenine, guanine, riboflavin, 4-mercaptobenzoic acid, and potassium thiocyanate analytes upon excitation with a laser in the wavelength range of 229–325 nm. The results reveal a notable enhancement of the Raman signal in the surface-enhanced Raman scattering (SERS) spectra of the analytes in the deep UV(ultraviolet) spectral ranges, a phenomenon previously unreported for Cu-based surfaces, which, according to current knowledge, typically exhibit enhancement only in the red and near-infrared spectral regions. Several analytes of different chemical natures are tested, which allow to test the hypothesis that π-conjugated molecules localized on the copper surface are more likely to contribute to the chemical enhancement of Raman signal. This enhancement arises from their capacity for charge delocalization, effective orbital alignment with the metal and resonance with electronic transitions in the UV spectral region. Based on these findings, the chemical enhancement mechanism related to charge transfer is the most plausible explanation for the observed enhancement in the UV-SERS signals of the investigated molecules on Cu surfaces.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/EH22_008%2F0004596" target="_blank" >EH22_008/0004596: Senzory a detektory pro informační společnost budoucnosti</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Optical Materials

ISSN

2195-1071

e-ISSN

2195-1071

Svazek periodika

13

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

2500078

Kód UT WoS článku

001464699100001

EID výsledku v databázi Scopus

2-s2.0-105002434606