Potential-Modulated Surface-Enhanced Raman Spectroscopy of Tolmetin at Gold Nanoparticle Film Functionalized Polarizable Liquid-Liquid Interfaces

被引：2

作者：

Tarabet, Madjid ^{[1
]}

Munoz, Nataly Rey ^{[2
,3
]}

Scanlon, Micheal D. ^{[2
,3
]}

Herzog, Gregoire ^{[1
]}

Dossot, Manuel ^{[1
]}

机构：

[1] Univ Lorraine, CNRS, LCPME, F-54000 Nancy, France

[2] Univ Limerick UL, Bernal Inst, Sch Nat Sci, Limerick V94 T9PX, Ireland

[3] Univ Limerick UL, Sch Nat Sci, Dept Chem Sci, Limerick V94 T9PX, Ireland

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2024年 / 128卷 / 19期

基金：

欧洲研究理事会;

关键词：

PLASMONIC NANOPARTICLES; SERS; SCATTERING; ARRAYS;

D O I：

10.1021/acs.jpcc.4c00937

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An aqueous colloidal suspension of gold nanoparticles (AuNPs) may be condensed into a thin fractal film at the polarizable liquid-liquid interface formed between two immiscible electrolyte solutions upon injection of millimolar concentrations of sodium chloride to the aqueous phase. By adjusting the interfacial polarization conditions (negative, intermediate, and positive open-circuit potentials), the morphology of the film is modified, resulting in unique surface plasmon properties of the film, which enable in situ surface-enhanced Raman spectroscopy (SERS). Intense SERS signals are observed at the polarizable liquid-liquid interface when micromolar concentrations of tolmetin, a nonsteroidal anti-inflammatory drug, are entrapped in the AuNP fractal film. The change in the signal intensity, averaged over multiple spectra, with respect to the concentration of tolmetin, depends on the polarization conditions and suggests the presence of chemical-induced damping effects on the surface plasmons of the gold film.

引用

页码：7936 / 7947

页数：12

共 55 条

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