Metal-enhanced fluorescence effect of Ag and Au nanoparticles modified with rhodamine derivative in detecting Hg2+

Plasmonic nanoparticles in chemical analysis

“…140 Both MEF sensors utilizing Ag or Au nanoparticles have high Hg 2+ selectivity in the presence of interfering ions and have low detection limits (the detection limits of Hg 2+ were determined as equal to 0.9 and 1.4 ppb for MEF sensors utilising Ag and Au nanoparticles, respectively). 140 Different MEF sensor for detection of mercury ions uses gold nanoparticles capped by luminal. 141 It was observed that uorescent intensity decreasing with increasing concentrations of Hg 2+ ions in a sample.…”

“…139 MEF may be also used for detection of cations of heavy metals. An example MEF sensor for cations of heavy metals has been constructed by Cheng et al 140 They used both silver and gold loaded mesoporous silica materials functionalized by rhodamine as a uorophore. The uorescence of rhodamine at 584 nm was greatly enhanced aer addition of Hg 2+ ions, while there was no effect of other competitive ionssee Fig.…”

Effect of Surface Plasmon Resonance in the Fluorometric Properties of Molecules and Complexes

“…Предложен нанокомпозит на основе мезопористого диоксида кремния (HMS), наночастиц серебра и родамина R в качестве хемосенсора для определения ионов Hg 2+ в водных растворах. Сопоставление химико-аналитических свойств нанокомпозитов на основе серебряных или золотых наночастиц позволило установить, что максимальное увеличение флуоресценции в присутствии солей ртути наблюдается в системе Ag -HMS -родамин R [33].…”

Exploration of grating-based surface plasmon resonance systems for wave vector matching to enhance plasmon modes and preliminary surface plasmon-enhanced fluorescence interrogation

“…58,63,113,116,[118][119][120][121][122] Enhanced emission due to SPCE is polarized because the radiative plasmon modes emitting the light are p-polarized. 58,113,116,122 Metal nanoparticles, 123,124 prisms with metal films 58,73 and nanostructured metal films 53,112,113,122,125,126 are typically used for MEF. Nanostructured films (referred to here as gratings) offer multiple, tunable diffractive modes dependent on the grating periodicity and angle/wavelength combination of incident light.…”

“…73,122 Examples of common polymers include PMMA, PDMS, and PVA. Common fluorophores used include the rhodamine family (RhB, Rh-G6, etc) 53,123 . Alternatives to fluorophores include quantum dots such as Alq3 84,113 or colloidal quantum dots.…”