Silver nanoparticles enhanced fluorescence for sensitive determination of fluoroquinolones in water solutions

Abstract

A new type of silver nanoparticle (AgNPs) was prepared with simple and fast methods and low-toxic compounds. With the addition of different concentrations of AgNPs, the effects of AgNPs on the fluorescence properties of three different kinds of fluoroquinolones (enrofloxacin ENR, lomefloxacin LMF and norfloxacin NOR) in water solutions were studied, respectively. The experimental results demonstrated that the fluorescence intensity for each of the fluoroquinolones (FQ)was firstly enhanced and then quenched with the increased concentration of AgNPs in water solutions. The possible mechanisms about the AgNPs on the fluorescence behaviors of each FQ were also investigated, respectively. In addition, new silver enhanced nanoparticles materials fluorescence methods were established for the separate determination of ENR, LMF and NOR in water solutions. As compared with the identical control fluorimetric methods with no addition of AgNPs, the new enhanced fluorimetic methods were also investigated, respectively. The experimental results indicated that the new enhanced methods could detect lower concentrations of ENR, LMF and NOR in water solutions. Moreover, the newly enhanced fluorimetric methods were validated and successfully applied for the quantitative assay of ENR, LMF and NOR in different kinds of medicinal preparations, respectively.

Green Synthesis and Characterization of Novel Silver Nanoparticles Using Achillea maritima subsp. maritima Aqueous Extract: Antioxidant and Antidiabetic Potential and Effect on Virulence Mechanisms of Bacterial and Fungal Pathogens

“…Fluorescence data obtained via FFFS can be converted into knowledge about the physical characteristics of nanoparticles using mathematical models and statistical analysis. These techniques have been widely exploited to characterize nanoparticles for use in numerous research applications [ 62 , 63 , 64 ].…”

Recent progress in sensing application of metal nanoarchitecture-enhanced fluorescence

“…So far, LSP has been used to enhance emission of dyes 17,19,21,22 , rare earth, [23][24][25][26][27][28] quantum dots (QDs), 14,[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] carbon dots, 36,38 carbon nanotubes, 44 gold nanoclusters 45,46 and even upconversion fluorophores. 33,47,48 And these enhanced fluorescence has already been extensively applicated in environmental analysis, 45,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]…”

“…To produce the integrated core/shell or sandwich plasmonic nanostructure, commonly the following three processes should be considered: preparation of the metallic nanostructure, coating of the spacer layer and immobilization of the fluorophore layer. 27,[59][60][61][62][63][64]147 MEF from various geometrical nanostructures have been studied and reported so far, and they can be categorized into two main groups: solution-based colloidal nanoparticles (NPs) 27,31,48,52,54,92,145,150 and periodical/non-periodical plasmonic substrate chip, 45,51,64,74,108,135,151, 152 see Fig. 2.…”