Effect of silver NPs plasmon on optical properties of fluorescein dye

Surface morphology and optical properties of porphyrin/Au and Au/porphyrin/Au systems

“…The phenomenon cannot be explained by only the presence of Au and TPP components. Similar phenomena, i.e., a luminescence increase, were reported earlier for a mixture of dyes with colloid metal nanoparticles [30]. In this case, the luminescence intensity increased twice.…”

The interaction of fluorescent Pyronin Y molecules with monodisperse silver nanoparticles in chloroform

“…It is not easy that two phenomenon are mostly recognized. Dye aggregation processes and their spectroscopic characterizations have been reported for many dyes in the presence of some additives such as polyelectrolytes [23], polymer [14] and colloidal particles [5,6,22] as well as clay particles [6,13,15]. The absorption spectrum of PyY (1.0x10 -5 M) in chloroform had two absorption bands appeared at 553 nm (monomer) and at 540 nm (H-dimer) (Figure 2).…”

“…Numerous studies on the analyses of dye molecules-Ag NPs interactions via UV-Vis absorption spectroscopy have been reported [5,22]. The effect of Ag NPs on absorption behaviors of PyY in chloroform containing Ag NPs (0.927 mM) were investigated at various dye concentration in the range of 1.0x10 -6 -3.0x10 -5 M via UV-Vis absorption spectroscopy.…”

“…Additionally, the absorption of PyY in the range of 450 nm to 520 nm was enhanced by increasing Ag NPs concentration, which was higher order aggregates (H-aggregates). Consequently, the interaction of PyY with Ag NPs in chloroform caused to decreasing the aggregation and spectral shifting of the dye [6,22,25].…”

Spectroscopic laser parameters of Ag/CdTe nanostructure

“…The shape and size of the prepared nanoparticles were determined by transmission electron microscope in our previous published work. [19] …”