Au nanoparticle@silica@europium coordination polymer nanocomposites for enhanced fluorescence and more sensitive monitoring reactive oxygen species

One-pot one-step synthesis of Au@SiO2 core–shell nanoparticles and their shell-thickness-dependent fluorescent properties

“…Deviation from the optimum silica thickness resulted in a decrease enhancement factor, which is consistent very well with previous reports. [35][36][37] The SPR bonds of Au@SiO 2 core-shell NPs around 520 nm overlap well with the emission peak of FITC. The enhancement is attributed to the enhanced radiative decay rate, which causes increased uorescence quantum yield and shortened uorescence lifetime.…”

Recent progress in sensing application of metal nanoarchitecture-enhanced fluorescence

“…2,14,20 Thus MEF can solve the inherent shortcomings of fluorophores by improving both quantum efficiency and stability. 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]…”

“…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.…”

Multifunctional fibrous wound dressings for refractory wound healing

“…138,180 168 The diagnostic mechanism of this system was that S═O groups formed in the presence of H 2 O 2 and donated p-electrons to Eu 3+ , leading to the generation of electron transfer and further the change of coordination environment and fluorescence intensity of Eu 3+ (Figure 9C-F). 181,182 Bacterial diagnostic fibrous dressings based on chromogenic or fluorescent probes assess the wound infection status directly. However, they cannot treat the bacterial infections in time, which may delay the healing process.…”

“…The diagnostic mechanism of this system was that S═O groups formed in the presence of H 2 O 2 and donated p‐electrons to Eu 3+ , leading to the generation of electron transfer and further the change of coordination environment and fluorescence intensity of Eu 3+ (Figure 9C–F). 181,182 …”