Efficient upconversion fluorescence in NaYF4:Yb3+, Er3+/mNaYF4 multilayer core-shell nanoparticles

Improvement in Luminescence Intensity of β-NaYF4: 18%Yb3+, 2%Er3+@β-NaYF4 Nanoparticles as a Result of Synthesis in the Presence of Stearic Acid

“…Based on the luminescence decays measured for the three main transitions ( 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 , 4 F 9/2 → 4 I 15/2 ), the luminescence lifetimes were calculated and collected in Figure 6a. The obtained samples exhibited relatively long emission decays [37]. NPs received without SA showed the shortest decays, which means they are not as well protected from solvent molecules as NPs with SA on their surface.…”

Magnetically Separable Fe3O4@Au@Tb‐MOF Fluorescent Probe with Well‐Designed Sandwich Structure and Metal‐Enhanced Fluorescence

“…Specifically, under the excitation of light field, the surface of metal nanoparticles will generate plasma, which will cause surface plasmon resonance, thereby enhancing the local electromagnetic field around the metal nanoparticles and leading to a significant increase in quantum yield. [8] Recently, MEF-based methods are applied to the fluorescent materials including organic fluorophores, [9] and small nanoparticles (e. g. quantum dots, [10] carbon dots, [11] and upconversion nanoparticles [12] ) to improve the sensitivity of fluorescence detection because of highly effective in enhancing the fluorescence intensity.…”

Utilizing modules of different functions to construct a Janus-type membrane and derivative 3D Janus-type tube displaying synchronous trifunction of conductive aeolotropism, magnetism and luminescence

“…Partition includes microscopic partition and macroscopic partition. The core-shell structure [15][16][17] is a typical microscopic partition structure design that can achieve separation of different substances and reduce negative interference [18,19]. The Janus-type nanoribbon [20][21][22] is an ideal nanoscaled microscopic building unit to gain microscopic partition.…”