Modulated Luminescence of Lanthanide Materials by Local Surface Plasmon Resonance Effect

Abstract

Lanthanide materials have great applications in optical communication, biological fluorescence imaging, laser, and so on, due to their narrow emission bandwidths, large Stokes’ shifts, long emission lifetimes, and excellent photo-stability. However, the photon absorption cross-section of lanthanide ions is generally small, and the luminescence efficiency is relatively low. The effective improvement of the lanthanide-doped materials has been a challenge in the implementation of many applications. The local surface plasmon resonance (LSPR) effect of plasmonic nanoparticles (NPs) can improve the luminescence in different aspects: excitation enhancement induced by enhanced local field, emission enhancement induced by increased radiative decay, and quenching induced by increased non-radiative decay. In addition, plasmonic NPs can also regulate the energy transfer between two close lanthanide ions. In this review, the properties of the nanocomposite systems of lanthanide material and plasmonic NPs are presented, respectively. The mechanism of lanthanide materials regulated by plasmonic NPs and the scientific and technological discoveries of the luminescence technology are elaborated. Due to the large gap between the reported enhancement and the theoretical enhancement, some new strategies applied in lanthanide materials and related development in the plasmonic enhancing luminescence are presented.

Enhanced up-conversion photoluminescence in fluoride–oxyfluoride nanophosphor films by embedding gold nanoparticles

“…2e), which is associated to an increase in the radiative decay rate of Er 3+ . 14,41,45 The enhancement gradually reduces with gold content. As a matter of fact, the presence of gold NPs brings about absorption losses and introduces non-radiative decay channels that are detrimental for the UCPL, as previously reported for NaYF 4 :Yb,Er NPs decorated with Ag NPs.…”

“…2b), which enables energy transfer between the nanophosphors and the plasmonic particles. 41,42 However, this transfer depends strongly on the average distance between luminescent centers and metallic NPs, 18,29,43,44 which is affected by the concentration of gold NPs in the film. The intensity of UCPL depends on two distinct processes: (i) the feeding of Er 3+ levels, and (ii) the relaxation to the ground state, which can be radiative and nonradiative.…”

Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs

“…Conversely, downshifting luminescence occurs [19,20]. In addition, the lanthanide luminescence is closely related to the chemical environment in which the luminescent center is located, as such the surrounding high-energy O−H, N−H, and C−H vibrations will affect the luminescence intensity [21][22][23]. Based on this phenomenon, it is possible to design and synthesize optical sensors for small molecule species (e.g., water).…”

Rapid Monitoring of Vancomycin Concentration in Serum Using Europium (III) Chelate Nanoparticle-Based Lateral Flow Immunoassay

“…The application of lanthanide-doped polystyrene nanomaterials can remedy the defects of conventional fluorescent dyes, which include photobleaching, poor stability, or poor quantum yield, and the advantages of simplicity and rapidity can be retained (Tang et al, 2017). Furthermore, lanthanide chelates are appropriate as immunoassay markers for trace analysis with the advantages of long fluorescence decay time, large Stoke shift between excitation light and emission light, narrow excited fluorescence band, sharp fluorescence emission, and excellent photo-stability, all of which lead to outstanding analysis sensitivity and accuracy (Liu et al, 2021). In this study, we constructed an LFIA method to detect VAN.…”