Luminescence and photocatalytic studies of Sm³⁺ion doped SnO₂nanoparticles

Enhancement of Luminescence Intensity in Dy3+ Ions Doped YVO4 Nanomaterials by Ba2+ Ion Codoping and YVO4:2Dy/Fe3O4 Nanohybrid for Hyperthermia Application

“…There is strong energy transfer from host to dopant Dy 3+ ion (Scheme 1). The intensity of emission spectra increases with increase in annealing temperature also which is due to decreases of -OH/dangling bond present on the surface of the nanoparticles at higher annealing temperature [16].…”

Synthesis and photoluminescent properties of Sm3+-doped SnO2 nanoparticles

“…Consequently, oxygen vacancies cannot be excluded when accounting for the slight broadening of the Sm 3+ emission peaks, and they may indeed mediate the energy transfer from host to dopant, as claimed by Singh et al [16] for SnO2 and by Liu et al [5] for ZnO and TiO2. Singh and his co-workers [16] recently reported sensitized luminescence of Sm dopant in SnO2 nanoparticles; their sensitized emission spectra were broad and not well resolved, but those authors discovered important annealing consequences including the removal of quenching surface hydroxides, in contrast to earlier research [24].…”

“…Singh and his co-workers [16] recently reported sensitized luminescence of Sm dopant in SnO2 nanoparticles; their sensitized emission spectra were broad and not well resolved, but those authors discovered important annealing consequences including the removal of quenching surface hydroxides, in contrast to earlier research [24]. Furthermore, given the clear enhancement in photoluminescent efficiency in the spectra reported here, along with the observed crystal-field splittings not previously detected via direct excitation, a possible interpretation of the splitting and sharp emission is the highly crystalline surrounding environment of the Sm 3+ lattice sites within the ceramic nanocrystals [25].…”

“…Literature reports on the optical properties of SnO2 ceramic nanoparticles are relatively scarce. Studies of SnO2 doped with ions such as Er [11], Dy [12], Eu [13], Sb [14] and Mg [15] have been reported, but to the best of our knowledge, very few reports exist of host sensitization energy transfer studies involving SnO2 nanocrystals and Sm 3+ ions [16]. Sensitized emission from semiconductors has mainly been reported for TiO2 host structures [5], but in most cases the semiconductor was embedded in a partiallycrystalline or amorphous matrix, and the resulting reduction in site homogeneity and symmetry led to broadening of the emission peaks at room temperature.…”

Quartz Tuning Fork as Humidity Sensor

“…Using this environment [11][12][13][14][15][16], QTF is dropped into the solution. Humidity will act on the coated layer and corresponding shift in frequency occurs.…”