All-inorganic CsPbX3 (X=I, Br, Cl) perovskite quantum dots (PQDs) have been investigated because of their optical properties, such as tunable wavelength, narrow band, and high efficiency. These features used in light emitting diode (LED) devices. LED on-chip fabrication uses mixed green red with silicone gel. However, the ion-exchange effect widens emission spectrum. Quantum cannot be anion exchange. We address this issue a mesoporous PQD nanocomposite that can prevent ion exchange increase...

Graphical representation of Li⁺ co-doped Y₂Ti₂O₇:Er³⁺/Yb³⁺ phosphor showing up-conversion green and red bands probing the fluorescence intensity ratio (FIR) for temperature sensing applications.

Sm³⁺(Sm³⁺= 2, 5, 7 and 10 at%) doped CaWO₄nanophosphors exhibit a wide range emission in blue, green red regions of the visible spectrum.

We have studied the luminescence property of CaMoO4:Eu3+. The emission peaks at 590 (5D0→7F1) and 613 nm (5D0→7F2) for Eu3+ are observed after excitation 266 (i.e. Mo–O charge transfer band). peak intensity latter dominates over former indicating an asymmetric environment in EuO8 polyhedron or parity mixing. Luminescence increases significantly with co-doping Gd3+. This is ascribed to energy from Mo–O/Gd3+ Eu3+. annealing up 900 °C due extent decrease non-radiative rates. Very high values...

Y2Ti2O7 (YTO) and Er3+/Yb3+ co-doped (EYYTO) phosphors have been prepared by solid-state reaction method. Structures of YTO EYYTO are identified as face centered cubic pyrochlores. Up-conversion emission spectra under 976 nm excitation is studied, which revealed three prominent lines at ∼524, 548 661 originating from 2H11/2 → 4I15/2, 4S3/2 4I15/2 4F9/2 electronic transitions Er3+ ion, respectively in green red regions. The power dependence study suggests that these bands arise due to two...

Nanocrystals having single-band red emission under near-infrared (NIR) excitation through the upconversion process offer great advantages in terms of enhanced cellular imaging vitro and vivo experiments biological window (600–900 nm), as a security ink, photothermal therapy (PTT), photodynamic (PDT), so forth but are challenging for materials scientists. In this work, we report first time preparation super bright emitter at 655 nm from monodispersed NaErF4:0.5%Tm@NaYF4:20%Yb nanocrystals...

Cancer is among the leading causes of mortality and morbidity in world. Metallic nanoparticles, especially gold nanoparticles (AuNPs) have emerged to be attractive systems circumvent associated adverse effects. By virtue their unique properties tunable size, shape, composition, optical properties, biocompatibility, minimal toxicity, multivalency, fluorescence-luminescence property surface plasmon resonance; AuNPs potential used as drug delivery systems. It vital ensure that reaches target...

Magnetic-field-dependent magnetization of highly crystalline Fe 3 O 4 magnetic nanoparticles are carried out to understand surface canting structures.

A facile auto-combustion route is used for the synthesis of Gd(3+) (2, 5, 7 and 10 at%) co-doped CaMoO4:Eu nanoparticles. X-ray diffraction study suggests that as-prepared samples have extra impurity phases in addition to main tetragonal phase CaMoO4, such decrease as annealing temperature increases from 600 900 °C. The crystal structure has been analysed using Rietveld program. It space group I4₁/a (88) Z = 4 (number CaMoO4 formula units per unit cell). Average crystallite sizes...

Abstract All‐inorganic CsPbX 3 (X=I, Br, Cl) perovskite quantum dots (PQDs) have been investigated because of their optical properties, such as tunable wavelength, narrow band, and high efficiency. These features used in light emitting diode (LED) devices. LED on‐chip fabrication uses mixed green red with silicone gel. However, the ion‐exchange effect widens emission spectrum. Quantum cannot be anion exchange. We address this issue a mesoporous PQD nanocomposite that can prevent ion exchange...

Highly water dispersible Eu³⁺ doped CaMoO₄ nanoparticles (core) covered by (shell) have been prepared using the polyol method. Significant enhancement in luminescence intensity core@shell formation is observed due to decrease of non-radiative rate arising from surface/defect particles. Effect 266 nm laser excitation (Mo-O charge transfer band) on asymmetric ratio (A₂₁ = electric magnetic dipole transitions) has studied and compared with a xenon lamp source. Luminescence increases increase...

Eu3+ (2, 5, 7 and 10 at.%) activated SrWO4 phosphors were prepared via a polyol synthesis route at low temperature (∼150 °C) under urea hydrolysis. X-ray diffraction studies of all doped samples corroborate good crystallinity with tetragonal scheelite-type structure the phase. The value strain was obtained in range ∼0.003 to 0.004 for as-prepared (ASP) annealed 900 °C. Vibrational modes studied using IR Raman Spectroscopy. Photoluminescence carried out 266, 394 464 nm excitations. An intense...

Electrolyzed Oxidized Water (EOW) is produced by passing a diluted salt solution through an electrolytic cell, having anode and cathode electrodes. The are separated bipolar membrane. Negatively charged ions—chloride hydroxide in the move to give up electrons become gas (O2, Cl2) hypochlorous acid redox potential of +700 +800 mV with pH 4.0. It has strong oxidation shortage giving it ability oxidize sterilize. In microbial inactivation process, oxidized water damage cell membranes, create...

Zn²⁺ (0, 2, 5, 7 and 10 at%) co-doped CaMoO₄:2Eu³⁺ nanophosphors have been synthesized <italic>via</italic> the polyol method using ethylene glycol (EG) as both capping agent reaction medium at 150 °C.

Monodispersed upconversion nanoparticles NaYF4:Er3+/Yb3+ (UCNPs) have been synthesized via the thermolysis method. Förster or fluorescence resonance energy transfer (FRET) dynamics from to gold (AuNPs) are well understood. However, only FRET-based heating (negligible fluorophore gold) is not much known so far in such systems under near-infrared (NIR) photon excitation. NIR-to-visible (UC) has already proven its utility bioassays. Ultrasensitive FRET responsible surface plasmon (SPR) induced...

In this work, we report a polyol route for easy synthesis of upconversion (UC) phosphor nanoparticles, YVO4:Ho3+-Yb3+-K+, which enables large-scale production and enhancement luminescence. Upon 980 nm laser excitation, the UC emission spectrum shows sharp bright peak at ∼650 Ho3+ ion; luminescence intensity increases twofold upon K+ codoping. 300 downconversion broad in 400–500 range (related to charge transfer band V–O) along with peaks. addition, polyethylene glycol-coated nanoparticles...

Schematic representation of the generation warm-white light<italic>via</italic>a red perovskite quantum dot (R-PQD) assisted YAG:Ce phosphor blend on a blue chip.

In the present work, we describe synthesis of (Ca0.99–xHo0.01Ybx)TiO3 (x = 0.05, 0.10, and 0.15) perovskite nanoparticles with a cubic structure by using sol–gel method. As-synthesized particles have been found to be spherical in shape, as analyzed transmission electron microscopy scanning microscopy. Fourier transform infrared spectra product consist distinct featured vibrational modes Ti–O. Upconversion well power-dependent (500–4000 mW) investigated at 980 nm excitation. It exhibits...