Synthesis and photoluminescence of core–shell structured spherical SiO2@YPO4:Tb3+ phosphors via sol–gel process

Li, Guangzhi; Liu, Songyan; Chu, Zhensheng; Gao, Hongfu; Wu, Dongmei; Cui, Jiwen; Yue, Dan; Wang, Zhenling

doi:10.1016/j.jlumin.2012.06.015

Cited by 18 publications

(5 citation statements)

References 37 publications

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“…In addition, core-shell phosphor materials are cheaper than pure phosphor materials, because silica is cheaper than phosphor materials in terms of unit mass. So far, some approaches that adopt silica as template have been used to fabricate core-shell structural rare earth orthophosphates (REPO 4 ), such as hydrothermal route [16] and sol-gel process [29,30]. However, they often suffer from the requirements of high temperature, tedious procedures and special additives.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Dai¹,

Lv²,

Li³

et al. 2015

Materials & Design

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Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Dai¹,

Lv²,

Li³

et al. 2015

Materials & Design

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“…This phenomenon leads to a decrease in the fluorescence emission intensity at higher concentrations of MPDMAPP doped PC composites. These are competing effects, where the increase in fluorescence emission up to 5 wt % is due to enhanced excitation rate but which is then offset by the quenching of the emission intensity at higher doping concentration . Hence, the increase in MPDMAPP doping in PC subsequently emits fluorescence with shift of 40 nm towards higher wavelength side in the green spectral region.…”

Section: Resultsmentioning

confidence: 99%

Positron annihilation and other experimental studies on polycarbonate/MPDMAPP nanocomposite

Thimmaiah

Bhajantri

Nambissan

et al. 2015

J of Applied Polymer Sci

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The composite films of polycarbonate (PC) filled with 1‐(4‐methylphenyl)‐3‐(4‐N,N‐dimethylaminophenyl)‐2‐propen‐1‐one (MPDMAPP) were prepared by solution casting. The FT‐IR results of the prepared films confirmed the hydrophobic and dipole‐dipole interaction between PC and MPDMAPP, which is a major driving force for the formation of charge transfer complex (CTC). UV–Vis absorption spectra showed three peaks and the optical band gap Eg for pure PC is 4.31 eV which decreased to 4.1 eV after 15 wt % doping. The fluorescence spectral results show a strong emission and quenching in the wavelength region 510 to 550 nm for 408 nm excitation due to increase in amorphousness, which is observed in X‐ray diffraction (XRD) results. The decrease in ortho‐positronium (o‐Ps) lifetime τ3 and corresponding intensity I3 from positron annihilation lifetime spectroscopy (PALS) and the S‐parameter from Doppler broadening measurements show both inhibition and quenching of Ps formation in the PC/MPDMAPP composite due to the presence of dimethylamino N(CH3)2 group. The mechanical properties such as Young's modulus, tensile strength, and stiffness increase with doping concentration and confirmed that the composite films are mechanically stable. The growth of nanostructures of MPDMAPP within PC films is studied with SEM and TEM images and confirms the uniform dispersion and interaction between the functional groups of PC and MPDMAPP. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42053.

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“…For the preparation of the core–shell structures, inverse micelle, double-jet precipitation, template-directed self-assembly, encapsulation of silica NPs by in situ polymerization, bioengineering, and biotemplate techniques are some of the techniques used. − Yuan et al prepared BaTiO 3 /BaTiO 3 @SiO 2 ceramics with layered structure by tape-casting and lamination methods. They reported that by adding an additional SiO 2 layer, the electric field redistribution and the interface blocking effect increased the dielectric breakdown strength .…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Assisted BaTiO₃:Eu³⁺@SiO₂ Core–Shell Superstructures Obtained by Ultrasonication Method: Dormant Fingerprint Visualization and Red Component of White Light-Emitting Diode Applications

Muniswamy

Nagabhushana

Basavaraj

et al. 2018

ACS Sustainable Chem. Eng.

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Nanoparticles (NPs) synthesized via a facile sonochemical route showed excellent assembly of BaTiO 3 :Eu 3+ @SiO 2 superstructures (SS) using CTAB as a surfactant. Crystallite size, phase, surface science, and core−shell confirmation were determined through advanced characterization techniques. Experimental parameters like pH, temperature, and surfactant concentration were varied and resulted in SS with high surface modifications, and the possible mechanisms for the same are reported. Scanning electron microscopy images revealed broomlike structures, and various experimental parameters resulting in them dissolving into freestanding sticks are discussed. CIE chromaticity coordinates were in the range of the orange-red to pure red. Drawbacks associated with the commercial powder dusting method for visualizing dormant fingerprint (DFP), namely, high background scattering and high autofluorescence of the substrate material, were improved with the help of the prepared SS as a dusting powder. Visualization of DFPs and sweat pores on various kinds of surfaces was studied effectively and systematically and revealed the well-defined first-, second-, and third-level ridge particulars with high contrast, high selectivity, and low background interference. These results suggest different strategies to engineer SS and highlights a method to obtain high-resolution DFPs. The prepared compounds are also utilized in antiforging ink and optoelectronics applications.

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Synthesis and photoluminescence of core–shell structured spherical SiO2@YPO4:Tb3+ phosphors via sol–gel process

Cited by 18 publications

References 37 publications

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Positron annihilation and other experimental studies on polycarbonate/MPDMAPP nanocomposite

Surfactant-Assisted BaTiO₃:Eu³⁺@SiO₂ Core–Shell Superstructures Obtained by Ultrasonication Method: Dormant Fingerprint Visualization and Red Component of White Light-Emitting Diode Applications

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Synthesis and photoluminescence of core–shell structured spherical SiO2@YPO4:Tb3+ phosphors via sol–gel process

Cited by 18 publications

References 37 publications

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core–shell phosphors

Positron annihilation and other experimental studies on polycarbonate/MPDMAPP nanocomposite

Surfactant-Assisted BaTiO3:Eu3+@SiO2 Core–Shell Superstructures Obtained by Ultrasonication Method: Dormant Fingerprint Visualization and Red Component of White Light-Emitting Diode Applications

Contact Info

Product

Resources

About

Surfactant-Assisted BaTiO₃:Eu³⁺@SiO₂ Core–Shell Superstructures Obtained by Ultrasonication Method: Dormant Fingerprint Visualization and Red Component of White Light-Emitting Diode Applications