![]() Furthermore, the PL intensity of the microspheres shows correlation with the cumulative release of DOX. We report an efficient process for preparing monodisperse SiO 2 Y 0.95 Eu 0.05 VO 4 core-shell phosphors using a simple citrate sol-gel method and without. The particle size of the phosphor powder is 30 to. The mol ratio of the core of YVO4: Eu<3+> and the shell of YPO4 is 1:2-8:1. The DOX-loaded carriers demonstrate a similar or even greater anti-cancer activity with respect to the free DOX against HeLa cells. The molarity of the core europium of YVO4: Eu<3+> is 1 to 8 percent.The drug release rate became greater at low pH owing to the increased electrostatic repulsion. It was found that the carriers present a highly pH-dependent drug release behavior due to electrostatic interaction between the silica surface and DOX molecules. Comparing the luminescence processes of YVO4:Eu and core-shell YVO4YF3 nanocrystals with bulk-YVO4:Eu L. The drug release behavior and cytotoxic effect against human cervical carcinoma cells (HeLa cells) of the DOX-loaded carriers were investigated in vitro. JOURNAL OF APPLIED PHYSICS Volume 114, Issue 21, Pages 213903 Publisher. Owing to the large interior space and electrostatic interaction, the porous microspheres show a relatively high loading capacity (438 mg g) and encapsulation efficiency (87.6%) for the anti-cancer drug doxorubicin hydrochloride (DOX). Core-shell-core heterostructural engineering of Y2O3:Eu3+/MCM-41/YVO4:Eu3+ for enhanced red emission and tunable,broadened-band response to excitation. Magnetization-induced enhancement of photoluminescence in core-shell CoFe2O4YVO4:Eu3+ composite Authors. The biocompatibility tests on L929 fibroblast cells using MTT assay reveal low cytotoxicity of the system. Semantic Scholar extracted view of 'Core-shell structured SiO2YVO4:D圓+/Sm3+ phosphor particles: sol-gel preparation and characterization.' by H. 11 Wang H, Yu M, Lin C K and Lin J 2006 Core/shell structured SiO2YVO4: D圓+/Sm3+ phosphor particles: Sol-gel preparation and characterization J. PMID 26513755 ABSTRACT A novel nanoparticle with multilayer core-shell architecture for cell imaging is designed and synthesized by coating a fluorescent YVO4:Eu core with a diblock copolymer, MPEG-b-PMAA. Then, based on the Pechini-type sol-gel and impregnating process, YVO4:Eu3+ nanocrystals were integrated into the channels to form highly luminescent composite microspheres. Liu, Controllable synthesis and size-dependent luminescent properties of YVO4:Eu3+ nanospheres and microspheres, J. ![]() Owing to the protective action of PVP and inhomogeneous etching, mesopores were created in the silica microspheres. Polyvinylpyrrolidone (PVP) was used as a protecting polymer absorbed on the surface of silica microspheres and NaOH was employed as an etching agent. Abstract Porous silica microspheres were fabricated by a facile surface-protected etching strategy.
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