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Yttrium orthovanadate (YVO4) has been widely used as a host material for low- and medium-power diode-pumped solid-state lasers due to its excellent thermal, mechanical, and optical properties. This work demonstrates the synthesis and site symmetry tunning of polycrystalline YVO4: Eu nanoparticles with uniform size and shape using a continuous-ﬂow microreactor at high pressures. High-quality YVO4: Eu nanoparticles were created using a residence time of fewer than 20 seconds. Carefully controlling the heat ﬂux and ﬂow rate can produce the YVO4: Eu nanoparticles showing diﬀerent crystallinity, crystal morphologies, site symmetry around Eu3+, and therefore optical emission. The site symmetry of YVO4: Eu is adjusted without any stoichiometric modiﬁcation of the precursors by simply varying the ﬂow rate and heat ﬂux of the microreactor. The site symmetries of the as-synthesized YVO4: Eu nanoparticles are studied by investigating their photoluminescent emission spectra and computational model of ﬁrst-principle density functional theory (DFT). The DFT model indicates that the oxygen vacancy inﬂuenced the V-O association and the overlap between Eu 4f and V 3d states which can contribute to diﬀerent optical transitions and, therefore, distinct emission spectrum. The use of a continuous ﬂow microreactor at high pressure provides better understandings of the hydrothermal syntheses of functional nanoparticles and enables scalable manufacturing concurrently.
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Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
A class of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.
Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.
A layer of protein coating adsorbed by NANOPARTICLES upon entry into PLASMA or other protein-containing biological fluids, which affects how nanoparticles are internalized by cells and cleared from the body.
Compounds which inhibit the synthesis of proteins. They are usually ANTI-BACTERIAL AGENTS or toxins. Mechanism of the action of inhibition includes the interruption of peptide-chain elongation, the blocking the A site of ribosomes, the misreading of the genetic code or the prevention of the attachment of oligosaccharide side chains to glycoproteins.