Introduction to Up Conversion Nanoparticles
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Through extremely facile RT (room temperature) co-precipitation method in mixed deionized water and ethanol solution, cubic KYF4:10%Yb/5%Er up-conversion nanoparticles with excellent emission intensity and desirable fluorescence lifetime after annealing under 974 nm pulsed laser excitation have been successfully synthesized.
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A novel variable-resistance sensor composed of up-conversion nanoparticles (NaYF4:Yb3+,Er3+) and reduced graphene oxide (RGO) is designed based on characteristics of a negative temperature coefficient (NTC) resistive element.
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In this work, β-NaYF4:Yb3+,Tm3+,Er3+ up-conversion nanoparticles (UPNs) are prepared by a hydrothermal process and the corresponding nanocomposite photocatalyst (twin crystal Cd0.
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Fe3O4 nanoparticles were prepared using the solvothermal method, and a layer of mesoporous SiO2 was coated onto them using sol-gel and etching processes, then these ultra-small up-conversion nanoparticles (UCNPs) were loaded into the porous structure through electrostatic conjunction and physical absorption.
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This review highlights recent progress that has been made in the development of nanoparticle-based assays and focuses on the analytical potential of nanomaterials, such as Au/Ag nanoparticles (Au/Ag NPs), carbon-based nanoparticles (CBNs), magnetic nanoparticles (MNPs), Quantum dots (QDs) and novel nanomaterials, including up-conversion nanoparticles (UCNPs), metal-organic frameworks (MOFs) and nanomaterial-functional DNA intelligent hydrogels, as well as hybrid nanostructures.
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One of the easiest ways to utilize the NIR is to incorporate NIR active materials in PSCs such as up-conversion nanoparticles (UCNPs); however, such a stratergy is not simple to adopt in PSCs due to the inherent vurnerability of perovskite materials towards moisture.
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Herein, fluorescent NaYF4:Yb/Tm up-conversion nanoparticles (UCNPs), which can emit blue fluorescence upon 980 nm near-infrared (NIR) irradiation, have been employed in the imaging of LFPs with high contrast and high sensitivity.
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The enhanced sensitivity of up-conversion luminescence is imperative for the application of up-conversion nanoparticles (UCNPs).
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Among all types of inorganic NPs, lanthanide-doped up-conversion nanoparticles (UCNPs) have shown excellent potential for biomedical applications, especially for multimodal bioimaging including fluorescence and electron microscopy.
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A photodynamic aggregation-induced emissive (AIE) fluorophore, characterized by near-infrared (NIR) emission, was created based on a fluorescence resonance energy transfer (FRET) donor of appreciable NIR up-conversion nanoparticles (UCNPs) and acceptor of immense fluorescence emissive AIEgen.
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In this study, up-conversion nanoparticles (UCNPs) were embedded between the photoactive layer and anode interface to harvest IR light.
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Meanwhile, lanthanide ion-doped up-conversion nanoparticles (UCNPs) can be excited by a multi-photon process similar to THG, but its interaction or resonance with THG has not been studied to date.
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To fully utilize this combination, we herein designed a nanolongan delivery system, which possessed a typical structure of one core (up-conversion nanoparticles, UCNP) in one gel particle (Fe3+ cross-linked oxidized starch) with multiple on-demand conversions.
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In this review, we will discuss recent innovations about mitochondria targeting inorganic nanocarriers for probing mitochondrial function, as diagnostic tools and potential therapeutic agents, which including carbonaceous nanomaterials, Au nanomaterials, mesoporous silica nanoparticles, magnetic iron oxides nanoparticles, up-conversion nanoparticles, and other multifunctional inorganic nanomaterials.
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Based on NaYF4:Yb, Er up-conversion nanoparticles (UCNPs), mesoporous SiO2 was modified on the surface combined with photosensitizer Chlorin e6 (Ce6) molecules, which could be excited by red emission of Er3+ under the 980 nm laser.
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Titanium (Ti) mesh-supported “TiO2 nanowire arrays (TNWAs)/Yb-Er-F tri-doped TiO2 up-conversion nanoparticles (YEF-TiO2-UCNPs)” composite structures were prepared as photoanodes of the flexible dye-sensitized solar cells (DSSCs) by using hydrothermal and spin-coating approaches.
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In this work, the near-infrared-activated NaYF4:Yb,Er up-conversion nanoparticles (UCNPs) were synthesized and covalently decorated with sub-10 nm gold nanoparticles (AuNPs) in a 10 min reaction.
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Here, we designed a smart multifunctional nanoplatform by coating a core-shell composite (mesoporous silica encapsulated up-conversion nanoparticles (UCNPs) and chlorin (Ce6) with degradable calcium phosphate, followed by the loading of doxorubicin (DOX).
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The embedded up-conversion nanoparticles (UCNPs) could efficiently convert NIR to UV-vis which cleaved the linker to remove PEG.
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