Water-soluble Up-conversion Luminescent Nanoparticles
Product Description
Up-conversion nanoparticles are a new generation of fluorescents that rely on physical and chemical principles to convert photons from a low-energy state to a high-energy state. These particles typically absorb energy in the infrared (IR) range and emit energy in the visible or ultraviolet (UV) range. Alfa Chemistry offers water-soluble up-conversion luminescent nanoparticles in the wavelength range of 475 nm-800 nm.
Applications
Photocatalysts
Zhao et al. prepared nanocomposites based on bicrystalline Cd0.5Zn0.5S nanocrystals (T-CZS) and β-NaYF4:Yb3+, Tm3+, Er3+ (UPNs) using a facile hydrothermal method. Their composition, morphology and photocatalytic hydrogen evolution activity were investigated. The photocatalytic hydrogen production performance of T-CZS can be significantly enhanced by the presence of UPNs under low-density NIR light irradiation and simulated sunlight irradiation. The UPNs co-catalysts can convert NIR photons into visible photons. T-CZS can be excited by these visible photons, and thus the response of T-CZS/UPNs to NIR light is significantly promoted. This catalyst design approach can also be used for other NIR-responsive photocatalysts.
Fig. 1 SEM (A), TEM (B), HRTEM (C) images of T-CZS/UPNs-15. (Zhao et al., 2019)
Drug Delivery
Zhou et al. developed a simple but effective strategy to grow a new mUCNPs consisting of a NaYbF4:2%Er core and a mesoporous NaGdF4 shell as a multifunctional therapeutic platform. This mesoporous shell not only improves the strength of the UCL, but also allows these nanoparticles (NPs) to serve as carriers for drug delivery because of its high surface area and the pores available for drug loading. For targeted drug delivery, FAs are also attached to PEI-coated mUCNPs, which allows drug carriers to target many cancer cells. In addition, the prepared core-shell mUCNPs are expected to be used as MR and CT imaging contrast agents due to the presence of gadolinium elements in the shell and ytterbium elements in the nucleus, which are known for their high intrinsic contrast in magnetic resonance (MR) imaging, and computed tomography (CT) imaging.
Fig. 2 Synthesis of mUCNPs for multimodal imaging and cancer-targeting therapy. (Zhou et al., 2014)
Alfa Chemistry can provide a variety of complex and customized fluorescent quantum dot products. Our products involve perovskites precursors, perovskites quantum dots, quantum dot kit, single layer quantum dots, upconverting nanoparticles and other fluorescent quantum dots. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.
References
- Zhao, H. , et al. Modification of twin crystal Cd0.5Zn0.5S photocatalyst with up-conversion nanoparticles for efficient photocatalytic H2-production[J]. International Journal of Hydrogen Energy, 2019, 44(45):24559-24571.
- Zhou, L. , et al. Mesoporous NaYbF4@NaGdF4 core-shell up-conversion nanoparticles for targeted drug delivery and multimodal imaging[J]. Biomaterials, 2014, 35(26):7666-7678.
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