Due to the high atomic number of lutetium and the low phonon energy of the fluoride matrix, Lu-based fluoride nanoparticles doped with active lanthanide ions are potential candidates as bioprobes in both X-ray computed tomography and luminescent imaging. This paper shows a method for the fabrication of uniform, water-dispersible Eu:(HO)LuF nanoparticles doped with different Eu contents. Their luminescent properties were studied by means of excitation and emission spectra as well as decay curves. The X-ray attenuation capacity of the phosphor showing the highest emission intensity was subsequently analyzed and compared with a commercial contrast agent. The results indicated that the 10% Eu-doped (HO)LuF nanoparticles fabricated with the proposed polyol-based method are good candidates to be used as dual probes for luminescent imaging and X-ray computed tomography.
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http://dx.doi.org/10.3390/nano9081153 | DOI Listing |
Luminescence
February 2025
BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, Seoul, Republic of Korea.
A novel fluorescence-based sensor has been developed for the sensitive detection of malathion, an organophosphorus pesticide, using sulfur-doped quantum dots (SQDs) embedded within graphitic carbon nitride (g-C₃N₄) nanosheets. The SQDs were synthesized through a hydrothermal method, whereas the g-C₃N₄ nanosheets were produced via an exfoliation process. The resulting SQDs@g-C₃N₄ nanocomposite demonstrated outstanding performance for malathion detection in food samples, exhibiting a wide linear detection range of 10-120 μM and an exceptionally low detection limit of 0.
View Article and Find Full Text PDFAdv Mater
January 2025
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
Supported nanoparticles incorporating catalytically attractive nonmetal elements have gained significant attention as a promising strategy for enhancing catalytic activity in various industrial applications. This study presents an innovative one-pot synthesis method for fabricating hybrid catalysts, which simultaneously modifies surface properties through the precipitation of nanoparticles with the concurrent incorporation of nonmetal elements. The underlying concept is to synchronize the temperature required for particle formation with that of nonmetal incorporation by adjusting the oxygen chemical potential of the host oxide.
View Article and Find Full Text PDFLuminescence
February 2025
School of Chemical Engineering, Sichuan University, Chengdu, Sichuan, China.
Copper ions (Cu) play a crucial role in biological processes; however, excessive intake can result in severe health problems. Current methods for detecting copper ions are both expensive and complex. Therefore, there is a need for efficient and straightforward visual detection methods.
View Article and Find Full Text PDFAnal Chem
January 2025
Institute of Physics of Materials of the Czech Academy of Sciences, Brno 616 00, Czech Republic.
We present a simplistic and absolute method for estimating the number concentration of nanoparticles. Macroscopic volumes of a nanoparticle dispersion (several μL) are dropped on a glass surface and the solvent is evaporated. The optical microscope scans the entire surface of the dried droplet (several mm), micrographs are stitched together (several tens), and all nanoparticles are counted (several thousand per droplet) by using an artificial neural network.
View Article and Find Full Text PDFRSC Adv
January 2025
College of Chemistry and Chemical Engineering, Lingnan Normal University Zhanjiang 524048 China
Manganese dioxide (MnO), lauded for its biocompatibility and distinctive optical and physical characteristics, has become an indispensable material in the biomedical field, showing immense potential in disease detection, treatment, and prevention. Particularly, the ability of MnO nanoparticles to oxidize glutathione (GSH) to its oxidized form has positioned them as pivotal players in GSH sensing. However, conventional preparation methods, whether top-down or bottom-up, often result in nanoparticles that require multi-step processing and modification to achieve good dispersion in physiological conditions, which is both time-consuming and complex.
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