Up-converting nanoparticles synthesis using hydroxyl–carboxyl chelating agents: Fluoride source effect
| Autor: | Marko Nikolić, Ivana Dinić, Zhenquan Tan, Olivera Milošević, Lidija Mančić, Marina Vuković |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Lanthanide
Materials science 010304 chemical physics Solvothermal synthesis Inorganic chemistry Hexagonal phase General Physics and Astronomy Nanoparticle 010402 general chemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry 0103 physical sciences Sodium citrate Physical and Theoretical Chemistry Luminescence Citric acid Fluoride |
| Zdroj: | Journal of Chemical Physics The Journal of Chemical Physics |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | The synthesis of lanthanide doped up-converting nanoparticles (UCNPs), whose morphological, structural, and luminescence properties are well suited for applications in optoelectronics, forensics, security, or biomedicine, is of tremendous significance. The most commonly used synthesis method comprises decomposition of organometallic compounds in an oxygen-free environment and subsequent infliction of a biocompatible layer on the particle surface. In this work, hydroxyl-carboxyl (- OH/ - COOH) type of chelating agents (citric acid and sodium citrate) are used in situ for the solvothermal synthesis of hydrophilic NaY0.5Gd0.3F4:Yb,Er UCNPs from rare earth nitrate salts and different fluoride sources (NaF, NH4F, and NH4HF2). X-ray powder diffraction showed crystallization of cubic and hexagonal NaY0.5Gd0.3F4:Yb,Er phases in nano- and micro-sized particles, respectively. The content of the hexagonal phase prevails in the samples obtained when Na-citrate is used, while the size and shape of the synthesized mesocrystals are affected by the choice of fluoride source used for precipitation. All particles are functionalized with citrate ligands and emit intense green light at 519 nm and 539 nm (2H11/2, 4S3/2 → 4I15/2) under near infrared light. The intensity of this emission is distressed by the change in the origin of phonon energy of the host matrix revealed by the change in the number of the excitation photons absorbed per emitted photon. Published version: [https://cherry.chem.bg.ac.rs/handle/123456789/4242] This is the peer-reviewed version of the article: Dinić Ivana, Vuković Marina, Nikolić Marko G., Tan Zhenquan, Milošević Olivera, Mančić Lidija, "Up-converting nanoparticles synthesis using hydroxyl-carboxyl chelating agents: Fluoride source effect" The Journal of Chemical Physics, 153, no. 8 (2020):084706,[https://doi.org/10.1063/5.0016559] |
| Databáze: | OpenAIRE |
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