Ionic liquid-based route to spherical NaYF4 nanoclusters with the assistance of microwave radiation and their multicolor upconversion luminescence.
← Research streamA microwave-assisted, ionic liquid (BmimBF4)-based method produced spherical NaYF4 nanoclusters (200–430 nm) formed by self-assembly of small nanoparticles, with size tunable by precursor amounts. Control experiments suggested ionic liquids acted as solvent, …
Study snapshot
Abstract
An ionic liquid (IL) (1-butyl-3-methylimidazolium tetrafluoroborate)-based route was introduced into the synthesis of novel spherical NaYF(4) nanoclusters with the assistance of a microwave-accelerated reaction system. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected area electron diffraction (SAED), energy-dispersive X-ray spectroscopy (EDS) and upconversion (UC) luminescence spectroscopy were used to characterize the obtained products. Interestingly, these spherical NaYF(4) nanoclusters with diameters ranging from 200 to 430 nm are formed by the self-assembly of small nanoparticles. The diameters of the nanoclusters could be easily tuned just by changing the amounts of the precursors. By conducting the control experiments with different ILs or precursors, it is proven that the ILs have played key roles, such as the solvents for the reaction, the absorbents of microwave irradiation, and the major fluorine sources for the formation of the NaYF(4) nanocrystals. The UC luminescence properties of the Ln(3+) codoped NaYF(4) were measured, and the results indicate that the nanoclusters obtained in BmimBF(4) exhibit excellent UC properties. Since this IL-based and microwave-accelerated procedure is efficient and environmentally benign, we believe that this method may have some potential applications in the synthesis of other nanomaterials.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
A microwave-assisted, ionic liquid (BmimBF4)-based method produced spherical NaYF4 nanoclusters (200–430 nm) formed by self-assembly of small nanoparticles, with size tunable by precursor amounts. Control experiments suggested ionic liquids acted as solvent, microwave irradiation absorbent, and major fluorine source; nanoclusters made in BmimBF4 showed excellent upconversion luminescence properties.
Outcomes measured
- Synthesis/formation of spherical NaYF4 nanoclusters
- Nanocluster size (200–430 nm) and tunability via precursor amounts
- Role of ionic liquids as solvent/microwave absorbent/fluorine source
- Upconversion luminescence properties of Ln3+ codoped NaYF4
Limitations
- No microwave exposure parameters (e.g., frequency, power, duration) reported in the abstract
- Not a health/biological effects study; focuses on materials synthesis and characterization
- No sample size or quantitative statistical results provided in the abstract
View raw extracted JSON
{
"study_type": "in_vitro",
"exposure": {
"band": "microwave",
"source": "microwave-accelerated reaction system",
"frequency_mhz": null,
"sar_wkg": null,
"duration": null
},
"population": null,
"sample_size": null,
"outcomes": [
"Synthesis/formation of spherical NaYF4 nanoclusters",
"Nanocluster size (200–430 nm) and tunability via precursor amounts",
"Role of ionic liquids as solvent/microwave absorbent/fluorine source",
"Upconversion luminescence properties of Ln3+ codoped NaYF4"
],
"main_findings": "A microwave-assisted, ionic liquid (BmimBF4)-based method produced spherical NaYF4 nanoclusters (200–430 nm) formed by self-assembly of small nanoparticles, with size tunable by precursor amounts. Control experiments suggested ionic liquids acted as solvent, microwave irradiation absorbent, and major fluorine source; nanoclusters made in BmimBF4 showed excellent upconversion luminescence properties.",
"effect_direction": "unclear",
"limitations": [
"No microwave exposure parameters (e.g., frequency, power, duration) reported in the abstract",
"Not a health/biological effects study; focuses on materials synthesis and characterization",
"No sample size or quantitative statistical results provided in the abstract"
],
"evidence_strength": "insufficient",
"confidence": 0.74,
"peer_reviewed_likely": "yes",
"keywords": [
"ionic liquid",
"microwave-assisted synthesis",
"NaYF4",
"nanoclusters",
"upconversion luminescence",
"BmimBF4",
"lanthanide codoping"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1021/la904545a
PubMed: 20085339