General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF<sub>3</sub> Nanoparticles Doped with Lanthanide Ions (Er<sup>3+</sup>, Nd<sup>3+</sup>, and Ho<sup>3+</sup>)
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Bibliographic record
Abstract
Silica films with Ln 3+ -doped LaF 3 nanoparticles were prepared by sol gel method and their luminescent properties were studied as a function of the temperature. Significant improvements in the luminescent properties, in terms of the lifetime for the 4 I 13/2 level of Er 3+ (∼10.9 ms), 4 F 3/2 level of Nd 3+ (∼171 μs), and 5 F 3 level of Ho 3+ (∼6 μs), were obtained when corresponding nanoparticles are incorporated in silica films rather than the bare ions. In addition to the LaF 3 as the low phonon energy matrix, the absence of lanthanide ion clustering, and the increased distance between the OH groups of the silica matrix and the lanthanide ions, are responsible for the observed improvements in the luminescent properties for nanoparticle incorporated silica films. Lifetime values could be further improved by incorporating core−shell nanoparticles (the doped LaF 3 core surrounded by an undoped shell of LaF 3 ) in the silica matrix, as a result of further reduction of the nonradiative pathways.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it