Nanostructured Lanthanide-Doped Lu<sub>2</sub>O<sub>3</sub> Obtained by Propellant Synthesis
Bibliographic record
Abstract
Lu 1.98 Ln 0.02 O 3 (Ln = Nd, Eu, and Er) powders obtained by propellant synthesis were characterized using XRD, SAXS, TEM, and SEM. Samples have a very porous, open morphology with fractal scaling properties. The building blocks of the fractal aggregates are 60−90 nm lanthanide-doped cubic Lu 2 O 3 crystalline particles, which exhibit changes in the lattice parameter proportional to the lanthanide ionic radius. The NIR luminescence spectrum of nanocrystalline Lu 2 O 3:Nd 3+ was measured and emission was observed from the 4 F 3/2 excited state to the 4 I J (9/2, 11/2, 13/2, 15/2) state. The spectral features are very similar to those of a bulk material of identical composition prepared for comparison, though with a noticeable difference in the relative intensity of the 4 F 3/2 → 4 I 9/2 and 4 F 3/2 → 4 I 11/2 transitions. The spectroscopic-quality parameter ( X ) for nanocrystalline samples was calculated and was found to be higher than for the bulk.
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How this classification was reachedexpand
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".