Effect of Solvent on the Crystal Growth of One-Dimensional ZrO<sub>2</sub>−TiO<sub>2</sub> Nanostructures
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Bibliographic record
Abstract
Previously we reported the synthesis of unique nanotubular bimetallic oxides, ZrO 2 −TiO 2, in supercritical carbon dioxide (scCO 2 ). This study examines the role of the solvent on crystal growth by synthesizing the bimetallic nanomaterials using several common sol−gel solvents of varying dielectric strength, including scCO 2, hexane, xylenes, isopropanol, and ethanol. During synthesis, the gelation times, t g, were measured. After synthesis, all materials were dried similarly in scCO 2 to remove the effect of synthesis from drying. The synthesized materials were subsequently characterized by several physicochemical techniques in order to assess the effect of the solvent on the morphology, porous structure, and thermal and crystallization behavior of the nanomaterials. Gelation times were found to follow a direct relationship with the dielectric constant of the solvent. Formation of nanotubular structure was found with scCO 2, whereas the other solvents gave primarily nanorod structures. Theoretical calculations were also performed on determining the solubility parameters of the sol−gel starting materials and bimetallic hexamer intermediates, showing that nanostructure was enhanced by lower dielectric constant solvents.
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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 | 0.003 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| 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) | 0.000 | 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