Replacing the Al<sub>2</sub>O<sub>3</sub> Shell on Al Particles with an Oxidizing Salt, Aluminum Iodate Hexahydrate. Part II: Synthesis
Bibliographic record
Abstract
The main reaction mechanism that replaces the Al 2 O 3 passivation layer on Al nanoparticles with an energetic AIH salt is demonstrated. The reaction mechanism is pH dependent and utilizes electrostatic forces that occur between the Al 2 O 3 passivation layer and free hydrogen atoms (H + ) in solution. When Al particles are added to highly acidic solutions, free H + polarize the Al–O bonds in Al 2 O 3, resulting in the formation of H 2 O and free Al 3+ cations that are complexed by water molecules and exist as [Al(H 2 O) 6 ] 3+ in aqueous solutions. The concentration of AIH is limited by the amount of [Al(H 2 O) 6 ] 3+ that forms from the polarization reaction between free H + and the initial Al 2 O 3 concentration. The proposed mechanism describes a stoichiometric reaction, but deviations from the stoichiometric reaction are expected with varying equivalence ratios (ER). The polarization mechanism is confirmed by measuring deviations in concentration of final AIH mixtures as a function of ER. A salt formation theory dependent on pH and p K a is used to demonstrate how the final AIH concentrations can be estimated at ER values that are not stoichiometric.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".