Photoacoustic Fourier transform infrared spectroscopy of nanoporous SiOx∕Si thin films with varying porosities
Bibliographic record
Abstract
Nanostructured SiOx∕Si thin films, over a large range of porosities, were deposited by the excimer laser ablation (KrF, 248nm) of Si targets in He; they have been characterized by photoacoustic Fourier transform infrared spectroscopy, which necessitates exposure to air with subsequent oxidation. In particular, the IR Si–O–Si asymmetric stretching region, from 1000 to 1300cm−1, has been found to be composed of four components: P1 at 1045cm−1, P2 at 1060cm−1, P3 at 1090cm−1, and P4 at 1170cm−1. The photoacoustic signals were enhanced with increasing film porosity, as previously found for larger scale porous materials; those for P2–4 also correlated with similar increases in the O–H and C–Hn surface contaminant stretching peaks, indicating their sources to be in the surface region. We demonstrate that the experimental data fully support a previously proposed theoretical relationship, originally developed for powders.
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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 | 0.000 | 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) | 0.000 | 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 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".