Surface passivation of (001) GaAs with self-assembled monolayers of long-chain thiols
Bibliographic record
Abstract
Passivation of (001) GaAs surface was investigated with self-assembled monolayers (SAMs) of a variety of thiols having various methylene chain length and terminal groups. The effect of passivation was monitored by measuring the intensity of the GaAs-related photoluminescence (PL) signal excited with lasers operating either at 683 or 248 nm wavelengths. Generally, for each case of the thiol treated surface the PL signal was more intense than that from non-treated samples. Additionally, it was found that the thiol terminal groups play an important role in determining the methylene chain orientation in the SAMs and consequently the efficiency of the passivation. The methyl terminated methylene chain formed a layer of a closely packed and relatively thick film, which resulted in a significantly increased PL signal. In contrast, carboxylic acid group (-CO<sub>2</sub>H) terminated methylene chains formed thin and less compacted films, leading to only a slightly increased PL signal and less efficient passivation of the GaAs surface.
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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 | 0.001 | 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 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".