Water-Mediated Self-Assembly of 16-Mercaptohexadecanoic Acid on GaAs (001)
Bibliographic record
Abstract
Self-assembled monolayers (SAMs) of alkanethiols have been widely investigated to generate both specific functionality and increased chemical/photonic stability of III–V semiconductor surfaces. Because of the availability of the COOH terminal group, the 16-mercaptohexadecanoic acid (MHDA) has often been investigated to engineer interfaces involving proteins, nucleic acids, and other biomolecules. Typically, MHDA SAMs have been deposited by incubating semiconductor substrates in MHDA/ethanol solutions. We have investigated the role of water on the process of MHDA SAM formation on the GaAs (001) surface, and we report on the formation of increasing quality MHDA SAM in proportion of the concentration of water mixed with ethanol, up to 50%. The transmission Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, and water contact angle measurements suggest that MHDA SAM obtained from the ethanol/water 1:1 solution represent a superior quality carboxylic acid-terminated SAM on GaAs (001) reported to date.
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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".