Coverage-dependent crystalline domain structures of a tetracene thin film on H/Si(001)
Bibliographic record
Abstract
Atomic force microscopy, transverse shear microscopy, and friction force microscopy have been used to study coverage-dependent crystalline domain structures of a tetracene film on a hydrogen-passivated Si (001)-2 × 1 surface. Though submonolayer fractals present some nonepitaxial domains, the coalesced first monolayer, which possesses a partial commensurate registration with the substrate lattice, shows two lattice domains (major domains) orthogonally oriented with each other. The second-layer lattice exhibits 90° azimuthal rotation from the first-layer lattice, and the third and subsequent layers show a commensurate registration with their respective underlayers. The major-domain boundaries are not the preferable nucleation sites, indicating a potential energy barrier at the boundary. Meanwhile, the domain structure rigidity increases with the layer height until it saturates on the fourth layer, where the bulklike structure emerges with the formation of two (molecular tilting) subdomains in a major domain. The authors conclude that the structural-phase transition can take place locally wherever the fourth molecular layer emerges, and significant bulklike crystallization occurs at a nominal coverage of ∼3–4 ML.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".