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 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 | 0.000 |
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 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".