“Log-Rolling” Alignment in Friction-Transferred Light-Emitting Conjugated Polymer Thin Films
Bibliographic record
Abstract
Thin films of a water-soluble poly(phenylenevinylene) (PPV) derivative with sulfonate-containing side chains (DPS-PPV) were formed on silica substrates by a solvent-free friction transfer technique. The films were highly aggregated producing “rods” of polymer aligned perpendicular to the drawing direction. This “log rolling” is in contrast with the reported behavior of most comparable polymers, which tend to align along the drawing direction. The photophysical behavior of the friction-transferred film is also different compared with other film formation techniques of the same polymer. Comparison of the steady-state and time-resolved emission characteristics of these films with films coated by the conventional drop-casting method reveals that short-lived fluorescence components are dominant in the highly aggregated friction-transferred polymer films compared to less aggregated drop-cast films in which long-lived emission species are favored. This highlights the importance of the film formation processes on the properties of the film.
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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 | 0.001 |
| 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".