Influence of the Surface Field on the Self-Assembly of a Diblock Copolymer Melt Confined in a Cylindrical Nanopore
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Bibliographic record
Abstract
We study the influence of the surface field on lamellar morphologies that form in a diblock copolymer melt confined in a cylindrical nanopore, using self-consistent mean-field theory. By varying the pore diameter and surface field strength and by introducing a slight composition asymmetry, we systematically explore the stability regions of parallel and perpendicular lamellar phases and accurately compute the phase boundaries. When the surface field is weak, or the natural period of the lamellae is incommensurate with the pore size, lamellae perpendicular to the pore wall are preferred. A strong surface preference and/or a small composition asymmetry can lead to the formation of concentric parallel lamellae. In narrow pores, we find that complex structures can exist as equilibrium phases between regions of parallel and perpendicular lamellae. When we reduce the volume fraction of the block preferred by the pore wall, this composition asymmetry competes with the surface preference and can lead to the formation of perpendicular lamellae. This suggests a route to produce perpendicular lamellar phases in the common experimental situation where a surface preference is present. This competition also enables us to characterize the strength of the surface field in the theory.
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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 | 0.001 |
| 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)
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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 it