Confinement effects on electromigration of long DNA molecules in an ordered cavity array
Bibliographic record
Abstract
Confinement effects on the electromigration of long dsDNA molecules in an array of well-ordered, molecular sized cavities interconnected by nanopores are described. The array was prepared by replicating the structure of a colloidal crystal of microspheres in a polymer matrix. Both conformation and mobility studies show that the electrophoretic behavior of large DNA molecules is distinct from that in gels and other microfabricated sieves, showing a peak in mobility versus electric field, and an inversion in the separation order with field strength. A simple model was proposed to interpret this unexpected observation qualitatively. We conclude that the molecular behavior of DNA can be modified by the combination of entropic effect and electric trapping as a consequence of both unique geometry and conductivity of this cavity array material. This approach provides insights for design and optimization of on-chip molecular sieving structures for rapid separation of long DNA molecules. It may lead to a promising material for manipulation and size fractionation of other biological macromolecules.
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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) | 0.000 | 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 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".