Investigating the Mechanism of Ion Concentration Polarization Within Nanofluidic Hydrogel Membranes: Experiment and Simulation
Bibliographic record
Abstract
Abstract Ion concentration polarization (ICP) is an electrokinetic phenomenon observed near ion‐selective membranes in micro‐nanofluidic systems, affecting ion transport and localization. This process is essential for biosensing, desalination, energy storage, and electrochemical devices. This study combines experimental techniques and all‐atom molecular dynamics (MD) simulations to investigate the mechanisms underlying ICP. Electrostatic potential profiles across the nanochannel are analyzed, examining the effects of ionic strength, electric field strength, and membrane surface charge density on RNA localization and ion trapping. Simulations revealed a strong dependence of RNA localization on ionic strength. Cations localized by the electric field induced ion correlations, amplified by hydrostatic pressure gradients that led to vortex formation and biomolecule localization. Intermediate ionic strengths most effectively induced ICP. This study provides atomic‐level insights into ICP mechanisms, advancing understanding of this phenomenon and guiding the design of next‐generation ion‐selective membranes.
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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 | 0.000 |
| 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 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".