Electro-Microfluidic Sensor for Quantitative Detection of Microplastics in Saline Freshwater
Bibliographic record
Abstract
This thesis investigates a DC microfluidic sensor incorporating a Wheatstone bridge and MXene-coated microwires to detect and quantify microplastics in freshwater with varied salinity. The study addresses the limitations of traditional detection methods, particularly in higher freshwater salinity where microplastics exhibit reduced electrophoretic mobility. The sensor's performance was evaluated across a range of microplastic concentrations (1–25 ppm) suspended in saline solution with varying NaCl concentrations (0–1000 ppm) to assess sensitivity and detection limits. Results demonstrated a significant reduction in electrical resistance as microplastics accumulated at the anode, indicating successful detection at lower salinities. However, at higher salt concentrations, microplastic accumulation and sensor sensitivity declined. Modifications, including constant current application and MXene functionalization, enhanced accumulation rates, and detection performance. Future research is required to investigate diverse microplastic types, shapes, and biological interferences to improve real-world applicability. This work provides a foundation for low-cost, sensitive microplastic detection in aquatic environments.
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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 | 0.001 | 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".