Comparative Study of H<sub>2</sub>S Gas Sensing: Pristine vs. Cobalt-Functionalized C<sub>2</sub>N Using First-Principles Modeling
Bibliographic record
Abstract
The exceptional physical and electrical characteristics of two-dimensional Nitrogenated Holey Graphene (C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N) devices highlight their significance. C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N-based sensors demonstrate remarkable sensitivity, stability, and responsiveness compared to other solid-state sensors. The conductivity of C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N experiences shifts upon exposure to a wide array of organic and inorganic substances, enabling the detection of various target molecules through these conductivity alterations. Using first-principles transport simulations, a sensor device incorporating Nitrogenated Holey Graphene (C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N) is specifically designed to detect varying concentrations of hydrogen sulfide (H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>S) gas molecules. Through the utilization of the Quantumwise Atomistix Toolkit (ATK), a simulator for nanoscale semiconductor devices, a C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N-based sensor is simulated in this study. This work studies the effectiveness of C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N sensors, both pristine and functionalized with Co, for detecting varying concentrations of hydrogen sulfide (H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>S) gas molecules. Our findings reveal that the Co-functionalized C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N sensor performs better than the pristine counterpart. Through simulations, we demonstrate the sensor's ability to detect single and double H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>S molecules with 20% higher sensitivity and 15% improved selectivity compared to pristine C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N. This research highlights the potential of C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>N-based sensors in gas sensing applications, including environmental monitoring and industrial safety, and notably in biomedical applications such as medical diagnostics through breath analysis for disease markers. The effectiveness of employing density functional theory for sensor analysis and electronic transport calculations is also highlighted.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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".