Tuning the Band Gap of MoS<sub>2</sub> Single Layer with Aryl Diazonium Salts
Bibliographic record
Abstract
We report on the surface functionalization of molybdenum disulfide flakes (MoS 2 ) with 4-nitrobenzenediazonium (4-NBD) tetrafluoroborate salt to alter their electronic band gap and subsequent excitonic properties. The 2D materials composed of a few layers were grown by chemical vapor deposition over SiO 2 /Si. Raman and photoluminescence analyses of the MoS 2 functionalized surface were conducted using confocal measurements to evaluate the spontaneous formation of polyaryl clusters and azo bonds at the surface of MoS 2 and their stability under laser exposure. Gap mode tip-enhanced Raman and photoluminescence measurements on MoS 2 flakes transferred onto the Au surface were conducted in the vicinity of the polyaryl clusters, enabling the mapping of the excitons and revealing the formation of charged excitons. These results are indicative of a charge transfer process from the MoS 2 flake to the diazonium salts, which in turn act as a p-type dopant for MoS 2 . Contact potential difference measurements were conducted to quantify the electronic work function of the modified MoS 2 surface.
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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".