Platinum Nanoparticle Interaction with Chemically Modified Highly Oriented Pyrolytic Graphite Surfaces
Bibliographic record
Abstract
Ar, N 2, O 2, and H 2 O radio frequency (13.56 MHz) plasma treatments have been carried out on insulator-supported samples of highly oriented pyrolytic graphite (HOPG). The HOPG surface was found to be minimally damaged by all the plasma treatments, which break C−C bonds and form free radicals in the outermost few layers. These free radicals subsequently react, on exposure to air, forming various oxidation products; both XPS and photoacoustic FTIR indicate that these include C−OH, C O, and −COOH. Pt was deposited onto these samples by evaporation, forming nanoparticles. After plasma treatment, the dimensions of the Pt nanoparticles were ∼3.5−4 nm, compared to ∼6 nm on untreated HOPG, and they no longer diffused laterally; this indicates enhanced interfacial adhesion for all these plasma treatments. The occurrence of oxidation products strongly suggests that the increased Pt nanoparticle adhesion to the treated HOPG surface is due to their presence.
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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) | 0.001 | 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".