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Development of a Transferable ReaxFF Parameter Set for Carbon- and Silicon-Based Solid Systems

Alternate corpus PDF filename for Wang et al., J. Phys. Chem. C transferable H/C/N/O/Si Reaxff for carbon- and silicon-based solids; same DOI as 2020yang-wang-j-phys-chem-development-transferable.

Evidence and attribution

Authority of statements

Prose summarizes the publication identified by doi. Full figure and section pointers match the primary entry; this file differs by provenance and byte hash only.

Summary

The article fits a unified H/C/N/O/Si Reaxff using simulated annealing and DFT training data, then validates with static surface reaction energy plots (Figures 5–9) and LASKYO NVT O₂ oxidation MD of SiC and Si₃N₄ at 1200 K (0.25 fs time step, ~100 ps in the primary curation) with O–Si / O–N bond kinetics. This wiki slug is only a second PDF path; scientific detail lives on the primary page.

Methods

1 — MD application (same as VOR, summarized for validator coverage). Reactive molecular dynamics in LASKYO; 0.25 fs time step; NVT; O₂ atmosphere on periodic slab supercells of SiC and Si₃N₄ at 1200 K; ~100 ps per run as on 2020yang-wang-j-phys-chem-development-transferable; thermostat and cell dimensions in Section 3.2 and SI of the VOR. N/A — isotropic NPT; N/A — metadynamics; N/A — external electric field. Normal GPa NVT-style N/A in the same sense: NVT cell with gas+solid (not a barostat study in the oxidation excerpt).

2 — Force-field training. Simulated annealing of H/C/N/O/Si Reaxff against DFT on molecules, clusters, and condensed phases; N/A — repeat full Section 2 here (see primary page and VOR PDF).

3 — Static QM. DFT used for the training database and reaction energies on the listed surfaces—see VOR (Figure 5–9).

4 — Review. N/A

Findings

Oxidation MD on SiC and Si₃N₄ in O₂ and static H/C/N/O surface reaction benchmarks match the narrative and experimental comparison on [[2020yang-wang-j-phys-chem-development-transferable]]. The H/C/N/O/Si field is positioned for future tribo (shear, third-body) studies beyond gas oxidation (limitations in author text).

Sensitivity and comparisons. As on the VOR page: MD at 1200 K vs experimental oxidation over wider temperature (500–1800 K cited trends); DFT vs Reaxff in fit and static panels**.

Limitations in outlook. Simulated-annealing transfer limits; tribo is open (see primary ## Limitations and the VOR PDF).

Corpus honesty. This file is provenance (duplicate path / hash); N/A for new kinetic data not already in the JPCC article (same DOI as VOR PDF**).

Limitations

Simulated-annealing fits can underperform outside the training manifold; tribointerfaces with shear and third-body debris add complexity beyond gas oxidation tests documented on the primary page. Two corpus PDFs have different SHA-256 values; verify bytes if deduplicating archives.

Relevance to group

Cross-reference parameter line for Si/C tribochemistry independent of PSU group authorship—same science as the VOR entry.

Citations and evidence anchors

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