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Formation of incipient soot particles from polycyclic aromatic hydrocarbons: A ReaxFF molecular dynamics study

Evidence and attribution

Authority of statements

Prose sections below (Summary, Methods, Findings, etc.) are curated summaries of the publication identified by doi, title, and pdf_path in the front matter above. They are not new primary claims by this wiki.

For definitive numerical values, reaction schemes, and interpretations, use the peer-reviewed article (and optional records under normalized/papers/ when present)—not this page alone.

Summary

Corpus note: this slug registers a second PDF path (papers/QianMao_Carbon_Soot_2017.pdf) for the same Carbon (2017) ReaxFF study as [[2017mao-carbon-121-2-formation-incipient]] (papers/Mao_Qian_Carbon_soot_2017.pdf). ReaxFF MD follows incipient soot formation from PAH monomers (naphthalene through circumcoronene) across 400–2500 K. At low temperature, stacked clusters form by physical association; intermediate temperatures narrow which large PAHs remain productive; at 2500 K, chemical growth yields graphitizing particles with rising C/H and morphologies spanning fullerene-like cages to bridge-linked stacks for the heaviest aromatics. The work targets soot inception debates in combustion modeling (Tsinghua / UCL / van Duin collaboration). Soot nucleation remains a multiscale bottleneck because gas-phase PAH chemistry couples to particle coagulation and carbonization on ns–μs timescales difficult to unify in single models (introduction themes; sibling page).

Methods

A — Force-field training / fitting: Same combustion ReaxFF PAH parametrization as [[2017mao-carbon-121-2-formation-incipient]].

B — Molecular dynamics / sampling: Identical LAMMPS ReaxFF protocol to [[2017mao-carbon-121-2-formation-incipient]] (100 Å cubic periodic boundary conditions, 0.25 fs, NVT production 2 ns at each reported temperature, Nosé–Hoover thermostat with 100 fs damping, 50× monomer replicas, etc.—see sibling for full narrative). System size & composition: same 50-copy PAH cells as the primary page (e.g. ~900 atoms for 50 naphthalene molecules as a lower bound; larger PAHs toward ~10000 atoms per cell—see sibling/pdf_path). N/A — barostat / pressure: NVT cells only.

C — DFT / static QM: Not used as summarized here.

D — Review / non-simulation framing: Corpus duplicate registration—mirror substantive Methods/Findings edits on [[2017mao-carbon-121-2-formation-incipient]] first.

Findings

Outcomes and mechanisms. Same soot inception story as the primary page: physical stacking at low T, selective chemical productivity at intermediate T, and high-T graphitizing chemistry with bridged stacks/fullerene-like motifs for large PAHs.

Comparisons / sensitivity / limitations. Mirror [[2017mao-carbon-121-2-formation-incipient]]; this duplicate exists only for binary provenance (papers/QianMao_Carbon_Soot_2017.pdf).

Corpus / PDF honesty. Duplicate PDF of the same DOI; do not let narrative drift from the primary slug.

Limitations

Keep one DOI for citations; retain both PDF hashes only for binary provenance tracking.

When updating scientific prose, edit [[2017mao-carbon-121-2-formation-incipient]] first, then mirror non-provenance changes here to prevent content divergence between duplicate ingests.

Science reminder: incipient soot mechanisms summarized here are identical to the primary page—differences should only reflect PDF byte provenance, not alternate chemistry claims.

Chunking note: substantive edits here should be mirrored on the primary page so Phase 5 chunk hashes stay aligned for retrieval pipelines that deduplicate by DOI.

Relevance to group

Duplicate corpus registration for the van Duin / Luo soot nucleation paper.

Citations and evidence anchors

  • DOI: https://doi.org/10.1016/j.carbon.2017.06.009 — papers/QianMao_Carbon_Soot_2017.pdf (duplicate of papers/Mao_Qian_Carbon_soot_2017.pdf entry).