Development and initial applications of an e-ReaxFF description of Ag nanoclusters (AIP author proof PDF)
Summary¶
This wiki row registers an American Institute of Physics author-proof PDF for the Journal of Chemistry Physics article on e-ReaxFF parametrization for silver nanoclusters (DOI 10.1063/5.0018971). Proof-stage files can contain author queries, provisional pagination, and layout artifacts; for stable figure numbering and final wording, readers should prefer the version-of-record PDF curated on [[2020evangelisti-j-chem-phys-development-initial]]. Substantively, the publication develops an explicit-electron ReaxFF (e-ReaxFF) parametrization for silver and applies it to small Ag\(_N\) clusters (up to \(N \le 20\) in the work’s scope), comparing two-dimensional versus three-dimensional isomer energetics against quantum-chemistry references, and illustrating dynamics including silver–halide redox and electron-rich plasmon-like behavior in molecular dynamics. The van Duin and Fichthorn collaboration places the work in the group’s lineage of reactive and charge-aware force fields beyond classical ReaxFF for main-group oxides alone.
Methods¶
Provenance: This slug tracks the AIP author-proof PDF; 2020evangelisti-j-chem-phys-development-initial is the canonical wiki target for Methods tables.
Force-field training (e-ReaxFF): QM references include DFT and CCSD(T) for Ag\(_N\) isomers; e-ReaxFF adds explicit classical electrons and a dihedral penalty to capture 2D/3D competition; fit to barriers and energy orderings as in the JCP article.
MD application (condensed from VOR, match 2020evangelisti-j-chem-phys-development-initial): Molecular dynamics in the standalone ReaxFF code (engine slot); isolated Ag\(_N\) cluster cells with open/non-bulk boundary treatment (boundary slot); on the order of 10–200 Ag atoms per cell in the training sizes cited on the VOR page (system slot). NVT; Nosé–Hoover thermostat; 0.250 fs timestep. Production and equilibration lengths in ps as in the JCP article (duration slot). Thermostated runs including 300 K setpoints in application sections (temperature slot). Barostat: N/A. Hydrostatic pressure: N/A. Electric field: N/A. Enhanced sampling: N/A.
Findings¶
Reported conclusions match the curated article page: the e-ReaxFF model tracks low-\(N\) preference for two-dimensional lowest-energy Ag structures and captures the onset of three-dimensional motifs near Ag\(_7\) in the sub-twenty-atom regime, improving on embedded-atom descriptions for planar versus nonplanar competition where cited in the paper. Application sections discuss oxidation-state changes in silver-halide-like environments and electron dynamics in large-scale MD. Quantitative energies, cluster geometries, and figure references should be quoted from the version-of-record note, not from the proof PDF alone. Explicit-electron ReaxFF extends the group’s reactive modeling toolkit into coinage-metal clusters where classical fixed-charge models omit redox flexibility.
Limitations¶
Author proofs may differ from the published article in copy editing, figure resolution, and page breaks; [[2020evangelisti-j-chem-phys-development-initial]] is the canonical wiki target for citations. e-ReaxFF remains an empirical model; excited states and quantitative optical properties require validation beyond the fitted training sets.
Relevance to group¶
Provenance duplicate for van Duin-group e-ReaxFF on metallic silver; narrative and MAS anchors live on the VOR page.
Citations and evidence anchors¶
- DOI: 10.1063/5.0018971