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Graphene & nanocarbon

One-paragraph summary

Graphene appears in this knowledge base both as a mechanics and fracture problem under extreme loading (reactive MD) and as a membrane / nanopore platform for separations (experimental). Related sp2 carbon chemistry also appears in large-scale pyrolysis simulations of complex hydrocarbon solids. The material page ties these threads together without collapsing distinct physical models (ReaxFF impact simulations vs experimental porous membranes).

Structure and composition notes

Single-layer graphene: hexagonal sp2 carbon network; defects (vacancies, grain boundaries) modify fracture and reactivity. Nanoporous graphene for separations introduces edge chemistry and pore size distributions not captured by pristine sheets.

Properties relevant to group research

  • Mechanics: high strength and strain-to-failure under impact; specific penetration energy metrics vs experiments.
  • Transport: selective water vs ion transport through nm pores (experimental literature cited in Surwade et al.).

Force fields and parameterizations

Reactive ReaxFF studies of graphene often use carbon parameters discussed in the impact paper (paper:2015yoon-carbon-99-20-atomistic-scale-simulations), with caveats about elastic nonlinearity vs REBO-like models for some tensile properties.

Prior simulation protocols

Large nonequilibrium MD for projectile impact; contrasting quasi-static tension is discussed in the same reference set.

Mechanics vs separations (two literatures)

The wiki intentionally keeps supersonic impact simulations (2015yoon-carbon-99-20-atomistic-scale-simulations) distinct from experimental nanoporous membranes for desalination (2015surwade-nat-water-desalination): the former probes bond-breaking carbon mechanics; the latter documents pore statistics and transport measurements that atomistic models may only approximate.

Pyrolysis and coal models (2014castro-marcano-journal-of-a-pyrolysis-large-scale) share sp2/sp3 carbon chemistry with graphene studies but operate on disordered macroscopic solids—see theme-pyrolysis-combustion-organics.

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Key references