Ion sizes and finite-size corrections for ionic-solvation free energies
1997; American Institute of Physics; Volume: 107; Issue: 21 Linguagem: Inglês
10.1063/1.475219
ISSN1520-9032
AutoresGerhard Hummer, Lawrence R. Pratt, Angel E. Garcı́a,
Tópico(s)Scientific Research and Discoveries
ResumoFree energies of ionic solvation calculated from computer simulations exhibit a strong system size dependence. We perform a finite-size analysis based on a dielectric-continuum model with periodic boundary conditions. That analysis results in an estimate of the Born ion size. Remarkably, the finite-size correction applies to systems with only eight water molecules hydrating a sodium ion and results in an estimate of the Born radius of sodium that agrees with the experimental value.
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