Diffusion within the silica network of sodium atoms initially located outside the surfaces of an amorphous silica film was studied. The structural and dynamic quantities were also studied. It was found that the local environment of the sodium atoms was close to the local environment of the sodium atoms in bulk sodo-silicate glasses obtained by quenching. The dynamics of the Na+ cations was also analyzed.

Sodium Diffusion Through Amorphous Silica Surfaces: a Molecular Dynamics Study. Rarivomanantsoa, M., Jund, P., Jullien, R.: Journal of Chemical Physics, 2004, 120[10], 4915-20