[gmx-users] Desolvation or hydration free energy of an ION

[Alex]

Hello gromacs user,

I was wondering if anybody has experience with the hydration or desolvation
free energy of an ION for example Na+, using alchemical free energy
perturbation method?

Actually in my case, I would like to calculate the difference between free
energy of "Na+" when it is close to a solid slab in aqueous solutions,  and
when it is far away from the slab inside bulk water.

Thanks.

Regards,
Alex