[DFTB-Plus-User] charge density difference calculation

[simin pahlavi]

Dear DFTB+ users,
I have a practical question and I appreciate any help.
I am studying absorption of a molecule on surface and I am interested to see
how wave function or charge density is changed compare to the condition
where there is no surface. It means I should calculate once the charge
density of isolated molecule and once when the molecule is adsorbed on the
surface,and then subtract them. Does anybody knows if we can do this with
waveplot or any other tools n dftb+.
Thanks in advance,
Simin
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