Summary of Molecular Dynamics Simulations of
1. Polyampholytes take the forms of
at low and high temperatures, respectively. (Room temperature
is between them.) The volume change path is
single valued under
the Coulomb forces, which becomes double valued and
appears when short-range attraction forces coexist.
2. Loosely-connected polyampholytes
crystallize to a
very low temperatures, because electrostatic repulsion inhibits the
crystallization to fcc.
Usual polyampholytes end up with amorphous.
Upon increase in salt ionic strength for constant temperature,
nonneutral polyampholytes show
to neutral polyampholyte state, then expanding to noncharged polymer
The polyampholyte volume becomes minimum when the
salt ionic strength is the same as that of polyampholytes.
Structure of polyampholytes, occurrence of hysteresis
Phys.Rev. E56, p.5798-5808 (1997).
Multichain polyampholytes and added salt
J.Chem.Phys.110, p.8176-8188 (1999).
Coulomb crystallization to bcc of polyampholytes, and
the effect of salt
Phys.Rev. E62, p.3803-3816 (2000).