200-100 Lennard-Jones potential

The 200-100 Lennard-Jones potential is a variant the more well known Lennard-Jones model . It has been used to study colloids.

$\Phi _{12}(r)=4\epsilon \left[\left({\frac {\sigma }{r}}\right)^{200}-\left({\frac {\sigma }{r}}\right)^{100}\right]$

where

• $r:=|\mathbf {r} _{1}-\mathbf {r} _{2}|$
• $\Phi _{12}(r)$ is the intermolecular pair potential between two particles or sites
• $\sigma$ is the diameter (length), i.e. the value of $r$ at which $\Phi _{12}(r)=0$
• $\epsilon$ is the well depth (energy)