A closed form for the electrostatic interaction between two rod-like charged objects

Abstract

We have calculated the electrostatic interaction between two rod-like charged objects with arbitrary orientations in three dimensions. we obtained a closed form formula expressing the interaction energy in terms of the separation distance between the centers of the two rod-like objects, $r$, their lengths (denoted by $2l_1$ and $2l_2$), and their relative orientations (indicated by $\theta$ and $\varphi$). When the objects have the same length ($2l_1=2l_2=l$), for particular values of separations, i.e for $r\le 0.8l$, two types of minimum are appeared in the interaction energy with respect to $\theta$. By employing the closed form formula and introducing a scaled temperature $t$, we have also studied the thermodynamic properties of a one dimensional system of rod-like charged objects. For different separation distances, the dependence of the specific heat of the system to the scaled temperature has been studied. It is found that for $r<0.8l$, the specific heat has a maximum.

10 pages, 9 figures, 1 table, Accepted by J. Phys.: Condens. Matter

References in corpus (1)

• Orientational Ordering and Dynamics of Rodlike Polyelectrolytes

Cited by in corpus (1)

• Generalized Onsager theory for strongly anisometric patchy colloids