RAPIDLY CONVERGENT SERIES FOR THE COMPUTATION OF THE INTERACTION BETWEEN DISSIMILAR PLANE PARALLEL DOUBLE-LAYER (y0 > 0 > yd ≥ -y0)

Several rapidly-convergent series for the computation of the interaction energy between dissimilar plane parallel double layers (y0 > 0 > yd ≥ -y0) are derived by expanding the interaction energy in the power series of ω0[ω0 < tanh(y0/64)]. The series terms required to obtain the interaction energy with six significant figures do not exceed 1 when the dimensionless surface potential of colloid particles y0 is less than or equal to 2.00000 × 10. The results of Devereux and de Bruyn are discovered to be incorrect when the integration constant C and absolute value of the surface potential is larger or the integration constant C is smaller.