412569.fig.002
Figure 2: The solution 𝜓 ( 𝑢 ) = l n ( ( d n ( 𝑢 , 𝑘 ) + 𝑘 ) / ( d n ( 𝑢 , 𝑘 ) 𝑘 ) ) for the Poisson Boltzmann equation. The parameters are 𝑘 2 = 0 . 7 5 and 𝐾 = 2 . 1 5 6 .