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Effects of the finite particle sizes on the electrostatic potential in SMPNP. Ionic strength is 150 mM and substrate bulk density is 100 mM in both PNP and SMPNP calculations. In SMPNP-1, the sizes are 3.0, 3.0, and 3.0 Å for coion, counterion, and substrate, respectively. In SMPNP-2, these values are 3.0, 5.0, and 5.0 Å; and in SMPNP-3, they are 3.0, 3.0, and 8.0 Å, respectively. The x axis is truncated at r = 4 Å in the illustration.
