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Electrostatic adsorption of DNAs on PLL surface and DMSO effect. a) The filling step. b) Simulation result of electrostatic adsorption of DNAs to PLL surface. c) Molecular simulation of the DMSO effect: the radial distribution function of P atom of the phosphate group and the sodium ions. The presence of DMSO pumps sodium ions from the 2nd shell to the 1st shell (arrow). d) Schematics for DMSO effect. Green circles represent sodium ions.
