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Extension of the wormlike bead-rod model in square nanochannels; circle: with excluded volume interactions, x: without excluded volume interactions. Other parameters: w = 4.6nm, lp = 53nm, N = 800 beads. Dashed line: theoretical prediction of Odijk's regime Eq. (1) with no adjustable parameters. Deff/lp = 1 corresponds to a real channel dimension of D = 57.6nm.
