Half of a hairpin curve in a two-dimensional Cartesian coordinate system.
Line segment (i.e., chord of the hairpin) enclosed in a circular cross section.
Line segment (i.e., chord of the hairpin) enclosed in a square cross section whose two sides represent the axes of a Cartesian coordinate system. Point is restricted to the triangular region.
(a) Line segment (i.e., chord of the hairpin) enclosed in the cross section of a narrow slit. (b) One end of the segment touches the lower wall, whereas its center of mass is fixed at a distance from the wall.
Scaled length and scaled energy of the hairpin as a function of . At the hairpin is a semicircle so and .
Half length of the hairpin chord and global persistence length for DNA confined in a circular nanochannel of radius . The DNA persistence length is .
Half length of the hairpin chord and global persistence length for DNA confined in a square nanochannel with side equal to . The DNA persistence length is . These results pertain to the experiments of Reisner et al. (Ref. 13).
Global persistence length of DNA enclosed in a nanoslit as a function of the persistence length . The width of the nanoslit is and its height is [values pertaining to the experiments of Jo et al. (Ref. 22)].
Experimental elongations compared with theoretical predictions and in their respective regimes of validity. was measured directly from Fig. 4(a) in Ref. 13. The T2 DNA has a contour length of .
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