FIG. 3.

(a) Example images showing fluorescent DNA passing through the outlet [blue region in Fig. 1(a)] of the channel after having been trapped for a total time of $\mathrm{\Delta }t=180\min$. The DNA was suspended in buffer solution 8 and was trapped using $\mathrm{\Delta }H=0.15$ in. and ${\varphi }_m=60\mathrm{V}$ (${\nu }_0=1200\mu \mathrm{m}/\mathrm{s}$ and ${\nu }_E=50\mu \mathrm{m}/\mathrm{s}$). (b) The mean intensity $⟨I⟩(t)$ calculated from each image following the release of the trap at $t=0$. The blue circles correspond to the mean intensities from the images in (a). The subplot compares the total moles of DNA trapped (symbols) with the theoretical maximum (line) as a function of the elapsed time of trapping, $\mathrm{\Delta }t$.