File Name : figure_si_1_channeldimesions.eps

Caption : supplemental figure 1 the periodicity of the zigzag-channel is <i>l</i>=20 µm with amplitudes <i>a<sub>wide</sub></i> =20 µm and <i>a<sub>narrow</sub></i>  = 10 µm. in total are 16 periods but only the first wide and narrow section of the oscillation of the first period is used.