(a) Representative images illustrating the influence of the orientation of the nematic director at the surfaces. Red arrows indicate motile angle of the polymeric coils with respect to the primary axis of coiled film (b) The geometry of the helix (Red filled circle, left axis) and the directionality of the locomotion (Blue filled square, right axis) are summarized as a function of offset angle of the top surface of the azo-LCNs to the primary axis of the samples. (c) Velocity of the photomotility of the azo-LCNs is plotted against the helix diameter (D) of the spiral ribbons. The azo-LCN samples were 15 μm thick. The error bars shown in (b) and (c) are the standard deviation of each parameter calculated from data measured for 15 seconds monitored at an interval of 0.5 seconds.