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. 2015 Jun 18;6:7310. doi: 10.1038/ncomms8310

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(a) Dependence of translational motion on light intensity when angles of irradiation are fixed (θ_UV=θ_VIS=45°, ϕ=180°). The motion of the crystals was statistically analysed and the average velocities are plotted (see Methods for details). (b) Schematic representation showing the vertical motion of a crystal. (c–f) Optical photomicrographs of DMAB crystals moving in a vertical direction following irradiation for t=0 (c), 2.5 (d), 5 (e) and 10 min (f). The dashed lines represent the initial positions of the crystals. Irradiation conditions: θ_UV=θ_VIS=45°, ϕ=180°, intensities of UV and visible light are 200 and 60 mW cm⁻², respectively.