Fig. 5: 3D phase segregation and photochromic colloidal swarm.
From: Photochromism from wavelength-selective colloidal phase segregation
a, The illustration of spectral sensitive layered segregation in the ternary colloidal system, where different illumination spectra resulted in distinctive vertical stratification. b, The 3D distribution of ternary colloidal particles as imaged by confocal microscope after red, green and blue light illumination. The SQ2, LEG4 and L0 sensitized TiO2 colloids are represented in cyan, magenta and yellow, respectively. Scale bar, 50 μm. c, A modified projector is used to project designed colour images. d, Six colour blocks emerged on the surface of photochromic ink after 2 min of exposure. The inset shows the projected pattern. Scale bar, 2 mm. e, The university logo emerged on the surface of photochromic ink after 2 min of exposure. Scale bar, 2 mm. f, Sequential patterning of the photochromic ink with different colour paintings with 2 min exposure. The inset shows the original projected patterns. Scale bar, 2 mm.
