Extended Data Fig. 6: Micro-LED crosslinking of films.
From: Structural colour using organized microfibrillation in glassy polymer films
a, b, The image to be printed is turned into to a two-tone image with Floyd–Steinberg dithering using GIMP software (https://www.gimp.org/) (b). c, The image is then converted to a CAD file using Tanner L-Edit IC Layout software (Mentor Graphics, https://www.mentor.com/tannereda/l-edit). The micro-LED system can control the on/off state of an array (1,024 × 768) of 1 μm × 1 μm light sources, which produce a single frame. The dashed grids in c indicate how such composite images are divided into individual frames. d, An SEM image shows the structure and boundary of a pixel formed in 35-kDa PS/PQ through micro-LED illumination. Scale bar, 1 μm. e, The image resolution is calculated from the printed stripes (light blue) in 35-kDa PS/PQ, which are 1.8 μm wide, corresponding to 14,000 dots per inch. The average linewidths were calculated by first converting the image to a binary image, where the light blue and dark blue were mapped to white and black respectively. The average width of the patterned lines is then calculated as the total area of the white pixels divided by the height of the image and total number of lines. Scale bar, 10 μm.
