Fig. 2 | Nature Communications

Fig. 2

From: Rainbow peacock spiders inspire miniature super-iridescent optics

Fig. 2

Optical and electron micrographs for the abdominal scales of M. robinsoni and M. chrysomelas. a, b Optical micrographs of the abdominal scales of M. robinsoni (a) and M. chrysomelas (b), showing two types of scales, iridescent and black. c, d SEM micrographs for the abdominal scales of M. robinsoni (c) and M. chrysomelas (d). At the centre of the image are the iridescent scales (white arrowhead). Black scales can be seen on both sides of the image (black arrowhead). The stems (white arrows) and the sockets (white circles) of detached scales can be observed. eh Zoom-in views of SEM micrographs of the iridescent scales of M. robinsoni (e, g) and M. chrysomelas (f, h) showing grating structures. The grating period for the iridescent scales of M. robinsoni is more regular than that of M. chrysomelas. i, j TEM micrographs revealing the airfoil-shaped profiles and the surface nanogratings in the iridescent scales of M. robinsoni (i) and M. chrysomelas (j). Scale bar: a, b 200 μm; c, d 20 μm; ej 5 μm