Figure 7: An interactive colour-changing and tactile-sensing e-skin.

Sequential images of a teddy bear show the expression of tactile sensing into visible colour changes. In specific, the original colour of the ECD is changed from dark red to blue grey upon a weak applied pressure (∼50 kPa), reverts back to dark red upon pressure release and changes to pale blue upon a strong applied pressure (∼200 kPa; left to right images). The number at the bottom right corner of each image indicates the elapsed time.