Fig. 4: OM images of (a) a BCP film containing no ionic liquid on PDMS, (b) a BCP film containing no ionic liquid embedded in PDMS and (c) a BCP film containing ionic liquid embedded in PDMS and the film stretched with a strain of 100% (left) and released to a strain of 0% (right). | NPG Asia Materials

Fig. 4: OM images of (a) a BCP film containing no ionic liquid on PDMS, (b) a BCP film containing no ionic liquid embedded in PDMS and (c) a BCP film containing ionic liquid embedded in PDMS and the film stretched with a strain of 100% (left) and released to a strain of 0% (right).

From: Block copolymer structural color strain sensor

Fig. 4

All of the scale bars in the OM images represent 100 μm. SEM images of (d) the in-plane, (inset) inclined, and (e) cross-sectional views of a BCP film containing ionic liquid embedded in PDMS after a 100% stretching and release cycle. The characteristic micron-scale buckled structure that developed both parallel and perpendicular to the stretching direction is shown. f TM-AFM image in height contrast of a BCP SC film before stretching. The screw dislocations that act as channels for transporting the ionic liquid into the QP2VP domains are apparent

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