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The liquid crystalline elastomer structures printed by Devin Roach of the OSU College of Engineering and collaborators can crawl, fold and snap directly after printing.

The patch is made of a silicone elastomer that houses an array of small piezoelectric transducers sandwiched between stretchable copper electrodes.

The patch, roughly the size of a postage stamp, is constructed from a silicone elastomer embedded with several layers of stretchy electronics.

The use of elastomers over hydrogels -- the material used in state-of-the-art approaches -- has the added advantage of creating structures that are water-free, making them more stable over time.

The first-of-its-kind metafluid uses a suspension of small, elastomer spheres -- between 50 to 500 microns -- that buckle under pressure, radically changing the characteristics of the fluid.