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“Generating the force required to fold the sheet involved the use of something called a shape-memory composite, which can be locked into one conformation while still retaining a “memory” of a second one; given the right stimulus, the material will shift to the second shape. For this particular work, the team relied on pre-stretched polystyrene, which will change conformations when heated to 100 degrees Celsius,” according to Ars Technica.
[Via: Ars Technica / Science]
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