折纸可以实现自我折叠了,至少通过一种特殊的材料可以这样做。被用于塑料杯和泡沫塑料外卖容器的聚苯乙烯在加热时会收缩,这使其成为一种理想的材料。研究人员可把彩色打印和光线相结合,将稀薄的二维塑料进行折叠,使其一步步成为复杂的三维形状。工程师在塑料上打上墨线,将不同的颜色与其吸收的彩色光相匹配。当光触碰到墨线时,下 Origami can be self-folding, at least through a special material can do so. Polystyrene, used in plastic cups and foam take-away containers, shrink when heated, making it an ideal material. Researchers can combine color printing with light to fold thin, two-dimensional plastic to make it a complex three-dimensional shape step by step. Engineers put ink on plastic, matching different colors to the colored light it absorbs. When the light touch the ink line, the next