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Advanced mechanical metamaterials with unusual thermal expansion properties represent an area of growing interest, due to their promising potential for use in a broad range of areas. In spite of previous work on metamaterials with large or ultralow coefficient of thermal expansion (CTE), achieving a broad range of CTE values with access to large thermally induced dimensional changes in structures...
In article number 2004919, John A. Rogers, Yihui Zhang, and co‐workers present design concepts and fabrication strategies for a kirigami‐inspired class of 2D hierarchical metamaterials. At large filling ratios (>50%), these systems offer not only unprecedented biaxial CTE (i.e., −5950 and 10710 ppm K−1), but also large biaxial thermal expansion properties (>21% for 20 K temperature increase),...
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