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SEM images of cross-sections parallel to the freezing direction for constructs after freezing, annealing for 24 h at 34 °C, and sublimation of the camphene. The freezing step was performed on a constant-temperature substrate (3 °C) (A1–A3) or at a constant freezing rate of 7 °C/min (B1–B3). Images are shown for the bottom, middle, and top portions of the constructs along the freezing direction.
