Fig. 4: Electromechanical reconfigurations of synthetic nano-kirigami.
From: Synthetic nano-kirigami with high deformability for reconfigurable information displays
a Schematic of a suspended 2D array (voltage off) and its downward deformed 3D state by electrostatic forces (voltage on). b Top-view SEM images of the fabricated flat structures with different spiral angles and same period of 2.2 μm. c, d Comparison of electromechanical modulation contrast (defined as |\(\Delta {{{\rm{R}}}}/{{{\rm{R}}}}\) | ) of the reflected signals in normal direction in the structures of θ = 240° and 270°. \(\Delta {{{\rm{R}}}}\) represents the reflection difference between the structural arrays with and without the applied DC voltages. e Modulation contrast versus spiral angle at the applied voltages of 15 V and 36 V, respectively. f Required voltage versus spiral angle at the modulation contrasts of 8% and 35%, respectively. More testing results are shown in Supplementary Fig. 10.
