Fig. 5.
EMI shielding performance of the flexible Cu mesh films. a Total EMI SE of the Cu meshes (Coverage ratio = 17.4%) with different thicknesses in the X-band (8.2–12.4 GHz). b Total EMI SE of Cu mesh (2.5 μm) with different coverage ratios in the X-band. c Average reflection (SER), absorption (SEA), and total EMI SE (SET) of the films with different coverage ratios. d Contributions of SER and SEA to SET for a 2.5 μm and 18.6% coverage ratio Cu mesh film. e Total EMI SE of Cu mesh at initial state and after 1000 bending cycles at the radius of 4 mm. Insets are the schematic diagrams of bending. f Comparison of the EMI SE and transmittance of this work with other materials in the literature. The details are listed in Table S4. Demonstration for shielding wireless communication electromagnetic waves. g Standby mode of two watches. h Dialing state of two watches when A was calling to B. i State of two watches when A was dialing to B which was placed in an aluminum box with an opening window. j State of two watches when A was dialing to B when the Cu mesh film was tightly attached to the opening window