Self‐Assembled Woven Ag‐Nanowire 3D Network Film for Ultrathin, Transparent, and Flexible Surface Electromagnetic Interference Shielding

Abstract

A kind of pollution known as electromagnetic interference (EMI), which results from ubiquitous usage of various electronic communication and military radar equipment, has received increasing attention recently. However, it is still a big challenge to obtain good EMI shielding in transparent and/or curved surfaces. In this paper, a light, ultrathin, transparent, and flexible EMI shielding film based on woven silver nanowire (Ag‐NW) 3D networks is successfully prepared via a room‐temperature template production method. For transparent application scenario, Ag‐NWs with 91% transmittance in visible range show ≈27 dB shielding efficiency. This sample shows ≈27 dB shielding efficiency, although with a low density of Ag‐NWs (≈0.0168 mg cm−2), which implies that this material has a cost‐effectiveness. Moreover, total shielding as high as ≈40 dB is obtained by using thickened Ag‐NW grids. The EMI has not changed remarkedly after bended 1200 times, which indicates the as‐prepared flexible film has a relative stability of the EMI performance. Considering the facile production technology, this material can be readily applied in transparent EMI shielding.