All‐In‐One Flexible MXene/PET Films via Scalable Scanning Centrifugal Casting for High Transparency and Ultra‐Wide Multispectral Electromagnetic Responses

Highly integrated multifunctional materials are crucial for the development of next-generation aircraft and electronic communication devices. In this study, a novel ultra-thin MXene film with high optical transparency and broad multispectral electromagnetic responses is first fabricated using the scanning centrifugal casting (SCC) technique. The MXene-coated PET films significantly integrate transparency, UV-adsorption, infrared (IR) stealth, and electromagnetic shielding from gigahertz (GHz) to terahertz (THz) frequencies together to address the diverse demands of multifunctional applications. The all-in-one integrated flexible films exhibit excellent optoelectronic properties (sheet resistance of 163 Ω sq^-1 at 82% transparency with a figure of merit of 10.88), outstanding IR stealth (IR emissivity below 55%), and ultra-broad electromagnetic shielding performance (shielding effectiveness of over 10 dB across GHz to THz frequencies). This remarkable performance is attributed to the intrinsic multifunctionality of MXene, ultra-thin thickness, horizontal alignment of nanosheets, and strong interfacial interactions achieved during the SCC process. These all-in-one flexible MXene films exhibit great potential for applications in aircraft windows, wearable electronics, and next-generation communication technology.