Regular-wrinkling tunable MXene lattice for electromagnetic interference shielding
Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
Protecting sensitive equipment from electromagnetic radiation damage requires the development of high-performance electromagnetic interference (EMI) shielding films. As the film thickness is reduced to micro/nano scales, EMI generally falls off rapidly due to the film’s weaker reflection. As a result, enhanced EMI shielding performance in sub-µm thin films remains an unsolved challenge. Inspired by the naturally wrinkling of fruit skin, we propose a homogeneous strain strategy to achieve self-wrinkling-induced lattice-structured MXene by uniform polymer shrinkage due to dehydration. Uniform wrinkle amplitude can be tuned from 0.8 to 6 µm, which results in additional surface scattering of electromagnetic-waves and electrical conduction paths. The obtained lattice-structured films demonstrate an excellent EMI shielding of up to 81.5 dB for a thickness of 17 µm, maintaining high EMI shielding performance and stability after enduring various harsh testing conditions. These results demonstrate the potential of wrinkling-induced, surface regular patterns for improving the EMI shielding performance of ultra-thin films based on conventional materials.