A self-assembled spongelike (S) ultralight (ρ ≈ 140 mg cm⁻³) aerogel was fabricated through polypyrrole (PPy) and reduced graphene oxide (RGO).

A kind of pollution known as electromagnetic interference (EMI), which results from ubiquitous usage of various electronic communication and military radar equipment, has been receiving increasing attention recently. However, large-area EMI shielding on transparent and/or curved surfaces, including building windows, curved glass wall, and special requirements spaces (SRSs), remains hard to achieve. In this paper, a silver nanofiber (AgNF) based flexible and transparent EMI shielding film was successfully assembled via a room-temperature roll-to-roll production method. For transparent application scenario, AgNF with 89% transmittance in visible range and 1 μm thickness shows ~20 dB shielding efficiency (EMI SE). On the other hand, total shielding (>50 dB) is obtained when the thickness of AgNF increases to 10 μm, while its transmittance in visible range remains higher than 75%. Considering the facile and scale-free production technology, this material can be readily applied in large-scale, transparent, and/or SRSs EMI shielding.

First report on the excellent electromagnetic absorption and electromagnetic interference shielding performances of helical conducting polymer nano-structures.

Graphene oxide and zinc oxide nanoparticles have formed a three-dimensional nanocomposite with a high performance of electromagnetic absorption via a hydrothermal process. UV-irradiation removed the remaining oxygen functional groups from the skeleton of the reduced graphene oxide.

Charge-transfer based molecular conductors have attracted great attention in recent years, but have been rarely explored in the field of electromagnetic materials. In this work, a nanostructural tetrathiofulvlene-7,7,8,8-tetracyanoquinodimethane (TTF–TCNQ) complex, an organic charge-transfer system, was prepared via a solution mixing route. The electromagnetic response behavior of the TTF–TCNQ complex was systematically investigated. The results indicate that the TTF–TCNQ complex shows good electromagnetic absorption (EMA) performance with a filler-loading ratio of 30 wt% in the matrix, where its effective EMA bandwidth can be tuned in the frequency range of 7.1–16.6 GHz. Moreover, the TTF–TCNQ complex exhibits excellent electromagnetic interference shielding performance in the X-band when the filler-loading ratio increases to 45 wt%. A model involving an electronic structure, multi-polarization, and a conductive network is used to explain the electromagnetic response behavior of the TTF–TCNQ complex. This research opens up the exploration of organic charge-transfer systems in the field of electromagnetic materials, and significantly broadens the application scope of charge-transfer materials.