Highlights Convincing candidates of flexible (stretchable/compressible) electromagnetic interference shielding nanocomposites are discussed in detail from the views of fabrication, mechanical elasticity and shielding performance. Detailed summary of the relationship between deformation of materials and electromagnetic shielding performance. The future directions and challenges in developing flexible (particularly elastic) shielding nanocomposites are highlighted. Abstract With the extensive use of electronic communication technology in integrated circuit systems and wearable devices, electromagnetic interference (EMI) has increased dramatically. The shortcomings of conventional rigid EMI shielding materials include high brittleness, poor comfort, and unsuitability for conforming and deformable applications. Hitherto, flexible (particularly elastic) nanocomposites have attracted enormous interest due to their excellent deformability. However, the current flexible shielding nanocomposites present low mechanical stability and resilience, relatively poor EMI shielding performance, and limited multifunctionality. Herein, the advances in low-dimensional EMI shielding nanomaterials-based elastomers are outlined and a selection of the most remarkable examples is discussed. And the corresponding modification strategies and deformability performance are summarized. Finally, expectations for this quickly increasing sector are discussed, as well as future challenges. 

/pdf/flexible-nanocomposite-conductors-for-electromagnetic-3w0fsvtt.pdf

Flexible Nanocomposite Conductors for Electromagnetic Interference Shielding

Herein, regulating microwave interference effect is carried in polydimethylsiloxane/carbon nanotube (PDMS/CNT) sandwiched composites via tuning dielectric and magnetic loss in middle layer to develop absorption-type microwave shielding materials. First, the sandwiched samples with different thickness of middle layer are prepared to discuss the thickness-dependent microwave interference effect. The microwave shielding performance is enhanced by thickness of middle layer due to the enhancement of the microwave interference effect. Second, the dielectric fillers or magnetic fillers are added into the middle layer to affect the microwave interference effect via dielectric or magnetic regulation, so as to tune the microwave shielding effectiveness (SE) of the composites. Third, a comparative study on absorption (A) coefficient and microwave SE is carried on the sandwiched and gradient samples. The sandwiched samples show more excellent microwave SE values and A coefficients than that of the gradient samples because of the microwave interference effect. 

Achieving Absorption-Type Microwave Shielding Performance in Polydimethylsiloxane/Carbon Nanotube Sandwiched Composites via Regulating Microwave Interference Effect

Graphene/Carbon Fiber Network Constructed by Co-carbonization Strategy for Functional Integrated Polyimide Composites with Enhanced Electromagnetic Shielding and Thermal Conductive Properties

Recent advances in non-biomass and biomass-based electromagnetic shielding materials

/pdf/constructing-interconnected-asymmetric-conductive-network-in-255t8zly.pdf

Constructing interconnected asymmetric conductive network in TPU fibrous Film: Achieving low-reflection electromagnetic interference shielding and surperior thermal conductivity

Asymmetric Electromagnetic Shielding Performance Based on Spatially Controlled Deposition of Nickel Nanoparticles on Carbon Nanotube Sponge

In-situ organic-inorganic ferroelectric layer growth for efficient perovskite solar cells with high photovoltage

We report spin–orbit torque (SOT) based on spin-torque ferromagnetic resonance (ST FMR) in a single ferrimagnetic layer. Temperature-dependent anomalous Hall resistance ([Formula: see text]) shows a magnetic compensation temperature ([Formula: see text]) of about 205 K. Temperature-dependent ST FMR is performed to quantify SOT; the torque is exerted to the total moment, and the SOT sign diverges as the temperautre approaches [Formula: see text]. X-ray photoelectron spectroscopy revealed that SOT arises due to the broken symmetry of the bulk spatial inversion along the normal direction of the film. Our finding provides useful information about the controlled temperature of bulk spin–orbit coupling in single layer GdFeCo.

Spin–orbit torque in a single ferrimagnetic GdFeCo layer near the compensation temperature

Transition metal thiophosphate, CuInP2S6 (CIPS), has recently emerged as a potentially promising material for photoelectrochemical (PEC) water splitting due to its intrinsic ferroelectric polarization for spontaneous photocarrier separation. However, the poor kinetics of the hydrogen evolution reaction (HER) greatly limits its practical applications. Herein, we report self-enhancing photocatalytic behavior of a CIPS photocathode due to chemically driven oxygen incorporation by photoassisted acid oxidation. The optimal oxygen-doped CIPS demonstrates a >1 order of magnitude enhancement in the photocurrent density compared to that of pristine CIPS. Through comprehensive spectroscopic and microscopic investigations combined with theoretical calculations, we disclose that oxygen doping will lower the Fermi level position and decrease the HER barrier, which further accelerates charge separation and improves the HER activity. This work may deliver a universal and facile strategy for improving the PEC performance of other van der Waals metal thiophosphates.

Self-Enhancing Photoelectrochemical Properties in van der Waals Ferroelectric CuInP2S6 by Photoassisted Acid Hydrolysis.

The electrical control of magnetization compensation temperature (${T}_{\mathrm{com}}$) is investigated in ferrimagnetic GdFeCo alloy deposited on ferroelectric $\mathrm{Pb}({\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}\text{\ensuremath{-}}30%\mathrm{PbTi}{\mathrm{O}}_{3}$ (PMN-PT). It is found that the applied electric field can cause a 19 K shift in ${T}_{\mathrm{com}}$. ${T}_{\mathrm{com}}$ under different applied electric fields across the PMN-PT substrate suggests that such electrical control is induced by piezostrain at the ferroelectric-ferrimagnetic interface. Spin-polarized first-principles calculations show that the change of exchange coupling strength in GdFeCo are caused by the lattice strains. Nonvolatile switching of resistance and direct bipolar control of exchange bias are achieved when an electric field is applied to appropriately designed multilayers. Our findings pave the way for electric field control of ${T}_{\mathrm{com}}$ in ferrimagnetic GdFeCo alloy and have implications for the development of energy efficient and nonvolatile ferrimagnetic magnetic random access memory. 

Piezostrain-controlled magnetization compensation temperature in ferrimagnetic GdFeCo alloy films

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