Electromagnetic-Polarization-Selective Composites with Quasi-1D Van der Waals Fillers: Nanoscale Material Functionality That Mimics Macroscopic Systems

Abstract

We report on the preparation of flexible polymer composite films with aligned metallic fillers composed of atomic chain bundles of quasi-one-dimensional (1D) van der Waals material, tantalum triselenide (TaSe3). The material functionality, embedded at the nanoscale level, is achieved by mimicking the design of an electromagnetic aperture grid antenna. The processed composites employ chemically exfoliated TaSe3 nanowires as the grid building blocks incorporated within the thin film. Filler alignment is achieved using the “blade coating” method. Measurements conducted in the X-band frequency range demonstrate that the electromagnetic transmission through such films can be varied significantly by changing the relative orientations of the quasi-1D fillers and the polarization of the electromagnetic wave. We argue that such polarization-sensitive polymer films with unique quasi-1D metallic fillers are applicable to advanced electromagnetic interference shielding in future communication systems.

Anisotropic Mechanics of 2D Materials

“…[66,67] This character endows the TMTCs feasibility to be mechanically exfoliated into 1D nanoribbon with expected atomic smooth edge. [157][158][159][160][161] It would provide a promising avenue for the construction of next-generation electronics based on nanoribbons, as the electronic structure of which can be precisely controlled benefiting from their atomic smooth edge structure.…”

Metallic vs. semiconducting properties of quasi-one-dimensional tantalum selenide van der Waals nanoribbons

“…The bulk TaSe 3−δ crystals for this study were grown by chemical vapor transport (CVT) or acquired from a commercial vendor (HQ Graphene; also, CVT grown). The details of the CVT synthesis have been reported by some of us elsewhere 18,43,44 and are not reproduced here. The in-house grown and commercial crystals selected for this study have consistent energy-dispersive X-ray spectroscopy (EDS) characteristics (see Fig.…”

A Flexible, Mechanically Strong, and Anti‐Corrosion Electromagnetic Wave Absorption Composite Film with Periodic Electroconductive Patterns

“…In recent years, flexible and stable electromagnetic (EM) responsive films that can selectively reflect, absorb, or transmit an electromagnetic wave (EMW), have been extensively developed for EM pollution, radar stealth, and other specific applications. [1][2][3][4][5][6][7] Among the various responsive films, highefficiency EMW absorption films have become more important due to less secondary pollution and better stealth performance; however, their design remains a challenge owing to impedance mismatch, insufficient attenuation, and instability at small thicknesses. [8] In extreme conditions-such as acid/alkali and it was reduced to Cu 2 S, the valence band was mainly from the 3d orbital of Cu and 3p orbital of S, while the main component of the conduction band was the 3p orbital of S. Concurrently, the bandgap increased to 2.5 eV compared to CuS (0.75 eV).…”