Year: 2022
Type: article
Abstract: The availability of MXenes and other two-dimensional conductive nanomaterials with tunable surface chemistry has reshaped the field of electromagnetic protection. However, the high electrical conductivity and low dielectric loss of titanium-based MXenes lead to strong reflection of electromagnetic waves, even when combined with polymers to form composites. Here, we report on the ability of vanadium-based MXenes to provide broadband microwave absorption. Polyurethane composites with ∼2 wt % Vn+1CnTx can absorb 90% of electromagnetic waves covering the entire X band. In addition, pure Vn+1CnTx films of submicrometer thickness can provide effective electromagnetic interference shielding. The free electron transport, surface terminations, native defects, and layers arrangement in composites have profound effects on electronic and dielectric properties of Vn+1CnTx MXenes. This study points toward a new frontier for development of thin and highly absorbing MXene-based electromagnetic protection materials.
Source: Cell Reports Physical Science
Institutions: Drexel University, University of Pennsylvania
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,200
Awards: G1388141832, Electromagnetic Shields Based on MXene Nano-Metamaterials, COMPOSITIONAL CONTROL OF FUNDAMENTAL ELECTRONIC AND MAGNETIC PROPERTIES OF ORDERED LAYERED MULTIELEMENTAL MXENES, COMPOSITIONAL CONTROL OF FUNDAMENTAL ELECTRONIC AND MAGNETIC PROPERTIES OF ORDERED LAYERED MULTIELEMENTAL MXENES, G855231814
OpenAlex ID: W4297374011