Enhanced Dielectric Loss via Six‐Coordinated Er Single Atoms on Porous Carbon Nanofibers for High‐Performance Electromagnetic Wave Absorption

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Abstract The metal single‐atoms (M‐SAs) have shown enhanced electromagnetic wave absorption performances. However, the relationship between their coordination number with non‐metal atoms and property is still blurry. Here, erbium (Er‐SAs) coordinated six nitrogen on one‐dimensional (1D) nitrogen‐doped hollow carbon nanofibers (HCNF‐Er) are presented for high‐performance absorption. Density functional theory (DFT) calculations experimental results reveal that Er─N 6 configuration D h symmetry significantly enhances both conduction polarization losses of HCNF support, outperforming four‐coordinated M‐SAs 4 symmetry. It also found abundant porosity increases surface area, optimizing impedance matching enhancing lightweight HCNF‐Er. Consequently, HCNF‐Er‐based film shows a wide effective bandwidth (EAB) 6.0 GHz. Furthermore, exhibits excellent flexibility, thermal insulation, mechanical strength. This study offers comprehensive optimization configurations absorption, emphasizing its potential scalable applications.

Language: Английский

Pb single-atoms on nitrogen-doped graphene hollow spheres for electromagnetic wave absorption

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120352 - 120352

Published: April 1, 2025

Language: Английский