Magnetic Graphene Aerogel

Broadband, strong absorption

Integrates CoNi nanofibers with graphene aerogel for dielectric-magnetic coupling, achieving ultra-broadband electromagnetic wave absorption and compatibility with all-dielectric metamaterial absorbers.

Jiaxuan, Zhang · Yu, Zhao · Yu, Qiao · Jie, Sui · Shuang, Li · Jiaxin, Liu · Jiayi, Guo · Jianning, Xu · Wang, Gang · Zhao, Wu · Ruiyong, Chen · Xinyu, Zhang · Yujie, Hu · Haiqing, Weng · Yun, Jiangni · Yan, Junfeng

Carbon 2026

Specifications

Effective absorption bandwidth
{'zh': '6.73', 'en': '6.73'} GHz
Minimum reflection loss
{'zh': '-54.94', 'en': '-54.94'} dB
Radar cross section reduction
{'zh': '21.7', 'en': '21.7'} dB
Effective absorption bandwidth
{'zh': '33.75', 'en': '33.75'} GHz

Advantages

Tunable loss mechanisms

By adjusting the alloy-to-graphene ratio, the relative contributions of relaxation polarization and conduction loss can be regulated, offering design freedom to optimize absorption for specific frequency bands.

Ultra-broadband absorption

A deep learning optimized double period gradient all-medium metamaterial achieves an effective absorption bandwidth of 33.75 GHz (6.25–40 GHz) with a total thickness of only 4.5 mm.

Thin and strong absorption

CoNi@rGA-4 achieves a minimum reflection loss of −54.94 dB at 9.92 GHz, enabling efficient absorption in ultra-thin coatings for weight-sensitive applications.

Validated radar stealth performance

RCS simulations show a perfect electric conductor plate coated with CoNi@rGA-4 achieves a maximum reduction of 21.7 dB, and a fully coated aircraft model also shows reduced RCS, validating practical stealth potential.

Applications