Scalable self-supported FeNi3/Mo2C flexible paper for enhanced electromagnetic wave absorption evaluated via coaxial, waveguide and arch methods
Scalable and low cost fabrication of light weight flexible electromagnetic (EM) wave absorbers is highly desirable for the rapid development of wearable electronic devices. A simple method has been provided involving incorporating rationally designed FeNi3/Mo2C into cellulose fibers in the formation of thin and flexible absorbing papers with tunable electromagnetic parameters. High-performance absorption has been achieved with the minimum reflection loss (RL) reaching -51.50 dB at 13.7 GHz and effective absorption bandwidth of 5.1 GHz with a thickness of 2.0 mm due to synergic effects of dielectric and magnetic loss. For the emerging flexible absorbers, accurate electromagnetic measurements with conventional coaxial method is challenging without the addition of wax or paraffin as the solidification agent. A stacking and compressing method has been developed to prepare the standard-sized core samples for coaxial measurements for which the validity has been confirmed by comparisons with the waveguide and arch method. Consequently, not only a new type of effective EM absorber has been developed and verified by all the available measurement methods, the simple and scalable method provided to fabricate flexible electronic devices is also extendable for applications in sensing, catalysis and energy storage.
- This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers