Assembled micro-nano particles with multiple interface polarizations for electromagnetic absorption at gigahertz

作者：Zhang X F^*; Guo J J; Qin G W

来源：Applied Physics Letters, 2014, 104(25): 252404.

DOI：10.1063/1.4885094

The usually utilized electromagnetic absorbers are fabricated by randomly dispersed fillers in polymer matrix, which limit the construction of multiple interfaces, thus influencing the optimization of absorption efficiency. In this Letter, the core/shell heterogeneous nanocapsules are chemically modified and subsequently conjugated on the micrometre-scale polymer units, forming a micro/nano-hybrided absorbent. Such a system creates multiple interfaces at sub-nanoscale, thus producing enhanced dielectric loss phenomena and resulting in an absorption efficiency of more than 90% over 2-18 GHz. The present study provides an effective concept to optimize the electromagnetic coupling and has important implications in the development of electromagnetic absorption materials.

• 出版日期2014-6-23
• 单位东北大学