Growing 3D ZnO nano-crystals on 1D SiC nanowires: enhancement of dielectric properties and excellent electromagnetic absorption performance

Abstract

Nowadays, only by balancing the relationship of electromagnetic applications and electromagnetic pollution management can human health and quality of life be guaranteed. SiC nanowires have long-term thermodynamic stability and they are widely used in special applications. However, their poor dielectric properties hindered the improvement of electromagnetic absorption (EA) performance. Light weight and high efficiency are two key factors for EA materials. In this study ZnO nano-crystals were grown on SiC nanowires through an easy scale-up double hydrolysis reaction method. With significant increments in complex permittivity, a composite loaded with 30 wt% of as-prepared sample can achieve an effective EA bandwidth (≤−10 dB) of 6.60 GHz at the thickness of 2.5 mm (11.08–17.68 GHz). The outstanding properties of the as-prepared sample imply that it is a promising nano-material in the world of EA.