Synthesis of hollow Cu_1.8S nano-cubes for electromagnetic interference shielding

Abstract

The applications of inorganic semiconductor nano-structures as electromagnetic interference (EMI) shielding materials have been scarcely researched. Herein, we have designed hollow CuS nano-cubes via a mild anion exchange and etching process. These 30 wt% hollow CuS nano-cubes loaded in wax can display 30 dB of EMI shielding effectiveness (SE) in the whole tested frequency range of 2-18 GHz with a sample thickness of only 1 mm. This good EMI shielding performance can be attributed to the high electric conductivity, which leads to a high dielectric constant. This research opens up the possibility for the applications of inorganic semiconductor nano-structures as lightweight EMI shielding materials, especially in the areas of aerospace, automobile and sophisticated electronics.

Unusual Na+ Ion Intercalation/Deintercalation in Metal-Rich Cu1.8S for Na-Ion Batteries

“…Among them, Cu 1.8 S, one of the Cu-rich sulfides ( x > 1.5), is considered as a promising candidate for the following reasons. First, chalcocite (Cu 2 S), djurleite (Cu 1.94 S), digenite (Cu 1.8 S), , and anilite (Cu 1.75 S) were experimentally proven to be stable compounds from their crystallographic studies, refinement analyses, electrochemical experiment, etc ., which could well serve as the active materials for NIBs. Second, they have narrow band gaps in the range of 1.1–1.5 eV as a p-type semiconductor.…”

A microstructure-driven magnetic composite for excellent microwave absorption in extended Ku-band

“…8–11 Among many promising architectures, hollow nanoparticles are of considerable interest to scientists due to the fascinating chemical and physical properties that they offer in a wide range of applications. 2,12–16 Generally, hollow nanoparticles have a density lower than that of their solid counterparts, which ensures that under identical volume conditions they exhibit lightweight characteristics. Also, hollow nanoparticles have large surface areas and abundant dipoles, which contribute to an increase in dielectric loss property.…”

A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor

“…Compared with EM absorbing materials, the performance of shielding materials is contributed not only by effective absorption but by reflection [39][40][41][42][43]. The robust reflection caused by remarkable electrical property enables them to be integrated into contact lenses and clothing to protect life from EM radiation [44,45].…”