Nickel nanochain composite: An improved terahertz shielding material

摘要

Terahertz (THz) shielding effectiveness (SE) of nickel nanochains (NiNC), multiwalled carbon nanotubes (MWNT) and their composites in poly-vinyl alcohol have been studied in the frequency range of 0.4¿¿¿1.8 THz at room temperature. NiNC of diameter ¿¿¿ 300 nm and length ¿¿¿ 4 ¿¿m are synthesized by reducing nickel chloride salt with hydrazine hydrate in ethylene glycol medium. NiNC and MWNT+NiNC composites show 130% and 260% increased SE at 1 THz than MWNT composites, respectively. Such a large increment in SE depicts that NiNC can easily replace the universally known MWNT composites as cost effective materials with higher shielding efficiency for the applications in THz shielding devices.