Ag nanoshell-induced dual-frequency electromagnetic wave absorption of Ni nanoparticles

Chung Che Lee, Dong Hwang Chen

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

The electromagnetic wave absorption properties of the epoxy resin composites containing Ni, Ag, and Ni-Ag core-shell nanoparticles were studied. Interestingly, Ni-Ag core-shell nanoparticles showed a dual-frequency absorption property in 2-18 and 18-40 GHz, although Ni nanoparticles exhibited absorption only in 18-40 GHz and no absorption was observed for Ag nanoparticles in the whole frequency range. The additional absorption of Ni-Ag core-shell nanoparticles in 2-18 GHz might be due to the lags of polarization between the core/shell interfaces, which contributed to the dielectric loss. The frequency dependences of permittivity and permeability and the absorber thickness effect were also investigated.

Original languageEnglish
Article number193102
JournalApplied Physics Letters
Volume90
Issue number19
DOIs
Publication statusPublished - 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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