Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-03-01

Journal: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING

Included Journals: Scopus、EI、SCIE

Volume: 106

Issue: 3

Page Number: 589-595

ISSN: 0947-8396

Abstract: gamma-iron and gamma-iron/graphite nanoparticles were synthesized by a non-equilibrium cooling arc-discharge method. Experimental extinction spectra exhibit unexpected dielectric resonance of gamma-iron nanoparticles at the microwave frequency, presenting the first metallic nanostructure of the high-dielectric loss. We further construct a multi-dielectric loss structure, with the enhanced dielectric loss factor of 0.7-0.9, by encapsulating the gamma-iron into onion-like graphite nanoshells.