Hits:

Indexed by:期刊论文

Date of Publication:2012-03-01

Journal:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING

Included Journals:SCIE、EI、Scopus

Volume:106

Issue:3

Page Number:589-595

ISSN No.: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.