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Single Negative Metamaterials in Unstructured Polymer Nanocomposites Toward Selectable and Controllable Negative Permittivity
Author(s) -
Li Bin,
Sui Gang,
Zhong WeiHong
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200900653
Subject(s) - materials science , permittivity , nanocomposite , metamaterial , polyetherimide , carbon nanofiber , composite material , microstructure , relative permittivity , polymer , dielectric , optoelectronics , carbon nanotube
Negative permittivity is realized in unstructured imide polymer/carbon nanofiber (CNF) nanocomposites. The microstructure of CNFs is one of the factors that exert profound effects on the permittivity. Compared with cup‐stacked CNFs‐filled polyetherimide nanocomposites, the negative permittivity in the herringbone CNFs‐filled nanocomposites is inhibited, occurring only at the frequencies near resonance, where the permittivity dips slightly into the negative region.