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Fabrication of novel Ag nanowires/poly(vinylidene fluoride) nanocomposite film with high dielectric constant
Author(s) -
Zheng Wei,
Lu Xiaofeng,
Wang Wei,
Wang Zhaojie,
Song Mingxin,
Wang Yu,
Wang Ce
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925520
Subject(s) - nanowire , materials science , dielectric , nanocomposite , composite number , volume fraction , composite material , dielectric loss , high κ dielectric , scanning electron microscope , percolation (cognitive psychology) , fluoride , percolation threshold , dispersion (optics) , nanotechnology , optoelectronics , electrical resistivity and conductivity , optics , engineering , electrical engineering , inorganic chemistry , chemistry , neuroscience , biology , physics
A nanocomposite with Ag nanowires embedded into poly(vinylidene fluoride) (PVDF) has been prepared via a simple casting method. The uniform dispersion of Ag nanowires is characterized by scanning electron microscopy and the dielectric properties of composite films on volume fraction of Ag nanowires and frequency are fully investigated. The percolation threshold of the composite is relatively large, 20 vol.%. The dielectric constant of Ag nanowires/PVDF composite film is as high as 800 in the low‐frequency range (100 Hz), and remains at 379 at 1000 Hz with 20 vol.% of Ag nanowires. Meanwhile, the Ag nanowires/PVDF composite film exhibits low dielectric loss of 0.15, which shows potential for applications in advanced electronics. Dependence of the effective dielectric constant of the Ag nanowires/PVDF composites on the Ag nanowires volume fraction at room temperature and 1000 Hz. And the inset is the surface of the composite film ( f Ag = 20 vol.%).