期刊
ACS NANO
卷 5, 期 3, 页码 1623-1629出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn103097q
关键词
nanocomposite; broad-spectrum permittivity enhancement; metal nanoparticles; uniform spatial arrangement
类别
资金
- German BMBF [FKZ 03X5511, FKZ 03X5517A]
A new strategy for the synthesis of high permittivity polymer composites is demonstrated based on well-defined spatial distribution of ultralow amounts of conductive nanoparticles. The spatial distribution Was realized by immobilizing Cu nanoparticles within the pore system of Alia microspheres, preventing direct contact between individual Cu particles. Both Cu-loaded and unloaded silica microspheres were-then used as fillers in polymer composites prepared with thermoplastic SEBS rubber is the matrix. With a metallic Cu content of about 0.26 vol % In the compoilte, a relative increase of 94% In real permittivity was obtained. No Cu-induced relaxations were observed in the dielectric spectrum within the studied frequency range of 0.1 Hz to 1 MHz. When related to the amount of conductive nanoparticles, the obtained composites achieve the highest broad spectrum enhancement of permittivity ever reported for a polymer based composite.
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