☆ 4.4 Article

Dielectric properties of silver nanowires-filled polyvinylidene fluoride composite with low percolation threshold

JOURNAL OF NANOPARTICLE RESEARCH (2014)

期刊

JOURNAL OF NANOPARTICLE RESEARCH

卷 16, 期 9, 页码 -

出版社

SPRINGER

DOI: 10.1007/s11051-014-2578-9

关键词

AgNWs; Synthesis; PVDF; Composites; Dielectric properties; One-dimensional nanostructure

类别

Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary

资金

National Basic Research Program of China (973 Program) [2012CB933700-G]
Guangdong Innovative Research Team Program [2011D052]
Shenzhen Peacock Planning Team [KYPT20121228160843692]
Shenzhen Electronic Packaging Materials Engineering Laboratory, 3 Dimension High Density Substrate & Packaging Technology Research and Industrialization of High Performance CPU [2011ZX02709]

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摘要

Large-scale silver nanowires (AgNWs) with a width of 50-60 nm and a typical length of 10 +/- 5 mu m were synthesized conveniently through a simple polyol reduction method, and the weight of obtained AgNWs was close to 10 g in this one-pot reaction with 500 ml of solution. The as-prepared AgNWs were incorporated into polyvinylidene fluoride matrix (PVDF) to fabricate the AgNWs/PVDF composites, and dielectric behaviors of the composites were investigated. The results revealed that a low percolation threshold of 1.8 vol% was observed in the AgNWs/PVDF composites, which was due to the large aspect ratio of one-dimension structured AgNWs. A giant dielectric constant of 80,000 at 1 kHz was obtained with 1.8 vol% of AgNWs mainly caused by the percolation effect. Besides, the large microcapacitor networks and strong interfacial polarization at percolation threshold contributed to the enhanced dielectric constant.

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