Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3054163
Keywords
dielectric polarisation; filled polymers; nanocomposites; nickel; particle size; percolation; permittivity; tunnelling
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Funding
- CSIR (New Delhi, India )
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The effect of processing conditions and filler particle size/surface area on the dielectric behavior of polyvinyledene fluoride/nickel composites is reported. Large enhancement of low frequency dielectric constant with reduction in metal particle size in a metal-polymer composite is observed. Enhancement in the dielectric constant has been attributed to increase in interfacial area and consequent interfacial polarization with reduction in metal particle size. The increased interparticle contacts from the nearest neighbors result in enhanced tunneling probability leading to lowering of percolation threshold for nanosized nickel/polyvinyledene fluoride composites as compared to micron nickel/polyvinyledene fluoride composites.
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