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T. Das Gupta, T. Gacoin and A. C. H. Rowe Piezoresistive Properties of Ag/Silica Nano-Composite Thin Films Close to the Percolation Threshold Advanced Functional Materials 24

Article first published online: 14 APR 2014 | DOI: 10.1002/adfm.201303775

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The piezoresistance of sol–gel composite coatings with a tunable silver nanoparticle volume fraction is investigated. While the gage factor sharply peaks at the percolation threshold (φ*), so too do the intrinsic resistance fluctuations. By defining a figure-of-merit to account for this, it is shown that conductive composite sensors should be used slightly to the metallic side of φ*.

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