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Issue 20, 2014
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Conductive sol–gel films

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Abstract

We report that silver nanowires (AgNW) entrapped in a series of sol–gel thin films – zirconia, alumina, titania and silica – provide conductive, highly flexible, highly adhesive, transparent thin films with excellent thermal and electrical stability. These films were subjected to intensive study and characterization including resistance, percolation analysis, critical bending angle analysis, critical thermal stability, transparency, and more. Remarkably, when resistance is kept constant, all of the studied parameters follow the same order – either increasing or decreasing – of ZrO2, SiO2, Al2O3, and TiO2. A detailed interpretation, based on the particle-sizes of the elementary sol–gel building blocks, is provided. In particular we found that the AgNWs re-enforce the ceramic matrices, thus providing excellent electroconductive stability with low silver concentration and high degree of homogeneity of the dopant distribution. Having in mind that current materials for films with these properties are often accompanied by disadvantages (such as brittleness, scarcity and poor adhesion) we offer the new conductive films as an interesting alternative to be considered.

Graphical abstract: Conductive sol–gel films

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Publication details

The article was received on 12 Dec 2013, accepted on 20 Feb 2014 and first published on 01 Apr 2014


Article type: Paper
DOI: 10.1039/C3TC32462A
Citation: J. Mater. Chem. C, 2014,2, 3914-3920
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    Conductive sol–gel films

    V. V. Vinogradov, A. Agafonov and D. Avnir, J. Mater. Chem. C, 2014, 2, 3914
    DOI: 10.1039/C3TC32462A

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