We report the use of microcapsules containing suspensions of polymer-stabilized carbon nanotubes and/or graphene flakes for the autonomic restoration of conductivity in fractured gold lines. Multilayered samples were prepared in which microcapsules were embedded in layers of epoxy above and below a glass slide patterned with gold lines. Upon sample fracture, conductivity was lost as a crack formed in the gold line. Simultaneous release of carbon nanotubes and/or graphene suspensions from capsule cores restored conductivity in minutes. We suggest a healing mechanism in which the released carbon nanomaterials bridge gaps in the gold lines.
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See supplementary material at http://dx.doi.org/10.1063/1.4737935 for details on our microcapsule fabrication and characterization, four-point bend sample fabrication, and testing including the Wheatstone bridge setup, thermogravimetric analysis, AFM images, and additional optical microscope images and diagrams.
© 2012 American Institute of Physics.
2012
American Institute of Physics
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