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Autonomic restoration of electrical conductivity using polymer-stabilized carbon nanotube and graphene microcapsules

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11 Author(s)
Odom, Susan A. ; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA ; Tyler, Timothy P. ; Caruso, Mary M. ; Ritchey, Joshua A.
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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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Applied Physics Letters  (Volume:101 ,  Issue: 4 )