Highly conductive, printable and stretchable composite films of carbon nanotubes and silver

Kyoung Yong Chun, Youngseok Oh, Jonghyun Rho, Jong Hyun Ahn, Young Jin Kim, Hyouk Ryeol Choi, Seunghyun Baik

Research output: Contribution to journalArticle

574 Citations (Scopus)

Abstract

Conductive films that are both stretchable and flexible could have applications in electronic devices1,2, sensors3,4, actuators5 and speakers6. A substantial amount of research has been carried out on conductive polymer composites7, metal electrode-integrated rubber substrates8-10 and materials based on carbon nanotubes and graphene1,2,11-13. Here we present highly conductive, printable and stretchable hybrid composites composed of micrometre-sized silver flakes and multiwalled carbon nanotubes decorated with self-assembled silver nanoparticles. The nanotubes were used as one-dimensional, flexible and conductive scaffolds to construct effective electrical networks among the silver flakes. The nanocomposites, which included polyvinylidenefluoride copolymer, were created with a hot-rolling technique, and the maximum conductivities of the hybrid silver-nanotube composites were 5,710 S cm-1 at 0% strain and 20 S cm -1 at 140% strain, at which point the film ruptured. Three-dimensional percolation theory reveals that Poisson's ratio for the composite is a key parameter in determining how the conductivity changes upon stretching.

Original languageEnglish
Pages (from-to)853-857
Number of pages5
JournalNature Nanotechnology
Volume5
Issue number12
DOIs
Publication statusPublished - 2010 Dec

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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