Structural Monitoring and Maintenance

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Strain sensing skin-like film using zinc oxide nanostructures grown on PDMS and reduced graphene oxide

  • Satish, Tejus (Department of Biochemistry, Rice University) ;
  • Balakrishnan, Kaushik (Department of Materials Science and Nanoengineering, Rice University) ;
  • Gullapalli, Hemtej (Department of Materials Science and Nanoengineering, Rice University) ;
  • Nagarajaiah, Satish (Department of Materials Science and Nanoengineering, Rice University) ;
  • Vajtai, Robert (Department of Materials Science and Nanoengineering, Rice University) ;
  • Ajayan, Pulickel M. (Department of Materials Science and Nanoengineering, Rice University)
  • Received : 2017.01.27
  • Accepted : 2017.05.03
  • Published : 2017.06.25
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Abstract

In this paper, we present a strain-sensitive composite skin-like film made up of piezoresistive zinc oxide (ZnO) nanorods embedded in a flexible poly(dimethylsiloxane) substrate, with added reduced graphene oxide (rGO) to facilitate connections between the nanorod clusters and increase strain sensitivity. Preparation of the composite is described in detail. Cyclic strain sensing tests are conducted. Experiments indicate that the resulting ZnO-PDMS/rGO composite film is strain-sensitive and thus capable of sensing cycling strain accurately. As such, it has the potential to be molded on to a structure (civil, mechanical, aerospace, or biological) in order to provide a strain sensing skin.

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References

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