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Keywords:

  • single-crystal;
  • rubrene;
  • wrinkling;
  • elastic constant;
  • modulus
Thumbnail image of graphical abstract

The intrinsic mechanical properties of rubrene single crystals are investigated. The in-plane elastic constants are obtained by inducing the wrinkling instability in crystals laminated on elastomeric substrates. The results demonstrate a dependence of wrinkling wavelength on crystallographic direction. The observed elastic anisotropy suggests a non-linear coupling between mechanical and electrical properties.