Direct quantification of the mechanical anisotropy and fracture of an individual exoskeleton layer via uniaxial compression of micropillars.

@article{Han2011DirectQO,
  title={Direct quantification of the mechanical anisotropy and fracture of an individual exoskeleton layer via uniaxial compression of micropillars.},
  author={Lin Han and Lifeng Wang and Juha Song and Mary C. Boyce and Christine Ortiz},
  journal={Nano letters},
  year={2011},
  volume={11 9},
  pages={
          3868-74
        }
}
A common feature of the outer layer of protective biological exoskeletons is structural anisotropy. Here, we directly quantify the mechanical anisotropy and fracture of an individual material layer of a hydroxyapatite-based nanocomposite exoskeleton, the outmost ganoine of Polypterus senegalus scale. Uniaxial compression was conducted on cylindrical micropillars of ganoine fabricated via focused ion beam at different orientations relative to the hydroxyapatite rod long axis (θ = 0°, 45°, 90… CONTINUE READING

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