Sucker rings from the humboldt squid Dosidicus gigas : the role of nanotubule architecture on the mechanical properties
The suckers that line the arms and tentacles of squid are equipped with rigid toothed ringlike elements that increase the gripping power during prey capture and handling. The sucker rings of the Humboldt squid Dosidicus gigas, are fully proteinaceous and contain nanotubules with diameters ranging...
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| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/91626 http://hdl.handle.net/10220/18845 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The suckers that line the arms and tentacles of squid are equipped with rigid toothed ringlike
elements that increase the gripping power during prey capture and handling. The sucker
rings of the Humboldt squid Dosidicus gigas, are fully proteinaceous and contain nanotubules
with diameters ranging from 100 to 250 nm. It has been shown previously that the ensuing
porosity is a prime determinant of the local elastic modulus [A. Miserez et al., Adv. Mater. 21,
401 (2009)]. Here additional nanoindentation data are presented together with structural
analyses. The nanomechanical data support our model that the measured modulus is determined
by the local porosity. The dry moduli reach ca. 8 GPa and are reduced about two-fold in the
hydrated state. This surprisingly small reduction is discussed in relation to possible chemistries
responsible for assembly of these structures. |
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