Journal
JOURNAL OF THE ROYAL SOCIETY INTERFACE
Volume 8, Issue 57, Pages 500-505Publisher
ROYAL SOC
DOI: 10.1098/rsif.2010.0413
Keywords
biomechanics; bone; atomic force microscopy; mineralized collagen fibril
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Funding
- EPSRC [EP/E039928/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E039928/1] Funding Source: researchfish
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Mineralized collagen fibrils (MCFs) are distinct building blocks for bone material and perform an important mechanical function. A novel experimental technique using combined atomic force microscopy and scanning electron microscopy is used to manipulate and measure the mechanical properties of individual MCFs from antler, which is a representative bone tissue. The recorded stress-strain response of individual MCFs under tension shows an initial linear deformation region for all fibrils, followed by inhomogeneous deformation above a critical strain. This inhomogeneous deformation is indicative of fibrils exhibiting either yield or strain hardening and suggests possible mineral compositional changes within each fibril. A phenomenological model is used to describe the fibril nano-mechanical behaviour.
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