Nanointerfacial strength between non-collagenous protein and collagen fibrils in antler bone

Journal article


Hang, F, Gupta, HS and Barber, AH (2013). Nanointerfacial strength between non-collagenous protein and collagen fibrils in antler bone. Journal of The Royal Society Interface. 11 (92), pp. 20130993-20130993. https://doi.org/10.1098/rsif.2013.0993
AuthorsHang, F, Gupta, HS and Barber, AH
Abstract

Antler bone displays considerable toughness through the use of a complex nanofibrous structure of mineralized collagen fibrils (MCFs) bound together by non-collagenous proteins (NCPs). While the NCP regions represent a small volume fraction relative to the MCFs, significant surface area is evolved upon failure of the nanointerfaces formed at NCP–collagen fibril boundaries. The mechanical properties of nanointerfaces between the MCFs are investigated directly in this work using an in situ atomic force microscopy technique to pull out individual fibrils from the NCP. Results show that the NCP–fibril interfaces in antler bone are weak, which highlights the propensity for interface failure at the nanoscale in antler bone and extensive fibril pullout observed at antler fracture surfaces. The adhesion between fibrils and NCP is additionally suggested as being rate dependent, with increasing interfacial strength and fracture energy observed when pullout velocity decreases.

KeywordsMD Multidisciplinary; General Science & Technology
Year2013
JournalJournal of The Royal Society Interface
Journal citation11 (92), pp. 20130993-20130993
ISSN1742-5689
Digital Object Identifier (DOI)https://doi.org/10.1098/rsif.2013.0993
Publication dates
Print18 Dec 2013
Publication process dates
Deposited20 Aug 2018
Accepted18 Dec 2013
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