Modulation of Mechanical Interactions by Local Piezoelectric Effects

Brown, Cameron P. and Boyd, Jennifer L. and Palmer, Antony J. and Phillips, Mick and Couture, Charles-Andre and Rivard, Maxime and Hulley, Philippa A. and Price, Andrew J. and Ruediger, Andreas and Légaré, Francois and Carr, Andrew J. (2016) Modulation of Mechanical Interactions by Local Piezoelectric Effects. Advanced Functional Materials, 26 (42). pp. 7662-7667. ISSN 1616-3028

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Piezoelectricity is a well-established property of biological materials, yet its functional role has remained unclear. Here, a mechanical effect of piezoelectric domains resulting from collagen fibril organisation is demonstrated, and its role in tissue function and application to material design is described. Using a combination of scanning probe and nonlinear optical microscopy, a hierarchical structuring of piezoelectric domains in collagen-rich tissues is observed, and their mechanical effects are explored in silico. Local electrostatic attraction and repulsion due to shear piezoelectricity in these domains modulate fibril interactions from the tens of nanometre (single fibril interactions) to the tens of micron (fibre interactions) level, analogous to modulated friction effects. The manipulation of domain size and organisation thus provides a capacity to tune energy storage, dissipation, stiffness, and damage resistance.

Item Type: Journal Article
Additional Information: A copy of this paper can be found in Oxford University's Research Archive at:
Keywords: piezoelectricity, collagen, friction, biomimicry, mechanics
Faculty: ARCHIVED Faculty of Science & Technology (until September 2018)
Depositing User: Ian Walker
Date Deposited: 16 Feb 2018 10:55
Last Modified: 03 Feb 2022 09:49

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