[In Press] The multiphasic teeth of Chiton articulatus : an abrasion-resistant and self-sharpening tool for hard algae collection

D. Montroni, E. Sarmiento, R. Zhao, P. S. Dasika, J. M. Connolly, Richard Wuhrer, Y. Zhang, M. Zhernenkov, T. Wang, B. P. Ramirez-Santana, Leigh Sheppard, O. H. Avila-Poveda, A. Arakaki, M. Nemoto, P. Zavattieri, D. Kisailus

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Chiton articulatus is a species of mollusk living in the tropical Pacific intertidal rocky shores of Mexico. This species feeds on solid waste organic sources, including hard crustose algae that grow on rocky substrates, by grazing on them with its radula, a flexible chitinous membrane lined with mineralized major lateral teeth. In this study, the composition, morphology, and resulting mechanics of the mature teeth of this species, which have yet to be examined, are revealed. The results show the presence of multiphasic mature teeth, each consisting of aligned hard magnetite nanoparticles on the leading edge of the tooth underneath which are magnetite lamellae, followed by goethite, lepidocrocite, and eventually hydroxyapatite near the trailing edge. This multiregional structure demonstrates a gradation in hardness as well as different microstructural features integrated with tough interfaces. The combination of these microstructural and phase arrangements results in an abrasion-resistant tough structure with a self-sharpening ability. The results of this work will help contribute to developing new bioinspired designs while also helping to understand the evolution and feeding habits of these intriguing invertebrates.
Original languageEnglish
Number of pages15
JournalAdvanced Functional Materials
DOIs
Publication statusPublished - 14 Aug 2024

Open Access - Access Right Statement

© 2024 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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