Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness
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In: Science Advances, Vol. 8.2022, No. 48, eadd4644, 02.12.2022.
Research output: Contribution to journal › Article › Research › peer-review
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T1 - Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness
AU - Oh, Sang Ho
AU - Kim, Jin-Kyung
AU - Liu, Yue
AU - Wurmshuber, Michael
AU - Peng, Xiang-Long
AU - Seo, Jinsol
AU - Jeong, Jiwon
AU - Wang, Zhen
AU - Wilmers, Jana
AU - Soyarslan, Celal
AU - Kim, Jongil
AU - Kittiwirayanon, Boonsita
AU - Jeong, Jeehun
AU - Kim, Hyo-Jeong
AU - Huh, Yang Hoon
AU - Kiener, Daniel
AU - Bargmann, Swantje
AU - Gao, Huajian
N1 - Publisher Copyright: Copyright © 2022 The Authors.
PY - 2022/12/2
Y1 - 2022/12/2
N2 - Materials displaying negative Poisson’s ratio, referred to as auxeticity, have been found in nature and created in engineering through various structural mechanisms. However, uniting auxeticity with high strength and high stiffness has been challenging. Here, combining in situ nanomechanical testing with microstructure-based modeling, we show that the leading part of limpet teeth successfully achieves this combination of properties through a unique microstructure consisting of an amorphous hydrated silica matrix embedded with bundles of single-crystal iron oxide hydroxide nanorods arranged in a pseudo-cholesteric pattern. During deformation, this microstructure allows local coordinated displacement and rotation of the nanorods, enabling auxetic behavior while maintaining one of the highest strengths among natural materials. These findings lay a foundation for designing biomimetic auxetic materials with extreme strength and high stiffness.
AB - Materials displaying negative Poisson’s ratio, referred to as auxeticity, have been found in nature and created in engineering through various structural mechanisms. However, uniting auxeticity with high strength and high stiffness has been challenging. Here, combining in situ nanomechanical testing with microstructure-based modeling, we show that the leading part of limpet teeth successfully achieves this combination of properties through a unique microstructure consisting of an amorphous hydrated silica matrix embedded with bundles of single-crystal iron oxide hydroxide nanorods arranged in a pseudo-cholesteric pattern. During deformation, this microstructure allows local coordinated displacement and rotation of the nanorods, enabling auxetic behavior while maintaining one of the highest strengths among natural materials. These findings lay a foundation for designing biomimetic auxetic materials with extreme strength and high stiffness.
UR - http://www.scopus.com/inward/record.url?scp=85143300934&partnerID=8YFLogxK
U2 - 10.1126/sciadv.add4644
DO - 10.1126/sciadv.add4644
M3 - Article
VL - 8.2022
JO - Science Advances
JF - Science Advances
SN - 2375-2548
IS - 48
M1 - eadd4644
ER -
