Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness

Sang Ho Oh; Jin Kyung Kim; Yue Liu; Michael Wurmshuber; Xiang Long Peng; Jinsol Seo; Jiwon Jeong; Zhen Wang; Jana Wilmers; Celal Soyarslan; Jongil Kim; Boonsita Kittiwirayanon; Jeehun Jeong; Hyo Jeong Kim; Yang Hoon Huh; Daniel Kiener; Swantje Bargmann; Huajian Gao

doi:10.1126/sciadv.add4644

Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness

Sang Ho Oh^*, Jin Kyung Kim, Yue Liu, Michael Wurmshuber, Xiang Long Peng, Jinsol Seo, Jiwon Jeong, Zhen Wang, Jana Wilmers, Celal Soyarslan, Jongil Kim, Boonsita Kittiwirayanon, Jeehun Jeong, Hyo Jeong Kim, Yang Hoon Huh, Daniel Kiener, Swantje Bargmann, Huajian Gao

^*Corresponding author for this work

Nonlinear Solid Mechanics

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

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.

Original language	English
Article number	eadd4644
Journal	Science advances
Volume	8
Issue number	48
DOIs	https://doi.org/10.1126/sciadv.add4644
Publication status	Published - 2 Dec 2022

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Oh, S. H., Kim, J. K., Liu, Y., Wurmshuber, M., Peng, X. L., Seo, J., Jeong, J., Wang, Z., Wilmers, J., Soyarslan, C., Kim, J., Kittiwirayanon, B., Jeong, J., Kim, H. J., Huh, Y. H., Kiener, D., Bargmann, S., & Gao, H. (2022). Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness. Science advances, 8(48), Article eadd4644. https://doi.org/10.1126/sciadv.add4644

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title = "Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness",

abstract = "Materials displaying negative Poisson{\textquoteright}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.",

author = "Oh, {Sang Ho} and Kim, {Jin Kyung} and Yue Liu and Michael Wurmshuber and Peng, {Xiang Long} and Jinsol Seo and Jiwon Jeong and Zhen Wang and Jana Wilmers and Celal Soyarslan and Jongil Kim and Boonsita Kittiwirayanon and Jeehun Jeong and Kim, {Hyo Jeong} and Huh, {Yang Hoon} and Daniel Kiener and Swantje Bargmann and Huajian Gao",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant NRF-2020R1A2C2101735, NRF-2019M3D1A1078299, and NRF-2018M3C1B7021994 (to S.H.O.), KENTECH Research Grant KRG2022-01-019 (to S.H.O.), German Research Foundation (DFG) grant 192346071 - SFB 986 (to S.B., X.-L.P., C.S., and J.W.), NSF grant CMMI-1562904 (to H.G. and Y.L.), and European Research Council (ERC) grant 771146 TOUGHIT (to D.K. and M.W.). Publisher Copyright: Copyright {\textcopyright} 2022 The Authors.",

year = "2022",

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doi = "10.1126/sciadv.add4644",

language = "English",

volume = "8",

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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 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant NRF-2020R1A2C2101735, NRF-2019M3D1A1078299, and NRF-2018M3C1B7021994 (to S.H.O.), KENTECH Research Grant KRG2022-01-019 (to S.H.O.), German Research Foundation (DFG) grant 192346071 - SFB 986 (to S.B., X.-L.P., C.S., and J.W.), NSF grant CMMI-1562904 (to H.G. and Y.L.), and European Research Council (ERC) grant 771146 TOUGHIT (to D.K. and M.W.). 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.

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JO - Science advances

JF - Science advances

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Limpet teeth microstructure unites auxeticity with extreme strength and high stiffness

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