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Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis
APL Materials, Volume: 5, Issue: 11, Start page: 116103
Swansea University Authors: Mark Coleman, Richard Johnston
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DOI (Published version): 10.1063/1.4993202
Abstract
“Cuttlebone,” the internalized shell found in all members of the cephalopod family Sepiidae, is a sophisticated buoyancy device combining high porosity with considerable strength. Using a complementary suite of characterization tools, we identified significant structural, chemical, and mechanical va...
Published in: | APL Materials |
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ISSN: | 2166-532X 2166-532X |
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2017
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URI: | https://cronfa.swan.ac.uk/Record/cronfa36123 |
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Using a complementary suite of characterization tools, we identified significant structural, chemical, and mechanical variations across the different structural units of the cuttlebone: the dorsal shield consists of two stiff and hard layers with prismatic mineral organization which encapsulate a more ductile and compliant layer with a lamellar structure, enriched with organic matter. A similar organization is found in the chambers, which are separated by septa, and supported by meandering plates (“pillars”). Like the dorsal shield, septa contain two layers with lamellar and prismatic organization, respectively, which differ significantly in their mechanical properties: layers with prismatic organization are a factor of three stiffer and up to a factor of ten harder than those with lamellar organization. The combination of stiff and hard, and compliant and ductile components may serve to reduce the risk of catastrophic failure, and reflect the role of organic matter for the growth process of the cuttlebone. Mechanically “weaker” units may function as sacrificial structures, ensuring a stepwise failure of the individual chambers in cases of overloading, allowing the animals to retain near-neutral buoyancy even with partially damaged cuttlebones. Our findings have implications for our understanding of the structure-property-function relationship of cuttlebone, and may help to identify novel bioinspired design strategies for light-weight yet high-strength foams.</abstract><type>Journal Article</type><journal>APL Materials</journal><volume>5</volume><journalNumber>11</journalNumber><paginationStart>116103</paginationStart><publisher/><issnPrint>2166-532X</issnPrint><issnElectronic>2166-532X</issnElectronic><keywords>Anatomy, Failure analysis, Ductility, Membrane biochemistry, Garnet</keywords><publishedDay>31</publishedDay><publishedMonth>12</publishedMonth><publishedYear>2017</publishedYear><publishedDate>2017-12-31</publishedDate><doi>10.1063/1.4993202</doi><url/><notes>A collaborative research project led by Dr Johnston at Swansea University, working with a world leading nanomechanical group at Cambridge University led by Dr Oyen. The findings identify complex structure/property relationships within the structural component of the cuttlefish Sepia officinalis. We also reveal a potential crack-arresting mechanism in this biomaterial. Cuttlebone is researched as a potential scaffold material in regenerative medicine, therefore the findings contribute to the improved understanding of its use in the human body. The XPM (Accelerated property mapping) technique used at Swansea is the first published example of its use. 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2020-07-14T12:20:32.7079514 v2 36123 2017-10-17 Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis 73c5735de19c8a70acb41ab788081b67 Mark Coleman Mark Coleman true false 23282e7acce87dd926b8a62ae410a393 0000-0003-1977-6418 Richard Johnston Richard Johnston true false 2017-10-17 “Cuttlebone,” the internalized shell found in all members of the cephalopod family Sepiidae, is a sophisticated buoyancy device combining high porosity with considerable strength. Using a complementary suite of characterization tools, we identified significant structural, chemical, and mechanical variations across the different structural units of the cuttlebone: the dorsal shield consists of two stiff and hard layers with prismatic mineral organization which encapsulate a more ductile and compliant layer with a lamellar structure, enriched with organic matter. A similar organization is found in the chambers, which are separated by septa, and supported by meandering plates (“pillars”). Like the dorsal shield, septa contain two layers with lamellar and prismatic organization, respectively, which differ significantly in their mechanical properties: layers with prismatic organization are a factor of three stiffer and up to a factor of ten harder than those with lamellar organization. The combination of stiff and hard, and compliant and ductile components may serve to reduce the risk of catastrophic failure, and reflect the role of organic matter for the growth process of the cuttlebone. Mechanically “weaker” units may function as sacrificial structures, ensuring a stepwise failure of the individual chambers in cases of overloading, allowing the animals to retain near-neutral buoyancy even with partially damaged cuttlebones. Our findings have implications for our understanding of the structure-property-function relationship of cuttlebone, and may help to identify novel bioinspired design strategies for light-weight yet high-strength foams. Journal Article APL Materials 5 11 116103 2166-532X 2166-532X Anatomy, Failure analysis, Ductility, Membrane biochemistry, Garnet 31 12 2017 2017-12-31 10.1063/1.4993202 A collaborative research project led by Dr Johnston at Swansea University, working with a world leading nanomechanical group at Cambridge University led by Dr Oyen. The findings identify complex structure/property relationships within the structural component of the cuttlefish Sepia officinalis. We also reveal a potential crack-arresting mechanism in this biomaterial. Cuttlebone is researched as a potential scaffold material in regenerative medicine, therefore the findings contribute to the improved understanding of its use in the human body. The XPM (Accelerated property mapping) technique used at Swansea is the first published example of its use. Project partners Carl Zeiss and Bruker. COLLEGE NANME COLLEGE CODE Swansea University RCUK, EP/M028267/1 2020-07-14T12:20:32.7079514 2017-10-17T13:47:02.5091020 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering L. North 1 D. Labonte 2 M. L. Oyen 3 M. P. Coleman 4 H. B. Caliskan 5 R. E. Johnston 6 Mark Coleman 7 Richard Johnston 0000-0003-1977-6418 8 0036123-18012018102012.pdf APCCD77PL.pdf 2018-01-18T10:20:12.6700000 Output 5421252 application/pdf Version of Record true 2018-01-18T00:00:00.0000000 Released under the terms of a Creative Commons Attribution 4.0 (CC BY) license. true eng |
title |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
spellingShingle |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis Mark Coleman Richard Johnston |
title_short |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
title_full |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
title_fullStr |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
title_full_unstemmed |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
title_sort |
Interrelated chemical-microstructural-nanomechanical variations in the structural units of the cuttlebone of Sepia officinalis |
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73c5735de19c8a70acb41ab788081b67_***_Mark Coleman 23282e7acce87dd926b8a62ae410a393_***_Richard Johnston |
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Mark Coleman Richard Johnston |
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L. North D. Labonte M. L. Oyen M. P. Coleman H. B. Caliskan R. E. Johnston Mark Coleman Richard Johnston |
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“Cuttlebone,” the internalized shell found in all members of the cephalopod family Sepiidae, is a sophisticated buoyancy device combining high porosity with considerable strength. Using a complementary suite of characterization tools, we identified significant structural, chemical, and mechanical variations across the different structural units of the cuttlebone: the dorsal shield consists of two stiff and hard layers with prismatic mineral organization which encapsulate a more ductile and compliant layer with a lamellar structure, enriched with organic matter. A similar organization is found in the chambers, which are separated by septa, and supported by meandering plates (“pillars”). Like the dorsal shield, septa contain two layers with lamellar and prismatic organization, respectively, which differ significantly in their mechanical properties: layers with prismatic organization are a factor of three stiffer and up to a factor of ten harder than those with lamellar organization. The combination of stiff and hard, and compliant and ductile components may serve to reduce the risk of catastrophic failure, and reflect the role of organic matter for the growth process of the cuttlebone. Mechanically “weaker” units may function as sacrificial structures, ensuring a stepwise failure of the individual chambers in cases of overloading, allowing the animals to retain near-neutral buoyancy even with partially damaged cuttlebones. Our findings have implications for our understanding of the structure-property-function relationship of cuttlebone, and may help to identify novel bioinspired design strategies for light-weight yet high-strength foams. |
published_date |
2017-12-31T07:16:01Z |
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11.047501 |