Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/19188 |
Resumo: | Hydroxyapatite nanocrystals in natural form are a major component of bone- a known piezoelectric material. Synthetic hydroxyapatite is widely used in bone grafts and prosthetic pyroelectric coatings as it binds strongly with natural bone. Nanocrystalline synthetic hydroxyapatite films have recently been found to exhibit strong piezoelectricity and pyroelectricity. While a spontaneous polarization in hydroxyapatite has been predicted since 2005, the reversibility of this polarization (i.e. ferroelectricity) requires experimental evidence. Here we use piezoresponse force microscopy to demonstrate that nanocrystalline hydroxyapatite indeed exhibits ferroelectricity: a reversal of polarization under an electrical field. This finding will strengthen investigations on the role of electrical polarization in biomineralization and bone- density related diseases. As hydroxyapatite is one of the most common biocompatible materials, our findings will also stimulate systematic exploration of lead and rare-metal free ferroelectric devices for potential applications in areas as diverse as in vivo and ex vivo energy harvesting, biosensing and electronics. |
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Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on SiliconNANOMETER-SCALESURFACENANOSCALEORDERHydroxyapatite nanocrystals in natural form are a major component of bone- a known piezoelectric material. Synthetic hydroxyapatite is widely used in bone grafts and prosthetic pyroelectric coatings as it binds strongly with natural bone. Nanocrystalline synthetic hydroxyapatite films have recently been found to exhibit strong piezoelectricity and pyroelectricity. While a spontaneous polarization in hydroxyapatite has been predicted since 2005, the reversibility of this polarization (i.e. ferroelectricity) requires experimental evidence. Here we use piezoresponse force microscopy to demonstrate that nanocrystalline hydroxyapatite indeed exhibits ferroelectricity: a reversal of polarization under an electrical field. This finding will strengthen investigations on the role of electrical polarization in biomineralization and bone- density related diseases. As hydroxyapatite is one of the most common biocompatible materials, our findings will also stimulate systematic exploration of lead and rare-metal free ferroelectric devices for potential applications in areas as diverse as in vivo and ex vivo energy harvesting, biosensing and electronics.NATURE PUBLISHING GROUP2017-12-07T19:03:59Z2013-01-01T00:00:00Z2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/19188eng2045-232210.1038/srep02215Lang, S. B.Tofail, S. A. M.Kholkin, A. L.Wojtas, M.Gregor, M.Gandhi, A. A.Wang, Y.Bauer, S.Krause, M.Plecenik, A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:37:11Zoai:ria.ua.pt:10773/19188Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:53:58.427764Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
title |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
spellingShingle |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon Lang, S. B. NANOMETER-SCALE SURFACE NANOSCALE ORDER |
title_short |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
title_full |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
title_fullStr |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
title_full_unstemmed |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
title_sort |
Ferroelectric Polarization in Nanocrystalline Hydroxyapatite Thin Films on Silicon |
author |
Lang, S. B. |
author_facet |
Lang, S. B. Tofail, S. A. M. Kholkin, A. L. Wojtas, M. Gregor, M. Gandhi, A. A. Wang, Y. Bauer, S. Krause, M. Plecenik, A. |
author_role |
author |
author2 |
Tofail, S. A. M. Kholkin, A. L. Wojtas, M. Gregor, M. Gandhi, A. A. Wang, Y. Bauer, S. Krause, M. Plecenik, A. |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Lang, S. B. Tofail, S. A. M. Kholkin, A. L. Wojtas, M. Gregor, M. Gandhi, A. A. Wang, Y. Bauer, S. Krause, M. Plecenik, A. |
dc.subject.por.fl_str_mv |
NANOMETER-SCALE SURFACE NANOSCALE ORDER |
topic |
NANOMETER-SCALE SURFACE NANOSCALE ORDER |
description |
Hydroxyapatite nanocrystals in natural form are a major component of bone- a known piezoelectric material. Synthetic hydroxyapatite is widely used in bone grafts and prosthetic pyroelectric coatings as it binds strongly with natural bone. Nanocrystalline synthetic hydroxyapatite films have recently been found to exhibit strong piezoelectricity and pyroelectricity. While a spontaneous polarization in hydroxyapatite has been predicted since 2005, the reversibility of this polarization (i.e. ferroelectricity) requires experimental evidence. Here we use piezoresponse force microscopy to demonstrate that nanocrystalline hydroxyapatite indeed exhibits ferroelectricity: a reversal of polarization under an electrical field. This finding will strengthen investigations on the role of electrical polarization in biomineralization and bone- density related diseases. As hydroxyapatite is one of the most common biocompatible materials, our findings will also stimulate systematic exploration of lead and rare-metal free ferroelectric devices for potential applications in areas as diverse as in vivo and ex vivo energy harvesting, biosensing and electronics. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01T00:00:00Z 2013 2017-12-07T19:03:59Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/19188 |
url |
http://hdl.handle.net/10773/19188 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2045-2322 10.1038/srep02215 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
NATURE PUBLISHING GROUP |
publisher.none.fl_str_mv |
NATURE PUBLISHING GROUP |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137591410294784 |