Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure

Gokcekaya, Ozkan; Ueda, Kyosuke; Narushima, Takayuki; Nakano, Takayoshi

doi:https://doi.org/10.1039/d0nr04208k

アクセス数:110件（2024-06-03 05:13 集計）

固定URL: https://hdl.handle.net/11094/89802

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タイトル	Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure
著者	著者名 Gokcekaya, Ozkan
	NRID 1000040507901 1000040507901 著者名 Ueda, Kyosuke
	NRID 1000020198394 1000020198394 著者名 Narushima, Takayuki
	NRID 1000030243182 1000030243182 ORCID 0000-0001-8052-1698 0000-0001-8052-1698 researchmap permalink read0013987 read0013987 Scopus Author ID 7403896013 7403896013 著者名 Nakano, Takayoshi
内容	Gokcekaya O., Ueda K., Narushima T., et al. Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure. Nanoscale, 12, 31, 16596. https://doi.org/10.1039/d0nr04208k.
抄録	Structural evaluation of ionic additions in calcium phosphates that enhance their performance is a long-lasting area of research in the field of biomedical materials. Ionic incorporation in ß-tricalcium phosphate (ß-TCP) structures is indispensable for obtaining desirable properties for specific functions and applications. Owing to its complex structure and beam-sensitive nature, determining the extent of ion incorporation and its corresponding location in the ß-TCP structure is challenging. Further, very few experimental studies have been able to estimate the location of Ag atoms incorporated in a ß-TCP structure while considering the associated changes in lattice parameters. Although the incorporation alters the lattice parameters, the alteration is not significant enough for estimating the location of the incorporated Ag atoms. Here, Ag incorporation in a ß-TCP structure was evaluated on atomic scale using scanning transmission electron microscopy (STEM). To the best of our knowledge, this is the first report to unambiguously determine the location of the incorporated Ag atoms in the ß-TCP structure by comparing z-contrast profiles of the Ag and Ca atoms by combining the state-of-art STEM observations and STEM image simulations. The Ag incorporation in the Ca(4) sites of ß-TCP, as estimated by the Rietveld refinement, was in good agreement with the high-angle annular dark-field STEM observations and the simulations of the location of Ag atoms for [001] and [010] zone axes.
出版者	Royal Society of Chemistry
収録物名	Nanoscale
巻(号)	12
ページ	16596-16604
刊行年月	2020-07-29
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89802
PISSN	20403364
eISSN	20403372
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1039/d0nr04208k
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 3.0 Unported License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Nanoscale. 2020, 12, p. 16596-16604
DC.title	Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure
DC.creator	Gokcekaya, Ozkan
	Ueda, Kyosuke
	Narushima, Takayuki
	Nakano, Takayoshi
DC.publisher	Royal Society of Chemistry
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2020-07-29
DC.identifier	https://doi.org/10.1039/d0nr04208k
DC.description	Gokcekaya O., Ueda K., Narushima T., et al. Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure. Nanoscale, 12, 31, 16596. https://doi.org/10.1039/d0nr04208k.
DCTERMS.abstract	Structural evaluation of ionic additions in calcium phosphates that enhance their performance is a long-lasting area of research in the field of biomedical materials. Ionic incorporation in ß-tricalcium phosphate (ß-TCP) structures is indispensable for obtaining desirable properties for specific functions and applications. Owing to its complex structure and beam-sensitive nature, determining the extent of ion incorporation and its corresponding location in the ß-TCP structure is challenging. Further, very few experimental studies have been able to estimate the location of Ag atoms incorporated in a ß-TCP structure while considering the associated changes in lattice parameters. Although the incorporation alters the lattice parameters, the alteration is not significant enough for estimating the location of the incorporated Ag atoms. Here, Ag incorporation in a ß-TCP structure was evaluated on atomic scale using scanning transmission electron microscopy (STEM). To the best of our knowledge, this is the first report to unambiguously determine the location of the incorporated Ag atoms in the ß-TCP structure by comparing z-contrast profiles of the Ag and Ca atoms by combining the state-of-art STEM observations and STEM image simulations. The Ag incorporation in the Ca(4) sites of ß-TCP, as estimated by the Rietveld refinement, was in good agreement with the high-angle annular dark-field STEM observations and the simulations of the location of Ag atoms for [001] and [010] zone axes.
DC.rights	This article is licensed under a Creative Commons Attribution 3.0 Unported License.
DC.format	89802
citation_title	Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure
citation_author	Gokcekaya, Ozkan
	Ueda, Kyosuke
	Narushima, Takayuki
	Nakano, Takayoshi
citation_publisher	Royal Society of Chemistry
citation_language	英語
citation_date	2020-07-29
citation_journal_title	Nanoscale
citation_volume	12
citation_firstpage	16596
citation_lastpage	16604
citation_doi	https://doi.org/10.1039/d0nr04208k
citation_public_url	https://hdl.handle.net/11094/89802

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