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 et al.

Nanoscale, 2020, 12, 16596-16604

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Identifier to cite or link to this item: https://hdl.handle.net/11094/89802

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Title
Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a ß-tricalcium phosphate structure
Creator
CreatorName
Gokcekaya, Ozkan
NRID
1000040507901 1000040507901
CreatorName
Ueda, Kyosuke
NRID
1000020198394 1000020198394
CreatorName
Narushima, Takayuki
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
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.
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.
Publisher
Royal Society of Chemistry
Source Title
Nanoscale
Volume (Issue)
12
Page
16596-16604
Date of Issued
2020-07-29
Language
English
Handle URL
https://hdl.handle.net/11094/89802
PISSN
20403364
eISSN
20403372
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1039/d0nr04208k
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 3.0 Unported License.
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Version of Record
Category
学術雑誌論文 Journal Article