期刊
ACS NANO
卷 16, 期 7, 页码 10422-10430出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.2c00688
关键词
biomineralization; enamel-like structures; amorphous intergranular phases; mechanically reinforced arrays; magnesium ion regulation
类别
资金
- National Key Research and Development Program of China [2021YFA0715700]
- National Natural Science Foundation of China [51832003]
- State Key Laboratory of Materials Processing and Die & Mold Technology, Huazhong University of Science and Technology
This study successfully synthesized an amorphous intergranular phase controlled by Mg2+ and observed the enrichment of Mg2+ at grain boundaries, forming Mg-rich amorphous calcium phosphate. The amorphous intergranular phases act like glue to connect each nanorod, reinforcing the enamel-like arrays. The as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus significantly higher than those without controlled by Mg2+.
Amorphous intergranular phases in mature natural tooth enamel are found to provide better adhesion and could dramatically affect their mechanical performance as a structure reinforcing phase. This study successfully synthesized an amorphous intergranular phase enhanced fluorapatite array controlled by Mg2+ (FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg2+ is enriched at grain boundaries during the assembly of enamel-like fluorapatite arrays, leading to the formation of intergranular phases of Mg-rich amorphous calcium phosphate (Mg-ACP). APT results also demonstrated that the segregation of Mg2+ caused the chemical gradient in nanocrystalline attachment and realignment under the drive of inherent surface stress. These results indicate that the amorphous intergranular phases served like glue to connect each nanorod to reinforce the enamel-like arrays. Therefore, the as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus of 2.90 +/- 0.13 GPa and 67.9 +/- 3.4 GPa, which were similar to 8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg2+, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据