Anisotropic nanowire growth via a self-confined amorphous template process: A reconsideration on the role of amorphous calcium carbonate

Mao, Li‐Bo; Xue, Lei; Gebauer, Denis; Liu, Lei; Yu, Xiaofang; Liu, Yang-Yi; Cölfen, Helmut; Yu, Shu‐Hong

doi:10.1007/s12274-016-1029-6

Cited by 9 publications

(9 citation statements)

References 58 publications

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“…Since Mg 2+ stabilizes ACP, , the Mg-rich amorphous layer at the surface hindered the lateral growth of the nanorods during the growth of the FPN-M arrays. This resulted in the formation of fine FPN-M nanorods. , The aforementioned phenomenon is also observed in the human tooth, shark tooth, rodent tooth, and nacre …”

Section: Resultsmentioning

confidence: 74%

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Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

Ping

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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Tooth enamel is composed of arrayed fluorapatite (FAP) or hydroxyapatite nanorods modified with Mg-rich amorphous layers. Although it is known that Mg2+ plays an important role in the formation of enamel, there is limited research on the regulatory role of Mg2+ in the synthesis of enamel-like materials. Therefore, we focus on the regulatory behavior of Mg2+ in the fabrication of biomimetic mineralized enamel-like structural materials. In the present study, we adopt a bioprocess-inspired room-temperature mineralization technique to synthesize a multilayered array of enamel-like columnar FAP/polymer nanocomposites controlled by Mg2+ (FPN-M). The results reveal that the presence of Mg2+ induced the compaction of the array and the formation of a unique Mg-rich amorphous-reinforced architecture. Therefore, the FPN-M array exhibits excellent mechanical properties. The hardness (2.42 ± 0.01 GPa) and Young’s modulus (81.5 ± 0.6 GPa) of the as-prepared FPN-M array are comparable to those of its biological counterparts; furthermore, the enamel-like FPN-M array is translucent. The hardness and Young’s modulus of the synthetic array of FAP/polymer nanocomposites without Mg2+ control (FPN) are 0.51 ± 0.04 and 43.5 ± 1.6 GPa, respectively. The present study demonstrates a reliable bioprocess-inspired room-temperature fabrication technique for the development of advanced high-performance composite materials.

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Section: Resultsmentioning

confidence: 74%

“…This resulted in the formation of fine FPN-M nanorods. 27,38 The aforementioned phenomenon is also observed in the human tooth, 27 shark tooth, 18 rodent tooth, 24 and nacre. 29 3.3.…”

Section: Resultsmentioning

confidence: 85%

Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

Ping

Wei

et al. 2021

ACS Appl. Mater. Interfaces

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“…In this sense, the situation is rather analogous to additive incorporation into the mineral phase, where the main effect is the lowering of supersaturation and a weak inhibition of nucleation, as discussed in Section 2.1. Also, in such mesophases, confinement effects can become important [32][33][34], and the increased viscosity may play an additional role toward inhibition effects. In our opinion, the observed facilitation of nucleation in such phases [28] can be better explained within the notions of "non-classical" nucleation theories as described below (Section 3.2).…”

Section: Additive Mesophases As Environments For Nucleationmentioning

confidence: 99%

How Can Additives Control the Early Stages of Mineralisation?

Gebauer

2018

Minerals

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The interactions between additives and mineral precursors and intermediates are at the heart of additive-controlled crystallisation, which is of high importance for various fields. In this commentary, we reflect on potential modes of additive control according to classical nucleation theory on one hand, and from the viewpoint of the so-called pre-nucleation cluster pathway on the other. This includes a brief review of the corresponding literature. While the roles of additives are discussed generally, i.e., without specific chemical or structural details, corresponding properties are outlined where possible. Altogether, our discussion illustrates that “non-classical” nucleation pathways promise an improved understanding of additive-controlled scenarios, which could be utilised in targeted applications in various fields, ranging from scale inhibition to materials chemistry.

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“…However, no amorphous layer was found at the edge of FAP nanorods after 96 h for complete mineralization (Figure S12). It can be reasonably inferred that the amorphous layer on the surface of nanorods will limit their lateral growth and form finer nanorods controlled by Mg 2+ . ,, During the mineralization process of the FAP array, thicker nanorods will eventually be formed due to the lack of restriction of the surface amorphous layer. On the contrary, the amorphous layer on the edge of each nanorod in the samples controlled by Mg 2+ generated inherent surface stresses to confine the size of nanorods.…”

Section: Resultsmentioning

confidence: 99%

Mechanically Reinforced Artificial Enamel by Mg²⁺-Induced Amorphous Intergranular Phases

Yang

Xue

et al. 2022

ACS Nano

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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 Mg 2+ (FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg 2+ 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 Mg 2+ 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 ∼8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg 2+ , respectively.

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Anisotropic nanowire growth via a self-confined amorphous template process: A reconsideration on the role of amorphous calcium carbonate

Cited by 9 publications

References 58 publications

Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

How Can Additives Control the Early Stages of Mineralisation?

Mechanically Reinforced Artificial Enamel by Mg²⁺-Induced Amorphous Intergranular Phases

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Anisotropic nanowire growth via a self-confined amorphous template process: A reconsideration on the role of amorphous calcium carbonate

Cited by 9 publications

References 58 publications

Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

Bioprocess-Inspired Room-Temperature Synthesis of Enamel-like Fluorapatite/Polymer Nanocomposites Controlled by Magnesium Ions

How Can Additives Control the Early Stages of Mineralisation?

Mechanically Reinforced Artificial Enamel by Mg2+-Induced Amorphous Intergranular Phases

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Mechanically Reinforced Artificial Enamel by Mg²⁺-Induced Amorphous Intergranular Phases