Aragonite CaCO3 thin-film formation by cooperation of Mg2+ and organic polymer matrices

Sugawara, Ayae; Kato, Takashi

doi:10.1039/a909566g

Cited by 154 publications

(168 citation statements)

References 16 publications

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“…On the other hand, based on the facts that the organic matters extracted from the nacres could effectively induce the nucleation and grow-up of the calcium carbonate and the types and contents of organic matters decided the degree of order of inorganic crystals [19][20][21][22][23], previous research results [24][25][26] concluded that the organic matters could induced lattice distortion of aragonite and lowered its degree of order and nanometer size effects of aragonite could lowered its degree of order also. In this scenario, comparing the 862 cm −1 IR peak related to aragonite of the samples with the peak of standard inorganic origin aragonite, the obvious blue shift (7.5 cm −1 ) indicated that there existed complex coordination effects between the organic and inorganic matters.…”

Section: Discussionmentioning

confidence: 99%

Study on the Microstructure of the Pinctada martensii Pearls and Its Significance

Zhang

Yang

2012

ISRN Spectroscopy

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The results of a microscopy, SEM-EDS, XRD, FTIR, and Raman spectra study of the nacres of the Pinctada martensii pearls from Zhanjiang city, China shows that they can be classified as the high-quality, medium-quality, and inferior-quality pearls. Aragonite, the main inorganic mineralogy in the nacres, was crystallized and grown up in the compartments formed by the silk and radial organic sheets originating from organic matters secreted by the mantle of mollusks. The crystalline orientations of aragonite tablets were changed from the (002), (012) and (102) crystalline plane nets in the early to the (002) crystalline plane net only in the later. The formation processes of the microstructure of the nacres could be divided into three stages. In the early stage, the precursor particles of aragonite nucleated and grew up fast; then, porous aragonite aggregates consisting of the fine aragonite crystals were formed. In the middle stage, the aragonite crystals directionally grew up to form the aragonite tablets and microlayers. The surface of the aragonite tablets and microlayers are rough and few porous, and the edges of the crystals were serrated. In the last stage, the aragonite tablets in the aragonite microlayer mixed perfectly together to form high-quality aragonite layer whose surface was smooth and perfect.

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Section: Discussionmentioning

confidence: 99%

Study on the Microstructure of the Pinctada martensii Pearls and Its Significance

Zhang

Yang

2012

ISRN Spectroscopy

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“…Since calcium carbonate does not crystallize as a film on glass, the slides were covered with a calcium carbonate thin film as in [15] for the first crystallization event. A solution of 1 wt% chitosan (Sigma 448877, medium mol.…”

Section: Substrate Preparationmentioning

confidence: 99%

“…PGA has evoked considerable interest in industrial applications, as it is non-toxic, non-immunogenic, biodegradable, edible, and water soluble [14]. Cationic polymeric substances such as polyaspartate have been demonstrated to promote the formation of calcium carbonate thin films on a chitosan substrate, where their negatively charged carboxyl groups serve as binding sites for calcium ions [15]. In this study, we employ γ-PGA as a mimic for the organic matrix of nacre, expecting that γ-PGA might show a calcium carbonate templating function similar to polyaspartate, while being easy to produce from natural producers or transgenic organisms [16,17].…”

Section: Introductionmentioning

confidence: 99%

Using bacteria to make improved, nacre-inspired materials

2016

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Nacre (mother of pearl) is an attractive model for the development of new materials. Its sheet structure of alternating layers of calcium carbonate and an organic matrix confers it highly desirable properties such as high toughness and strength. In this study, we produce a nacreinspired composite material using only bacterially-produced components. Calcium carbonate is crystallized via the action of ureolytic bacteria. After each crystallization event, we apply bacterially produced γ-polyglutamate (PGA) to the sample, which promotes layering compared to the PGA-free control. We show that the combination of these two compounds yields a layered material reminiscent of nacre, showing a way towards the biotechnological production of new, nacre-inspired materials.

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“…94,95 Thus, aragonite films were selectively produced by the addition of Mg 2þ to the chitosan-PAA system. 8 In recent years, the selective formation of the metastable polymorphs using organic agents has been studied in order to develop artificial biomimetic systems. Although calcite was grown on a porphyrin monolayer in a system containing PAA as a soluble agent, 14 aragonite and vaterite were obtained on a poly(vinyl alcohol) (PVA) substrate with PAA and poly(glutamic acid) (PGlu), respectively.…”

Section: Polymorph Control With Anhydrous Chitosan As a Microscopic Tmentioning

confidence: 99%

“…4 Thus, biomimetic approaches for crystal growth has been studied using various kinds of organic molecules and molecular assembly. [5][6][7][8][9][10][11][12][13][14][15] Morphogenesis with coexisting molecules has been reported by many research groups as well as the control of the nucleation sites with specific organic surfaces, including polymer films and self-assembled monolayers. Emergence of complex and hierarchical architectures of inorganic crystals through self-organization has been found in aqueous solution systems.…”

Section: Introductionmentioning

confidence: 99%

A Biomimetic Approach for Hierarchically Structured Inorganic Crystals through Self-Organization

Imai¹,

Oaki²,

Kotachi³

2006

Bulletin of the Chemical Society of Japan

131

103

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Here, we describe a biomimetic pathway for the synthesis of hierarchically structured inorganic crystals. In artificial systems mimicking biomineralization, versatile morphogenesis was achieved with the construction of bridged nanocrystals through self-organization by controlling growth with polymeric molecules such as a gel matrix and soluble anionic polymers. The self-organized formation of bridged crystals in hierarchical architectures is a possible new paradigm for advanced materials processing which could afford new inorganic-organic nanocomposites for use as novel functional materials.

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Aragonite CaCO3 thin-film formation by cooperation of Mg2+ and organic polymer matrices

Cited by 154 publications

References 16 publications

Study on the Microstructure of the Pinctada martensii Pearls and Its Significance

Study on the Microstructure of the Pinctada martensii Pearls and Its Significance

Using bacteria to make improved, nacre-inspired materials

A Biomimetic Approach for Hierarchically Structured Inorganic Crystals through Self-Organization

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