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Artificial mineral films similar to biogenic calcareous shells: oriented calcite nanorods on a self-standing polymer sheet

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Abstract

Micrometre-thick calcareous shells consisting of c-axis-oriented calcite nanorods are produced on an organic sheet as foraminiferal tests and isopod cornea cuticles. Here, we produced mineral films similar to biogenic calcareous shells on a self-standing polymer sheet in a supersaturated solution system by multistep crystal growth with the adjustment of the concentration ratio of poly(acrylic acid) (PAA) as a soluble controlling agent. In the initial stage, selective high-density nucleation was achieved at a relatively low PAA to calcium ion ratio (R = 1.0–1.2) to form of a calcite seed layer on the surface of conventional polyvinyl alcohol. Calcite nanorods elongated in the c direction were then grown perpendicularly to the seed layer in the progressive stages at a relatively high PAA ratio (R = 1.5–2.0). The artificial mineral films consisting of c-axis-oriented nanorods are suggested to exhibit mechanical properties similar to those of biogenic calcareous shells.

Graphical abstract: Artificial mineral films similar to biogenic calcareous shells: oriented calcite nanorods on a self-standing polymer sheet

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Publication details

The article was received on 12 Dec 2017, accepted on 30 Jan 2018 and first published on 30 Jan 2018


Article type: Paper
DOI: 10.1039/C7CE02143G
Citation: CrystEngComm, 2018, Advance Article
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    Artificial mineral films similar to biogenic calcareous shells: oriented calcite nanorods on a self-standing polymer sheet

    Y. Nagai, Y. Oaki and H. Imai, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C7CE02143G

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