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

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Artificial mineral films similar to biogenic calcareous shells: oriented calcite nanorods on a self-standing polymer sheet†
CrystEngComm ( IF 2.6 ) Pub Date : 2018-01-30 00:00:00 , DOI: 10.1039/c7ce02143g
Yuta Nagai _{1,

2,

3,

4,

5} , Yuya Oaki _{1,

2,

3,

4,

5} , Hiroaki Imai _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

类似于矿物钙质壳的人造矿物膜：在自立式聚合物片材上定向的方解石纳米棒†

由微米厚的石灰质壳Ç轴导向方解石纳米棒上的有机片作为有孔虫和等足角膜表皮产生的。在这里，我们通过调整作为可溶性控制剂的聚丙烯酸（PAA）的浓度比，通过多步晶体生长，在过饱和溶液系统中在自立式聚合物片材上生产了类似于生物钙质壳的矿物膜。在初始阶段，在相对较低的PAA与钙离子之比（R = 1.0-1.2）下实现了选择性的高密度成核，从而在常规聚乙烯醇的表面上形成了方解石晶种层。方解石纳米棒在c中拉长然后在渐进阶段以相对较高的PAA比率（R = 1.5–2.0）垂直于种子层生长方向。建议由c轴取向的纳米棒组成的人工矿物膜表现出与生物钙质壳相似的机械性能。

更新日期：2018-01-30

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