Real-Time Observation of CaCO3 Mineralization in Highly Supersaturated Graphene Liquid Cells

被引：17

作者：

Dae, Kyun Seong ^{[1
]}

Chang, Joon Ha ^{[1
]}

Koo, Kunmo ^{[1
]}

Park, Jungjae ^{[1
]}

Kim, Jae Sung ^{[1
]}

Yuk, Jong Min ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Daejeon 305701, South Korea

来源：

ACS OMEGA | 2020年 / 5卷 / 24期

基金：

新加坡国家研究基金会;

关键词：

CALCIUM-CARBONATE; ARAGONITE; CRYSTALLIZATION; NUCLEATION; PRECIPITATION; LAYERS;

D O I：

10.1021/acsomega.0c01300

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The mineralization dynamics of calcium carbonate is investigated under highly supersaturated conditions using graphene liquid cell transmission electron microscopy. We demonstrate that the mineralization process has three steps: nucleation, diffusion-limited growth, and Ostwald ripening/coalescence. In addition, we show that the polymorphs precipitate in a specific order, from metastable aragonite to stable calcite, thus proving Ostwald's rule of stages. In highly supersaturated solutions, the aragonite phase crystallizes in a stable manner, in addition to the calcite phase.

引用

页码：14619 / 14624

页数：6

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