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首页> 外文期刊>Crystal growth & design >Ca-Doped Strontianite-Calcite Hybrid Micropillar Arrays Formed via Oriented Dissolution and Heteroepitaxial Growth on Calcite
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Ca-Doped Strontianite-Calcite Hybrid Micropillar Arrays Formed via Oriented Dissolution and Heteroepitaxial Growth on Calcite

机译：通过方解石的定向溶解和外延生长形成Ca掺杂的锶方解石-方解石杂化微柱阵列

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Even though heteroepitaxial growth of one-dimensional microstructures or three-dimensional islands has been realized via strategies such as chemical vapor deposition, molecular beam epitaxy, and solution phase, researchers have not succeeded in the formation of one-dimensional hybrid microstructures via the combination of heteroepitaxial growth and oriented dissolution up to now. In this work, well ordered single crystalline calcium-doped strontianite calcite hybrid micropillar arrays with the long axis along the [001] direction of the two phases were formed on calcite (104) substrates via heteroepitaxial growth of strontianite and oriented dissolution of calcite in aqueous solution for the first time. Energy-dispersive spectroscopy analysis shows that the micropillars are composed of strontianite occluded with about 12 mol % of Ca. During the growth process of strontianite, calcite cores formed in the inner side of the strontianite micropillars at the base stage via the oriented dissolution. The lattices of the strontianite and calcite match very well at the interface of calcite and strontianite. A novel formation mechanism is proposed for the formation of Ca-doped strontianite calcite hybrid micropillars via the synergetic process of the oriented dissolution of one carbonate mineral and the heteroepitaxial growth of another carbonate mineral in Volmer-Weber growth mode with a small lattice misfit. Ca-doped strontianite micropillar arrays might grow epitaxially on the calcite (001) and (104) planes with small misfits.
机译：尽管通过化学气相沉积，分子束外延和固溶相等策略已经实现了一维微观结构或三维孤岛的异质外延生长，但研究人员并没有成功地通过以下方法形成一维杂化微观结构：直到现在，异质外延生长和定向溶解。在这项工作中，通过方铅矿的异质外延生长和方解石在水中的定向溶解，在方解石（104）基底上形成了排列良好的单晶钙掺杂的锶方解石方解石杂化微柱阵列，长轴沿着两相的[001]方向第一次解决。能量色散光谱分析表明，微柱由含约12 mol％Ca的锶石组成。在锶长石的生长过程中，方解石芯通过定向溶解在基期在锶长石微柱的内侧形成。方解石和方解石的界面处，锶方解石和方解石的晶格非常匹配。提出了一种新的形成机理，通过一种碳酸盐矿物的定向溶解和另一种碳酸盐矿物在Volmer-Weber生长模式下的异质外延生长以及小的晶格失配的协同过程，形成了Ca掺杂的锶方解石杂化微柱。掺钙的锶锶微柱阵列可能在方解石（001）和（104）平面上外延生长且失配很小。

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