• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced functional materials >Local Heating Transforms Amorphous Calcium Carbonate to Single Crystals with Defined Morphologies
【24h】

Local Heating Transforms Amorphous Calcium Carbonate to Single Crystals with Defined Morphologies

机译：Local Heating Transforms Amorphous Calcium Carbonate to Single Crystals with Defined Morphologies

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

The use of amorphous calcium carbonate (ACC) as a precursor phaseaffords organisms with outstanding control over the formation of calciteand aragonite biominerals. Essential to this strategy is that the ACC ismaintained within confined volumes in the absence of bulk water. Thisensures that the ACC undergoes a pseudomorphic transformation and thatthe organism can independently control nucleation and growth. However,comparable control has proven hard to achieve in synthetic systems. Here,a straightforward method is demonstrated for controlling the crystallizationof ACC thin films in which nucleation is first triggered using a heated probe,and then growth is sustained by incubating the film at a lower temperature.By independently controlling nucleation and growth, sub-millimeter calcitesingle crystals can be generated when and where it is desired, morphologiesranging from discs to squares to serpentine strips can be created, andarrays of crystals formed. The mechanism and energetics of crystallizationof the ACC are studied using in situ transmission electron microscopy andcontinuity between the ACC and calcite at the growth front is demonstrated.It is envisaged that this method can be applied to the formation of largesingle crystals of alternative functional materials that form via amorphousprecursor phases.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号