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首页> 外文期刊>Advanced Functional Materials >A Mesocrystal-Like Morphology Formed by Classical Polymer-Mediated Crystal Growth
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A Mesocrystal-Like Morphology Formed by Classical Polymer-Mediated Crystal Growth

机译：由经典的聚合物介导的晶体生长形成的类似于中晶的形态

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摘要

Growth by oriented assembly of nanoparticles is a widely reported phenomenon for many crystal systems. While often deduced through morphological analyses, direct evidence for this assembly behavior is limited and, in the calcium carbonate (CaCO3) system, has recently been disputed. However, in the absence of a particle-based pathway, the mechanism responsible for the creation of the striking morphologies that appear to consist of subparticles is unclear. Therefore, in situ atomic force microscopy is used to investigate the growth of calcite crystals in solutions containing a polymer additive known for its ability to generate crystal morphologies associated with mesocrystal formation. It is shown that classical growth processes that begin with impurity pinning of atomic steps, leading to stabilization of new step directions, creation of pseudo-facets, and extreme surface roughening, can produce a microscale morphology previously attributed to nonclassical processes of crystal growth by particle assembly.
机译：通过纳米粒子的定向组装生长是许多晶体系统广泛报道的现象。尽管通常通过形态分析得出，但是这种组装行为的直接证据是有限的，并且在碳酸钙（CaCO3）系统中，最近受到争议。但是，在没有基于粒子的途径的情况下，尚不清楚造成由子粒子组成的惊人形态的机制。因此，原位原子力显微镜用于研究方解石晶体在含有聚合物添加剂的溶液中的生长，该聚合物添加剂具有产生与介晶形成相关的晶体形态的能力。结果表明，经典的生长过程始于原子台阶的杂质固定，从而导致了新台阶方向的稳定，伪面的产生以及极端的表面粗糙化，可以产生以前归因于粒子生长晶体的非经典过程的微观形态。部件。

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  • 来源
    《Advanced Functional Materials》 |2017年第40期|1701658.1-1701658.7|共7页
  • 作者

    Smeets Paul J. M.; Cho Kang Rae; Sommerdijk Nico A. J. M.; De Yoreo James J.;

  • 作者单位

    Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA|Eindhoven Univ Technol, Lab Mat & Interface Chem, POB 513, NL-5600 MB Eindhoven, Netherlands|Eindhoven Univ Technol, Ctr Multiscale Electron Microscopy, Dept Chem Engn & Chem, POB 513, NL-5600 MB Eindhoven, Netherlands|Eindhoven Univ Technol, Inst Complex Mol Syst, POB 513, NL-5600 MB Eindhoven, Netherlands|Pacific Northwest Natl Lab, Phys Sci Div, Richland, WA 99352 USA|Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA;

    Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA;

    Eindhoven Univ Technol, Lab Mat & Interface Chem, POB 513, NL-5600 MB Eindhoven, Netherlands|Eindhoven Univ Technol, Ctr Multiscale Electron Microscopy, Dept Chem Engn & Chem, POB 513, NL-5600 MB Eindhoven, Netherlands|Eindhoven Univ Technol, Inst Complex Mol Syst, POB 513, NL-5600 MB Eindhoven, Netherlands;

    Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA|Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA;

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  • 正文语种 eng
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  • 关键词

    atomic force microscopy; calcium carbonate; crystal growth;

    机译：原子力显微镜;碳酸钙;晶体生长;

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