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首页> 外文期刊>Crystal growth & design >Controlled Self-Organized Positioning of Small Aggregates by Patterns of (Sub)nanosized Active Sites
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Controlled Self-Organized Positioning of Small Aggregates by Patterns of (Sub)nanosized Active Sites

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摘要

Bottom-up structure formation starting from a molecular level, such as solidification, condensation, or precipitation, typically involves nucleation processes. Therefore, nucleation is ubiquitous in nature and technology and has constantly been in the focus of research. Studies on individual nucleation processes are mostly theoretical, because experiments on the very small length scales and short time scales inherent to nucleation are challenging. In particular consecutive investigations on-individually selected-active nucleation sites have never been performed. We have systematically studied how nanosized, porelike surface modifications repeatedly induce controlled, self-organized positioning of small aggregates through a heterogeneous nucleation and growth scenario. We here prove the nucleation activity of porelike surface modifications at the transition between continuum and molecular length scales. Moreover, it is demonstrated that even very shallow topological features-barely exceeding the natural roughness corrugations of a molecularly smooth surface-induce the positioning of aggregates, whereas slightly smaller roughness corrugations of the natural surface are not effective.

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  • 来源
    《Crystal growth & design》 |2017年第4期|1870-1875|共6页
  • 作者

    Perez-Garcia Rodrigo; Riegler Hans;

  • 作者单位

    Tech Univ Berlin, Inst Chem, Str 17 Juni 135, D-10623 Berlin, Germany;

    Max Planck Inst Colloids & Interfaces, Theory & Biosyst, Sci Pk Golm, D-14424 Potsdam, Germany;

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  • 正文语种 英语
  • 中图分类 晶体学;
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