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Hierarchical construction of ZnO architectures promoted by heterogeneous nucleation

机译：异质成核促进的ZnO结构的分层构建

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摘要

In this work, ZnO hierarchical architectures are successfully fabricated by concentration-controlled heterogeneous nucleation behavior through a one-pot solution method, free of organic structure-directing agents or pretreated substrates. A two-stage nucleation-growth process should account for the assembly process. First, the ZnO flowerlike plate aggregates formed with fast nucleation-growth kinetics. Then, these plate aggregates served as substrates to induce secondary heterogeneous nucleations under appropriate supersaturation degree. Ostwald-ripening assisted oriented attachment was believed to play a key role in the growth behavior. It provides an approach for the construction of hierarchical architectures with the advantage of precluding alien species. Raman scattering and room-temperature photoluminescence studies showed high consistency with respect to the crystallization improvement at elevated temperatures, which further showed that optical methods possess great potential in probing the microstructure of ZnO crystals.
机译：在这项工作中，通过一锅解决方法通过浓度控制的异相成核行为，成功地制造了ZnO分层体系结构，该结构不含有机结构导向剂或预处理的底物。两步成核生长过程应说明组装过程。首先，ZnO花状板聚集体以快速成核-生长动力学形成。然后，这些板状聚集体充当底物，以在适当的过饱和度下诱导二次异质成核。人们认为，奥斯特瓦尔德-成熟的辅助定向附着在生长行为中起关键作用。它提供了一种利用排除外来物种的优势构造层次结构的方法。拉曼散射和室温光致发光研究表明，在高温下结晶改善方面具有高度一致性，这进一步表明光学方法在探测ZnO晶体的微观结构方面具有巨大潜力。

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