Observations of Dense Liquid Phase-Assisted Nanocrystal Growth and Coalescence,Crystal Growth & Design

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Observations of Dense Liquid Phase-Assisted Nanocrystal Growth and Coalescence
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2021-10-26 , DOI: 10.1021/acs.cgd.1c00498
Gen Li ₁ , Nana He ₁ , Junxian Deng ₁ , Jiaxin Liu ₁ , Yue Sun ₁ , Mi Qu ₁ , Youhong Jiang ₁ , Tiqing Zhao ₁ , Shi-Yuan Zhou ₁ , Hongbin Zeng ₁ , Qizheng Zheng ₁ , Hong-Gang Liao _{1,

2} , Shi-Gang Sun ₁

Affiliation

Considerable theoretical and experimental efforts have been made on the nonclassical crystallization theory for a better understanding of the crystallization process to improve nanomaterial design and preparation. It is commonly suggested that nucleation often occurs through a multiple-step mechanism with an amorphous dense liquid phase (DLP) intermediate, which plays a crucial role during the nucleation process from supersaturated solutions to nanocrystals. The behaviors of the DLP after nanocrystal nucleation, however, are largely unknown. Herein, using in situ liquid phase transmission electron microscopy, we examine the role of the DLP throughout the growth of palladium nanocrystals. The DLP mediates mass transportation between particles and provides a relatively stationary liquid environment in which the metastable nanoparticles can grow and restructure. Our observations bring new insight into the study of the DLP and the role it plays in crystallization.

中文翻译：

密集液相辅助纳米晶体生长和聚结的观察

为了更好地理解结晶过程以改进纳米材料的设计和制备，已经对非经典结晶理论进行了大量的理论和实验工作。通常认为，成核通常通过多步骤机制发生，其中非晶致密液相 (DLP) 中间体在从过饱和溶液到纳米晶体的成核过程中起着至关重要的作用。然而，纳米晶成核后 DLP 的行为在很大程度上是未知的。在此，原位使用通过液相透射电子显微镜，我们检查了 DLP 在整个钯纳米晶体生长过程中的作用。DLP 介导粒子之间的质量传输，并提供一个相对稳定的液体环境，在该环境中亚稳态纳米粒子可以生长和重组。我们的观察为 DLP 的研究及其在结晶中的作用带来了新的见解。

更新日期：2021-11-03

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