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Multistage Transformation and Lattice Fluctuation at AgCl–Ag Interface
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.jpclett.7b02875 Jingshan S. Du 1, 2, 3, 4 , Jungwon Park 1, 5, 6 , QHwan Kim 7 , Wonho Jhe 7 , Vinayak P. Dravid 4 , Deren Yang 2 , David A. Weitz 1, 8
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.jpclett.7b02875 Jingshan S. Du 1, 2, 3, 4 , Jungwon Park 1, 5, 6 , QHwan Kim 7 , Wonho Jhe 7 , Vinayak P. Dravid 4 , Deren Yang 2 , David A. Weitz 1, 8
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Solid-state transformation between different materials is often accompanied by mechanical expansion and compression due to their volume change and structural evolution at interfaces. However, these two types of dynamics are usually difficult to monitor in the same time. In this work, we use in situ transmission electron microscopy to directly study the reduction transformation at the AgCl–Ag interface. Three stages of lattice fluctuations were identified and correlated to the structural evolution. During the steady state, a quasi-layered growth mode of Ag in both vertical and lateral directions were observed due to the confinement of AgCl lattices. The development of planar defects and depletion of AgCl are respectively associated with lattice compression and relaxation. Topography and structure of decomposing AgCl was further monitored by in situ scanning transmission electron microscopy. Silver species are suggested to originate from both the surface and the interior of AgCl, and be transported to the interface. Such mass transport may have enabled the steady state and lattice compression in this volume-shrinking transformation.
中文翻译：
AgCl-Ag界面的多级转变和晶格波动
不同材料之间的固态转变通常由于其体积变化和界面结构演变而伴随着机械膨胀和压缩。但是，通常很难同时监视这两种类型的动态。在这项工作中，我们使用原位透射电子显微镜直接研究AgCl-Ag界面的还原转化。确定了三个阶段的晶格波动并将其与结构演化相关。在稳态期间，由于AgCl晶格的局限，在垂直和横向方向上都观察到了准准的Ag生长模式。平面缺陷的发展和AgCl的耗尽分别与晶格压缩和弛豫相关。通过原位扫描透射电子显微镜进一步监测分解的AgCl的形貌和结构。建议银物种起源于AgCl的表面和内部，并被运输到界面。在这种体积缩小的转换中，这种质量传输可能已使稳态和晶格压缩成为可能。
更新日期：2017-11-17
中文翻译：
AgCl-Ag界面的多级转变和晶格波动
不同材料之间的固态转变通常由于其体积变化和界面结构演变而伴随着机械膨胀和压缩。但是，通常很难同时监视这两种类型的动态。在这项工作中，我们使用原位透射电子显微镜直接研究AgCl-Ag界面的还原转化。确定了三个阶段的晶格波动并将其与结构演化相关。在稳态期间，由于AgCl晶格的局限，在垂直和横向方向上都观察到了准准的Ag生长模式。平面缺陷的发展和AgCl的耗尽分别与晶格压缩和弛豫相关。通过原位扫描透射电子显微镜进一步监测分解的AgCl的形貌和结构。建议银物种起源于AgCl的表面和内部，并被运输到界面。在这种体积缩小的转换中，这种质量传输可能已使稳态和晶格压缩成为可能。
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