Deconstructing 3D growth rates from transmission microscopy images of facetted crystals as captured in situ within supersaturated aqueous solutions.

IF 6.1 3区 材料科学 Q1 Biochemistry, Genetics and Molecular Biology Journal of Applied Crystallography Pub Date : 2024-09-25 eCollection Date: 2024-10-01 DOI:10.1107/S1600576724008173
Cai Y Ma, Chen Jiang, Thomas P Ilett, Thomas A Hazlehurst, David C Hogg, Kevin J Roberts
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Abstract

Here, a morphologically based approach is used for the in situ characterization of 3D growth rates of facetted crystals from the solution phase. Crystal images of single crystals of the β-form of l-glutamic acid are captured in situ during their growth at a relative supersaturation of 1.05 using transmission optical microscopy. The crystal growth rates estimated for both the {101} capping and {021} prismatic faces through image processing are consistent with those determined using reflection light mode [Jiang, Ma, Hazlehurst, Ilett, Jackson, Hogg & Roberts (2024 ▸). Cryst. Growth Des. 24, 3277-3288]. The growth rate in the {010} face is, for the first time, estimated from the shadow widths of the {021} prismatic faces and found to be typically about half that of the {021} prismatic faces. Analysis of the 3D shape during growth reveals that the initial needle-like crystal morphology develops during the growth process to become more tabular, associated with the Zingg factor evolving from 2.9 to 1.7 (>1). The change in relative solution supersaturation during the growth process is estimated from calculations of the crystal volume, offering an alternative approach to determine this dynamically from visual observations.

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从超饱和水溶液中原位捕捉到的刻面晶体透射显微镜图像解构三维生长率。
本文采用一种基于形态学的方法,对溶液相刻面晶体的三维生长率进行了原位表征。在相对过饱和度为 1.05 的条件下,使用透射光学显微镜原位捕捉了 l-谷氨酸 β 形单晶体生长过程中的晶体图像。通过图像处理估算出的{101}盖面和{021}棱面的晶体生长速率与使用反射光模式测定的速率一致[Jiang, Ma, Hazlehurst, Ilett, Jackson, Hogg & Roberts (2024 ▸).Cryst.Growth Des.24, 3277-3288].根据{021}棱柱面的阴影宽度,首次估算出{010}面的生长速率,发现其通常约为{021}棱柱面的一半。对晶体生长过程中的三维形状进行分析后发现,最初的针状晶体形态在生长过程中逐渐变得更加板状,这与 Zingg 因子从 2.9 演变到 1.7(>1)有关。生长过程中相对溶液过饱和度的变化是通过计算晶体体积估算出来的,这提供了一种替代方法,可以通过肉眼观察来动态确定过饱和度。
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来源期刊
CiteScore
10.00
自引率
3.30%
发文量
178
审稿时长
4.7 months
期刊介绍: Many research topics in condensed matter research, materials science and the life sciences make use of crystallographic methods to study crystalline and non-crystalline matter with neutrons, X-rays and electrons. Articles published in the Journal of Applied Crystallography focus on these methods and their use in identifying structural and diffusion-controlled phase transformations, structure-property relationships, structural changes of defects, interfaces and surfaces, etc. Developments of instrumentation and crystallographic apparatus, theory and interpretation, numerical analysis and other related subjects are also covered. The journal is the primary place where crystallographic computer program information is published.
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