Anisotropic Growth of Silver Dendrites Regulated by Preferential Adsorption of Nitrate Ions on Crystal Facets

IF 1.5 4区材料科学 Q3 CRYSTALLOGRAPHY

Crystal Research and Technology Pub Date : 2021-05-25 DOI:10.1002/crat.202100014

Haoyang Huang, Xiangyu Dou, Yongsheng Han

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引用次数: 1

Abstract

Dendritic structures are widely present in nature, from snowflakes to dendritic cells. However, their formation mechanisms are unclear, which causes long unsolved engineering problems, such as lithium dendrites. Here a strategy to control the growth of dendritic structures by the selective adsorption of ions on crystal facets is reported. Silver particles are synthesized by galvanic replacement reaction and the growth anisotropy of crystals is regulated by changing the concentration of nitrate ions in silver nitrate precursor solution. At a low concentration of nitrate ions, messy branching particles are synthesized while symmetric dendrites are generated at a high concentration of nitrate ions. Molecular dynamics simulation suggests that the selective adsorption of abundant nitrate ions on low‐energy facets promotes the prior growth of the high‐energy facets, resulting in the symmetric dendritic structures. When the potassium nitrate is changed to sodium nitrate, similar phenomena are obtained, confirming the role of selective adsorption of additives in regulating the growth anisotropy of crystals.

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硝酸盐离子在银枝晶表面的优先吸附调控银枝晶的各向异性生长

树突结构在自然界中广泛存在，从雪花到树突细胞。然而，它们的形成机制尚不清楚，这导致了长期未解决的工程问题，如锂枝晶。本文报道了一种通过离子在晶体表面的选择性吸附来控制枝晶结构生长的策略。通过电替换反应合成银颗粒，通过改变硝酸银前驱体溶液中硝酸离子的浓度来调节晶体的生长各向异性。在低浓度硝酸盐离子下，合成杂乱的分支粒子，而在高浓度硝酸盐离子下，生成对称的枝晶。分子动力学模拟表明，大量硝酸盐离子在低能面的选择性吸附促进了高能面的优先生长，从而形成对称的枝晶结构。当硝酸钾变为硝酸钠时，得到了类似的现象，证实了添加剂的选择性吸附对晶体生长各向异性的调节作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crystal Research and Technology 化学-晶体学

自引率

6.70%

发文量

121

审稿时长

1.9 months

期刊介绍： The journal Crystal Research and Technology is a pure online Journal (since 2012). Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of -crystal growth techniques and phenomena (including bulk growth, thin films) -modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals) -industrial crystallisation -application of crystals in materials science, electronics, data storage, and optics -experimental, simulation and theoretical studies of the structural properties of crystals -crystallographic computing