异质界面对磷酸二氢铵单液滴结晶行为的影响

doi:10.11896/cldb.24010234

材料导报

2025, Vol. 39

Issue (1): 24010234-5 https://doi.org/10.11896/cldb.24010234

无机非金属及其复合材料

异质界面对磷酸二氢铵单液滴结晶行为的影响

胡乾宇¹, 陈昆峰^1,*, 薛冬峰^2,*

1 山东大学新一代半导体材料研究院, 晶体材料国家重点实验室, 济南 250100
2 电子科技大学(深圳)高等研究院, 广东深圳 518110

Influence of Heterointerface on Crystallization Behavior of Ammonium Dihydrogen Phosphate Isolated Droplet

HU Qianyu¹, CHEN Kunfeng^1,*, XUE Dongfeng^2,*

1 Institute of Novel Semiconductors, State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
2 Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518110, Guangdong, China

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摘要结晶过程与材料合成、矿物形成、制药工业等紧密相关,理解结晶机理是材料、物理、化学等领域的研究热点。许多非常重要的结晶过程,如冻胀、生物矿化、纳米材料的合成和水垢形成,都是以小体积而不是本体溶液的形式发生的。在微液滴、微流控装置、孔隙等有限体积中的结晶,往往表现出亚稳态多晶型、凝固点降低、择优取向的晶体等特殊现象。本工作研究异质界面对磷酸二氢铵(ADP)单液滴结晶行为的影响。利用原位显微镜、原位拉曼、扫描电子显微镜、X射线衍射等技术,研究了ADP单液滴在不同异质界面上的结晶过程,发现了ADP在低过饱和度和高过饱和度条件下的结晶路径。通过调整液滴与基底之间的接触角,获得了过饱和度S≈3.0的ADP结晶溶液,其具有新的局域结构。在高过饱和度条件下ADP未出现亚稳的单斜相。该研究证明了在微液滴环境中存在多种成核路径,为探索限域条件下的结晶机理提供了新方案。

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	胡乾宇
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关键词: 磷酸二氢铵单液滴结晶成核过饱和溶液

Abstract: The crystallization process is closely related to material synthesis, mineral formation, and the pharmaceutical industry, and understanding the mechanisms of crystallization is a hot topic of research in materials science, physics, and chemistry. Many critical crystallization processes, such as frost heave, biomineralization, synthesis of nanomaterials, and scale formation, occur in small volumes rather than in bulk solutions. Crystallization within confined volumes, such as microdroplets, microfluidic devices, and pores, often exhibits special phenomena like the formation of metastable polymorphs, depression of freezing points, and preferred crystal orientation. This work investigates the influence of heterogeneous interfaces on the crystallization behavior of single droplets of ammonium dihydrogen phosphate (ADP). Utilizing in-situ microscopy, in-situ Raman spectroscopy, scanning electron microscopy, and X-ray diffraction, we studied the crystallization process of single ADP droplets on various heterogeneous interfaces, uncovering crystallization pathways of ADP under both low and high supersaturation conditions. By adjusting the contact angle between the droplet and the substrate, a supersaturated ADP solution with a saturation level (S) of approximately 3.0 was obtained, exhibiting a new local structure. Under high supersaturation conditions, the metastable monoclinic phase of ADP was not observed. This research demonstrates multiple nucleation pathways in a microdroplet environment, offering new insights into crystallization mechanisms under confined conditions.

Key words: ADP isolated droplet crystallization nucleation supersaturation

出版日期: 2025-01-10 发布日期: 2025-01-10

ZTFLH:

O78

基金资助: 国家自然科学基金(52220105010;51832007);山东省自然科学基金重大基础研究项目(ZR2020ZD35)

通讯作者: *陈昆峰,山东大学新一代半导体材料研究院教授、博士研究生导师,山东大学齐鲁青年学者。目前主要从事光电晶体生长、器件性能等方面的研究工作。kunfeng.chen@sdu.edu.cn;薛冬峰,电子科技大学(深圳)高等研究院教授、博士研究生导师。聚焦于新材料理论研究与设计、大尺寸功能晶体的制备与研究、稀土开发与利用、新能源材料等方面的研究。dfxue@uestc.edu.cn

作者简介: 胡乾宇,现为山东大学晶体材料研究院国家重点实验室硕士研究生。主要研究领域为多尺度材料结晶机理。

引用本文:

胡乾宇, 陈昆峰, 薛冬峰. 异质界面对磷酸二氢铵单液滴结晶行为的影响[J]. 材料导报, 2025, 39(1): 24010234-5.
HU Qianyu, CHEN Kunfeng, XUE Dongfeng. Influence of Heterointerface on Crystallization Behavior of Ammonium Dihydrogen Phosphate Isolated Droplet. Materials Reports, 2025, 39(1): 24010234-5.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.24010234 或 https://www.mater-rep.com/CN/Y2025/V39/I1/24010234

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