在现场X射线散射观察气-液-固体界面上的合性表
Xiao Wang1, Zhi Qiao1, Zhu Fang1
1School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
Nature communications
|March 19, 2025
概括
使用浸泡涂层形式的对流式自组装订购的合体多层. 这项研究揭示了一种动态的表轴过程,在此过程中,初始单层模拟了随后的层,由流体动力学和蒸发驱动.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 体科学 体科学 体科学
背景情况:
- 浸涂是一种广泛用于材料制造的技术.
- 在浸层涂层中对流自组合的基本机制尚未完全理解.
- 了解粒子组装动态对于控制材料特性至关重要.
研究的目的:
- 为了阐明 colloidal 颗粒在浸泡涂层过程中的实时组装机制.
- 研究蒸发动力学,流体动力学和粒子排序之间的关系.
- 揭示多层形成中的合性表皮质的过程.
主要方法:
- 在现场微角X射线散射 (SAXS) 以实时观察接口的组装.
- 现场扫描电子显微镜 (SEM) 用冷干燥进行结构分析.
- 蒸发动力学和流体动力学的数值模拟.
主要成果:
- 该研究解决了气体,液体和固体接口的短暂组装过程.
- 确定了一种动态的体表皮氧化过程,其中单层模板多层形成.
- 最终多层的排序与初始单层的排序直接相关.
- 模拟合理化了单层形成和表轴组装过程.
结论:
- 浸泡涂层中的对流自组装涉及一个动态的表轴过程.
- 界面现象和受控的蒸发是有序多层形成的关键.
- 这项研究为先进的材料设计提供了对浸涂装组件的基本见解.
相关概念视频
01:13Contact Angle
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
01:24Surface Tension
Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...