在DLVO和结构相互作用的存在下,在表面附近的体粒子限制的参数研究,使用布朗动力学模拟
Avinash Ashok1, Raymond R Dagastine1
1Department of Chemical Engineering, University of Melbourne, Parkville, VIC 3010, Australia.
Langmuir : the ACS journal of surfaces and colloids
|December 7, 2023
概括
布朗动力学模拟可以帮助克服用于研究体粒子的全内部反射显微镜 (TIRM) 的局限性. 模拟确定了在复杂流体中使用纳米粒子进行TIRM实验的最佳条件.
科学领域:
- 合体和表面科学科学
- 计算物理 计算物理
- 材料科学 材料科学 材料科学
背景情况:
- 总内部反射显微镜 (TIRM) 对于分析表面附近的布朗环状粒子动态至关重要.
- 实验TIRM在复杂流体中的纳米和亚微米合物具有局限性.
- 布朗动力学模拟提供了一种扩展TIRM功能的方式.
研究的目的:
- 使用布朗动力学模拟来确定适合于TIRM实验的合体系统.
- 探索和克服TIRM在结构化流体中的小合体的实验限制.
- 为成功的TIRM研究指导选择颗粒大小,材料和溶液条件.
主要方法:
- 开发了一个基于兰格温方程的布朗动力学算法.
- 在玻璃表面附近模拟的环状颗粒运动 (聚乙烯,).
- 将范德瓦尔斯,电双层和结构力纳入模拟.
主要成果:
- 在电解质溶液中确定TIRM的最小颗粒大小和材料密度标准.
- 确定了TIRM的粒子大小,材料和多电解质度的最佳范围.
- 显示的模拟可以预测粒子避免被困在结构能量井中的条件.
结论:
- 布朗动力学模拟对于优化TIRM实验非常有价值.
- 模拟引导的选择增强了近表面合体动态的研究.
- 这种方法扩大了TIRM对具有挑战性的体系统的适用性.
相关概念视频
01:17Colloids and Suspensions
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
01:29The Colloidal State
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...