在温度梯度存在的情况下,热响应颗粒的热晶体的直径取决于温度
Rahul Karmakar1, J Chakrabarti1
1Department of Physics of Complex Systems, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake Kolkata 700106, India.
The Journal of chemical physics
|July 19, 2023
概括
温度梯度中的非平衡稳定状态揭示了热敏微凝颗粒中长距离的结构秩序. 这种排序是由于热和冷地区的包装和压力增加而产生的.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学是一种材料科学.
- 统计力学就是统计力学.
背景情况:
- 非平衡稳定状态对于理解复杂系统至关重要,但仍然不太了解.
- 温度梯度可以建立非平衡稳定状态.
- 热敏的微凝颗粒,如聚-N-异烯胺,由于水吸附而表现出温度依赖的尺寸变化.
研究的目的:
- 为了研究温度梯度下的热响应粒子中的结构形成.
- 探索温度敏感直径变化对粒子排序的影响.
- 了解在非平衡系统中控制自我组装的基本原则.
主要方法:
- 用分子动力学模拟来建模粒子行为.
- 使用Langevin恒温器来保持系统动态.
- 债券订单参数被用来量化长期结构性订单.
主要成果:
- 在系统的寒冷和热热区域中观察到长距离的结构秩序.
- 订购发生在冷和热颗粒之间的特定直径比率之外.
- 增加的包装密度和压力被确定为观察到的顺序的驱动力.
结论:
- 热响应粒子在非平衡稳定状态条件下可以形成有序结构.
- 这些发现突出了粒子大小和粒子间力量在决定结构形成中的作用.
- 这项研究提供了极端非平衡条件下的有序结构的见解.
相关概念视频
Recrystallization: Solid–Solution Equilibria
1.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.1K
Crystal Growth: Principles of Crystallization
2.1K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
2.1K


