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纳米粒子单层中的拓相:晶体,六体和同位流体相可以在同一单层中共存吗?

Kaustav Bhattacharjee¹, Salil S Vaidya¹, Tushar Pathak¹

¹Physical and Material Chemistry Division, National Chemical Laboratory, Pune 411008, India. kaustavbhattacharjee@gmail.com.

|September 25, 2023

概括

纳米粒子单层表现出三种不同的拓阶段 - - 晶体,六度和同位素流体 - - 在同一系统中共存. 这种共存与粒子大小变化有关,通过频率参数 (p25) 来量化.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
软物质物理学软物质物理学

背景情况:

拓相是2D系统中物质的稳定状态,对于确定材料属性至关重要.
之前关于拓相变和缺陷动态的研究主要使用较大的体系统.
关于这些现象的纳米粒子单层 (NPMLs) 的研究是有限的.

研究的目的:

研究纳米粒子单层 (NPMLs) 中拓相的共存.
为了将晶体,六极体和同位流体相的发生与局部粒子大小变化相关联.
为了建立粒子大小分布和拓相位行为之间的定量关系.

主要方法:

使用蒸发驱动的自组装工艺来形成NPML.
分析NPML的存在和共存的晶体,六度和同位素流体相.
使用频率参数 (p25) 量化局部粒子大小变化,表示大小偏差>=25%的纳米粒子的部分.

主要成果:

在同一NPML中证明了晶体,六极体和同otropic-fluid相的共存.
为每个阶段建立了不同的p25范围:晶体 (p25 <~0.02),六态 (0.02 <= p25 <= 0.1) 和同源流体 (p25 >= 0.1).
基于KTHNY理论和拓缺陷积累的平面应变的数值推断的相发生.

结论:

局部粒子大小变化是推动NPML中拓相共存的关键因素.
频率参数 (p25) 作为可靠的指标,用于预测NPML中的拓相.
这些发现为纳米系统的拓相变提供了新的理解.

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