能否使用原子力显微镜与加热获得升华度? 一个PETN纳米片的情况
Ekaterina Kosareva1, Radmir Gainutdinov2, Anna Nikolskaia3
1N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119991 Moscow, Russia.
Langmuir : the ACS journal of surfaces and colloids
|June 23, 2023
概括
原子力显微镜 (AFM) 在能量材料升华过程中跟踪纳米尺度体积变化. 可以发生意想不到的低温再结晶,需要仔细分析样本形态,以准确地估计升华度.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 蒸发对于高能质材料的性能和检测至关重要.
- 传统方法侧重于散装升华变化,限制对热敏感材料的研究.
- 纳米级结构效应可以使升华质量损失测量复杂化.
研究的目的:
- 通过使用AFM,研究甲四酸 (PETN) 薄膜升华.
- 了解测量参数,加热,样品成分和基板对升华的影响.
- 在能量材料蒸发过程中探索纳米级结构效应.
主要方法:
- 使用原子力显微镜 (AFM) 来监测在加热过程中PETN薄膜的体积变化.
- 控制式加热技术和各种测量参数,样品组成和基板.
- 分析了纳米级结构转换与升华一起.
主要成果:
- 观察到与升华并发的薄膜岛屿的低温再结晶.
- 记录了随着温度上升而发生的意想不到的局部体积增加.
- 展示了AFM精确纳米级蒸发实验的能力.
结论:
- AFM 能够对能量材料进行详细的纳米级蒸发研究.
- 必须考虑重结晶等同时发生的结构变化,以获得准确的升华度.
- 样品形态和动态结构变化对于有效的基于AFM的蒸发分析至关重要.
相关概念视频
Phase Transitions: Sublimation and Deposition
17.3K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.3K
Sublimation
779
Sublimation is the direct transformation of a solid to a gaseous state. For instance, at standard pressure and room temperature, solid carbon dioxide sublimes to gaseous carbon dioxide. The phase diagram depicts the conditions required for sublimation. This process occurs at the solid-gas phase boundary and is not observed above the triple point of the substance. The reverse of sublimation is called deposition, where a gaseous substance condenses directly into a solid. Sublimation and...
779


