国家决定的关于CO2粘附于CO2冰的研究
Charlotte Jansen1, Ludo B F Juurlink1
1Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands.
Frontiers in chemistry
|September 11, 2023
概括
二氧化碳 (CO2) 分子的内部振动不会显著影响它们的凝结成二氧化碳冰. 这项研究发现对粘结概率和冰结构的影响微不足道,振动刺激的影响最小.
科学领域:
- 表面科学是一门学科.
- 物理化学 物理化学
- 频谱学是一种光谱学.
背景情况:
- 分子内部振动可以影响表面相互作用,如吸附,散射和反应.
- 二氧化碳的反对称拉伸振动 (ν3) 的能量接近二氧化碳从二氧化碳冰中脱落的能量.
研究的目的:
- 调查气相CO2的 ν3振动是否会影响其凝结成CO2冰.
- 量化振动刺激对二氧化碳粘附概率和冰形成的影响.
主要方法:
- 超音速分子束技术用于控制的气相CO2输送.
- 振动状态解决激发以针对特定的CO2振动状态.
- 反射吸收红外光谱 (RAIRS) 用于冰的检测.
- 用调制和富里埃变换检测的金和威尔斯方法来量化粘合概率.
主要成果:
- 在实验条件下,3振动对二氧化碳冰结构和粘结概率的影响是可以忽略不计的.
- 重量平均粘住概率量化为大约0.9.
- 状态解析和平均测量之间的粘贴概率的差异低于0.03%.
结论:
- 二氧化碳的内部振动激发对其凝结到二氧化碳冰的影响很小.
- 来自3振动的能量转移不足以显著改变凝结过程.
- 二氧化碳在二氧化碳冰上粘合的概率很高,并且在很大程度上独立于特定的振动状态.
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