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首页> 外文期刊>Journal of the Physical Society of Japan >X-ray Diffraction Study on Simple Molecular Glasses Created by Low-Temperature Vapor Deposition
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X-ray Diffraction Study on Simple Molecular Glasses Created by Low-Temperature Vapor Deposition

机译：低温气相沉积法制备简单分子玻璃的X射线衍射研究

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摘要

The structure of simple molecular glasses has been one of the central issues in the research of glasses. We tried to form the glasses of carbon dioxide (CO2), carbon monoxide (CO), and nitrogen (N-2) molecules by slow vapor deposition at 3 K (deposition rate: ca. 10nm/h). Glassy CO2 was successfully obtained and it crystallized on heating at 25 K, which is lower than the hypothetical glass transition temperature of CO2. The CO2 glass is the simplest molecular glass ever created. The X-ray diffraction patterns and derived pair distribution functions revealed that the glassy CO2 has a structure in which the intermolecular distance is shorter and the intermolecular correlation is much stronger than those of liquid CO2. Orientational glasses, which are positionally ordered and orientationally disordered, of CO and N-2 were obtained and they were gradually ordered as the annealing temperature is increased.
机译：简单分子眼镜的结构一直是眼镜研究的中心问题之一。我们试图通过在3 K（沉积速率：约10nm / h）下缓慢气相沉积来形成二氧化碳（CO2），一氧化碳（CO）和氮（N-2）分子的玻璃。成功获得了玻璃状CO2，并在25 K的加热条件下结晶，该温度低于假设的CO2玻璃化转变温度。二氧化碳玻璃是有史以来最简单的分子玻璃。 X射线衍射图和导出的成对分布函数表明，玻璃态CO 2具有比液体CO 2的分子间距离更短且分子间的相关性更强的结构。获得了CO和N-2的位置有序和取向无序的取向玻璃，并且随着退火温度的升高它们逐渐有序。

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